Professor Roger Lewis

All Stories

1. 
   Matrix-Embedding Effects on Nanodiamond Phonons

   Article • Nano Letters, August 2025, American Chemical Society (ACS)

   Professor Roger Lewis

2. 
   On the application of the Heisenberg uncertainty relations to the hydrogen atom

   Article • European Journal of Physics, July 2025, Institute of Physics Publishing

   Professor Roger Lewis

3. 
   Terahertz Vibrational Dynamics and DFT Calculations for the Quantum Spin Chain Linarite, PbCuSO4(OH)2

   Article • The Journal of Physical Chemistry A, February 2024, American Chemical Society (ACS)

   Professor Roger Lewis

4. 
   Terahertz spectroscopy of paper to low temperatures

   Article • Cellulose, December 2023, Springer Science + Business Media

   Professor Roger Lewis

5. 
   Theoretical modeling of the terahertz spectrum of l-tyrosine leads to experimental verification of previously unobserved vibrational mode

   Article • The Journal of Chemical Physics, September 2023, American Institute of Physics

   Professor Roger Lewis

6. 
   Semiconductor Terahertz Physics

   Article • Annalen der Physik, June 2023, Wiley

   Professor Roger Lewis

7. 
   Determination of Vibrational Modes of l-Alanine Single Crystals by a Combination of Terahertz Spectroscopy Measurements and Density Functional Calculations

   Article • Physical Review Letters, June 2023, American Physical Society (APS)

   Professor Roger Lewis

8. 
   Characteristic Spectral Features of Terra Preta (TP) in the 5–15 Terahertz Range

   Article • Applied Spectroscopy, February 2022, SAGE Publications

   Professor Roger Lewis

9. 
   High-quality, temperature-dependent terahertz spectroscopy of single crystalline L-alanine: Experiment and density-functional theory

   Article • The Journal of Chemical Physics, June 2021, American Institute of Physics

   Professor Roger Lewis

10. 
    Piezoresistive and Electrical Properties of a Catecholic Amino Acid–Polyacrylamide Single-Walled Carbon Nanotube Hydrogel Hybrid Network

    Article • ACS Applied Polymer Materials, January 2021, American Chemical Society (ACS)

    Professor Roger Lewis

11. 
    Terahertz response of dl-alanine: experiment and theory

    Article • Physical Chemistry Chemical Physics, January 2021, Royal Society of Chemistry

    Professor Roger Lewis

12. 
    Estimating my equilibrium energy intake during lockdown: very introspective study

    Article • BMJ, December 2020, BMJ

    Professor Roger Lewis

13. 
    Aerographite phonon density of states affects double resonant Raman scattering

    Article • Journal of Applied Physics, November 2020, American Institute of Physics

    Hao Zhang, Professor Roger Lewis

14. 
    Identifying and explaining vibrational modes of quinacridones via temperature-resolved terahertz spectroscopy: absorption experiments and solid-state density functional theory simulations

    Article • Physical Chemistry Chemical Physics, January 2020, Royal Society of Chemistry

    Professor Roger Lewis

15. 
    Effects of Ca substitution on quasiacoustic sliding modes in Sr14−xCaxCu24O41

    Article • November 2019, American Physical Society (APS)

    Professor Roger Lewis

16. 
    Thermionic enhanced heat transfer in electronic devices based on 3D Dirac materials

    Article • Journal of Applied Physics, October 2019, American Institute of Physics

    Professor Roger Lewis

17. 
    A review of terahertz detectors

    Article • Journal of Physics D Applied Physics, August 2019, Institute of Physics Publishing

    Professor Roger Lewis

18. 
    Superficial and Fundamental Correspondences in the Terahertz/IR (6–15 THz) Absorption Spectra of Aspirin and Benzoic Acid

    Article • The Journal of Physical Chemistry A, August 2018, American Chemical Society (ACS)

    Professor Roger Lewis

19. 
    Electrical Versus Optical: Comparing Methods for Detecting Terahertz Radiation Using Neon Lamps

    Article • Journal of Infrared Millimeter and Terahertz Waves, May 2018, Springer Science + Business Media

    Professor Roger Lewis

20. 
    Distinguishing Quinacridone Pigments via Terahertz Spectroscopy: Absorption Experiments and Solid-State Density Functional Theory Simulations

    Article • The Journal of Physical Chemistry A, April 2017, American Chemical Society (ACS)

    Professor Roger Lewis

21. 
    Azimuthal dependence of the Garton-Tomkins orbit in crossed magnetic and electric fields

    Article • August 2016, American Physical Society (APS)

    Professor Roger Lewis

22. 
    Semiconductor hydrogen analogue candidates for observation of quasi-Landau oscillations associated with semi-classical electron orbits

    Article • physica status solidi (b), August 2015, Wiley

    Professor Roger Lewis

23. 
    Optical reflectance studies of highly specular anisotropic nanoporous (111) InP membrane

    Article • Semiconductor Science and Technology, March 2015, Institute of Physics Publishing

    Professor Roger Lewis

24. 
    Laser-induced oxidation kinetics of bismuth surface microdroplets on GaAsBi studied in situ by Raman microprobe analysis

    Article • Optics Express, December 2014, Optical Society of America (OSA)

    Professor Roger Lewis

25. 
    3D Printed Terahertz Diffraction Gratings And Lenses

    Article • Journal of Infrared Millimeter and Terahertz Waves, November 2014, Springer Science + Business Media

    Professor Roger Lewis

26. 
    In situ micro-Raman studies of laser-induced bismuth oxidation reveals metastability of β-Bi_2O_3 microislands

    Article • Optical Materials Express, September 2014, Optical Society of America (OSA)

    Professor Roger Lewis

27. 
    3D printing of aspherical terahertz lenses and diffraction gratings

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

28. 
    Absorption spectra of benzoic acid in the 5–15 THz range

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

29. 
    Pump polarization dependence of optical rectification for 112A GaAs

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

30. 
    THz absorption bands in Sr14Cu24O41 by synchrotron radiation

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

31. 
    Terahertz sources

    Article • Journal of Physics D Applied Physics, August 2014, Institute of Physics Publishing

    Professor Roger Lewis

32. 
    THz photomixer with milled nanoelectrodes on LT-GaAs

    Article • Applied Physics A, August 2014, Springer Science + Business Media

    Professor Roger Lewis

33. 
    Complementary terahertz absorption and inelastic neutron study of the dynamic anisotropy contribution to zone-center spin waves in a canted antiferromagnetNdFeO3

    Article • Physical Review B, August 2014, American Physical Society (APS)

    Professor Roger Lewis

34. 
    Effect of heavy noble gas ion irradiation on terahertz emission efficiency of InP (100) and (111) crystal planes

    Article • Semiconductor Science and Technology, August 2014, Institute of Physics Publishing

    Professor Roger Lewis

35. 
    Raman scattering reveals strong LO-phonon-hole-plasmon coupling in nominally undoped GaAsBi: optical determination of carrier concentration

    Article • Optics Express, May 2014, Optical Society of America (OSA)

    Professor Roger Lewis

36. 
    Closed-orbit dependence on the field direction in the anisotropic diamagnetic Kepler problem

    Article • Physical Review A, April 2014, American Physical Society (APS)

    Professor Roger Lewis

37. 
    THz photomixer with a 40nm-wide nanoelectrode gap on low-temperature grown GaAs

    Article • December 2013, SPIE

    Professor Roger Lewis

38. 
    Spherical, cylindrical and tetrahedral symmetries; hydrogenic states at high magnetic field in Si:P

    Article • Scientific Reports, December 2013, Nature

    Professor Roger Lewis

39. 
    Raman scattering studies of strain effects in (100) and (311)B GaAs1−xBix epitaxial layers

    Article • Journal of Applied Physics, November 2013, American Institute of Physics

    Professor Roger Lewis

40. 
    Energy loss rate of a charged particle in HgTe/(HgTe, CdTe) quantum wells

    Article • Applied Physics Letters, November 2013, American Institute of Physics

    Professor Roger Lewis, Yee Sin Ang

41. 
    Dielectric properties of Bi doped Sb2Te3 thin films studied by terahertz time-domain spectroscopy

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

42. 
    High temperature anisotropy of NdFeO3 determined using time-domain THz spectroscopy

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

43. 
    Optical characterization of novel terahertz emitters

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

44. 
    Signature of aromatic carbons in the terahertz spectroscopy of bio-chars

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

45. 
    Time-domain spectroscopy of novel nematic liquid crystals in the terahertz range

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

46. 
    Parameters Controlling Emission of Terahertz Frequency Electromagnetic Radiation from InAs and GaAs: An Ensemble Monte Carlo Simulation Study

    Article • ECS Transactions, March 2013, The Electrochemical Society

    Professor Roger Lewis

47. 
    Collective librations of water molecules in the crystal lattice of rubidium bromide: experiment and simulation

    Article • Physical Chemistry Chemical Physics, January 2013, Royal Society of Chemistry

    Joseph Horvat, Professor Roger Lewis

48. 
    Photomixing in topological insulator HgTe/CdTe quantum wells in terahertz regime

    Article • Applied Physics Letters, November 2012, American Institute of Physics

    Professor Roger Lewis, Yee Sin Ang

49. 
    Infrared phonon anomaly and magnetic excitations in single-crystal Cu3Bi(SeO3)2O2Cl

    Article • Physical Review B, November 2012, American Physical Society (APS)

    Professor Roger Lewis

50. 
    Terahertz surfoluminescence

    Article • Surface Science, November 2012, Elsevier

    Professor Roger Lewis

51. 
    Optical parameters of ZnTe determined using continuous-wave terahertz radiation

    Article • Journal of Applied Physics, September 2012, American Institute of Physics

    Professor Roger Lewis

52. 
    Terahertz photon mixing effect in graphene and topological insulator

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis, Yee Sin Ang

53. 
    Complementary techniques for probing terahertz magnetic excitations in Cu3Bi(SeO3)2O2Cl

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

54. 
    Material characterization at low frequencies using THz and Raman spectroscopy

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

55. 
    Nonlinear response of topological insulators in the terahertz regime

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

56. 
    The importance of scattering, surface potential, and vanguard counter-potential in terahertz emission from gallium arsenide

    Article • Applied Physics Letters, June 2012, American Institute of Physics

    Professor Roger Lewis

57. 
    Spatial dispersion in three-dimensional drawn magnetic metamaterials

    Article • Optics Express, May 2012, Optical Society of America (OSA)

    Professor Roger Lewis

58. 
    Probing and modelling the localized self-mixing in a GaN/AlGaN field-effect terahertz detector

    Article • Applied Physics Letters, April 2012, American Institute of Physics

    Professor Roger Lewis

59. 
    Role of vanguard counter-potential in terahertz emission due to surface currents explicated by three-dimensional ensemble Monte Carlo simulation

    Article • Physical Review B, October 2011, American Physical Society (APS)

    Professor Roger Lewis

60. 
    Characterising Zinc Telluride wafers using continuous-wave terahertz spectroscopy

    Article • October 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

61. 
    Geometrical factors in the emission of terahertz radiation from semiconductors under excitation by sub-picosecond pump pulses

    Article • October 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

62. 
    Stacked-and-drawn metamaterials with magnetic resonances in the terahertz range

    Article • Optics Express, August 2011, Optical Society of America (OSA)

    Professor Roger Lewis

63. 
    Direct-drawn metamaterial fibers with magnetic response in the 100GHz range

    Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

64. 
    Optical rectification for terahertz generation

    Article • physica status solidi c, May 2011, Wiley

    Professor Roger Lewis

65. 
    Fiber metamaterials with negative magnetic permeability in the terahertz

    Article • Optical Materials Express, April 2011, Optical Society of America (OSA)

    Professor Roger Lewis

66. 
    LET’S TALK TERAHERTZ!

    Article • American Journal of Physics, April 2011, American Association of Physics Teachers (AAPT)

    Professor Roger Lewis

67. 
    Bulk and surface field-induced optical rectification from(11N)zincblende crystals in a quasireflection geometry

    Article • Physical Review B, March 2011, American Physical Society (APS)

    Professor Roger Lewis

68. 
    Heavy noble gas (Kr, Xe) irradiated (111) InP nanoporous honeycomb membranes with enhanced ultrafast all-optical terahertz emission

    Article • Applied Physics Letters, November 2010, American Institute of Physics

    Professor Roger Lewis

69. 
    Mechanisms of x-ray emission from peeling adhesive tape

    Article • Applied Physics Letters, September 2010, American Institute of Physics

    Professor Roger Lewis

70. 
    Characterization of semiconductor materials as terahertz emitters under the effect of in-plane magnetic field

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

71. 
    Comparison of expressions for terahertz generation for bulk optical rectification away from normal incidence

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

72. 
    Detection of biochar components for soil fertility using THz-TDS

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

73. 
    THz-TDS of filter paper at differing humidities

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

74. 
    Extremely broadband characterization of a Schottky diode based THz detector

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

75. 
    Reconciling expressions for terahertz generation by bulk optical rectification

    Article • April 2010, SPIE

    Professor Roger Lewis

76. 
    Terahertz time-domain spectroscopy of nematic liquid crystals

    Article • April 2010, SPIE

    Professor Roger Lewis

77. 
    Energy States of Phosphorous Donor in Silicon in Fields up to 18 T

    Article • Journal of Low Temperature Physics, January 2010, Springer Science + Business Media

    Professor Roger Lewis

78. 
    Terahertz emission from InP

    Article • January 2010, American Institute of Physics

    Professor Roger Lewis

79. 
    Generation of terahertz radiation by bulk and surface optical rectification from crystal planes of arbitrary orientation

    Article • Physical Review B, November 2009, American Physical Society (APS)

    Professor Roger Lewis

80. 
    A terahertz system of units

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

81. 
    THz generation by optical rectification involving high-index planes

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

82. 
    Terahertz generation by optical rectification in GaAs and related materials

    Article • August 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

83. 
    Peeling adhesive tape emits electromagnetic radiation at terahertz frequencies

    Article • Optics Letters, July 2009, Optical Society of America (OSA)

    Professor Roger Lewis

84. 
    Metastability in the resistance of polycrystalline La0.8Li0.2MnO3

    Article • physica status solidi (RRL) - Rapid Research Letters, July 2009, Wiley

    Professor Roger Lewis

85. 
    The role of optical rectification in the generation of terahertz radiation from GaBiAs

    Article • Applied Physics Letters, June 2009, American Institute of Physics

    Professor Roger Lewis

86. 
    Comparison of photoexcited p-InAs THz radiation source with conventional thermal radiation sources

    Article • Journal of Applied Physics, March 2009, American Institute of Physics

    Professor Roger Lewis

87. 
    Small electroresistance (SER) in bulk La2/3Sr1/3MnO3 below

    Article • Journal of Alloys and Compounds, March 2009, Elsevier

    Professor Roger Lewis

88. 
    New modes of THz generation by low-temperature-grown GaAsSb

    Article • Solid-State Electronics, February 2009, Elsevier

    Professor Roger Lewis

89. 
    Efficiency in nanometre gap vacuum thermionic refrigerators

    Article • Journal of Physics D Applied Physics, January 2009, Institute of Physics Publishing

    Professor Roger Lewis

90. 
    Terahertz Physics

    Article • January 2009, Cambridge University Press

    Professor Roger Lewis

91. 
    Investigation of THz Emission by p-GaAsSb

    Article • January 2009, The Electrochemical Society

    Professor Roger Lewis

92. 
    Publisher’s Note: Investigation of p-GaAsSb as a THz Emitter [J. Electrochem. Soc., 155, H734 (2008)]

    Article • Journal of The Electrochemical Society, January 2009, The Electrochemical Society

    Professor Roger Lewis

93. 
    Single-cycle azimuthal angle dependence of terahertz radiation from (100) n-type InP

    Article • Applied Physics Letters, December 2008, American Institute of Physics

    Professor Roger Lewis

94. 
    Time-domain THz spectroscopy using acceptor-doped GaAs photoconductive emitters

    Article • Semiconductor Science and Technology, September 2008, Institute of Physics Publishing

    Professor Roger Lewis

95. 
    Emission of terahertz-frequency electromagnetic radiation from indium phosphide under excitation by short pulses of near-infrared radiation

    Article • September 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Roger Lewis

96. 
    Never a dull moment

    Article • American Journal of Physics, July 2008, American Association of Physics Teachers (AAPT)

    Professor Roger Lewis

97. 
    Electroresistance of La0.8Li0.2MnO3

    Article • Applied Physics Letters, May 2008, American Institute of Physics

    Professor Roger Lewis

98. 
    Subterahertz Josephson plasma emission in layered high-TC superconducting tunnel junctions

    Article • Journal of Applied Physics, April 2008, American Institute of Physics

    Professor Roger Lewis

99. 
    Terahertz Zeeman spectroscopy of boron in germanium to high magnetic fields

    Article • Physical Review B, March 2008, American Physical Society (APS)

    Professor Roger Lewis

100. 
     Electronic and thermal transport in hot carrier solar cells with low-dimensional contacts

     Article • Microelectronics Journal, March 2008, Elsevier

     Professor Roger Lewis

101. 
     Thermionic refrigeration in low-dimensional structures

     Article • Microelectronics Journal, March 2008, Elsevier

     Professor Roger Lewis

102. 
     Reflectance studies of candidate THz emitters

     Article • Journal of Materials Science Materials in Electronics, February 2008, Springer Science + Business Media

     Professor Roger Lewis

103. 
     Investigation of p-GaAsSb as a THz Emitter

     Article • Journal of The Electrochemical Society, January 2008, The Electrochemical Society

     Professor Roger Lewis

104. 
     Semiconductor terahertz emitters

     Article • December 2007, SPIE

     Professor Roger Lewis

105. 
     Physical Phenomena in Electronic Materials in the Terahertz Region

     Article • Proceedings of the IEEE, August 2007, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

106. 
     Terahertz imaging: materials and methods

     Article • Journal of Materials Science Materials in Electronics, March 2007, Springer Science + Business Media

     Professor Roger Lewis

107. 
     Thermionic refrigerators with non-Richardson current

     Article • Journal of Physics D Applied Physics, February 2007, Institute of Physics Publishing

     Professor Roger Lewis

108. 
     Low thermal conductivity short-period superlattice thermionic devices

     Article • Journal of Physics D Applied Physics, September 2006, Institute of Physics Publishing

     Professor Roger Lewis

109. 
     THz Emission from Mercury Cadmium Telluride Films Grown on Cadmium Zinc Telluride Substrates

     Article • September 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

110. 
     Magnetospectroscopy to 30T of donor states in InP

     Article • Physica B Condensed Matter, April 2006, Elsevier

     Professor Roger Lewis

111. 
     THz generation in InAs

     Article • Physica B Condensed Matter, April 2006, Elsevier

     Professor Roger Lewis

112. 
     Far Infrared Spectra of La1−xCaxMn0.9Li0.1O3

     Article • Journal of Physics Conference Series, January 2006, Institute of Physics Publishing

     Professor Roger Lewis

113. 
     Power generation with nanowire resonant tunneling thermoelectrics

     Article • January 2006, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

114. 
     Conventional and total momentum filtered thermionic devices

     Article • December 2005, SPIE

     Professor Roger Lewis

115. 
     The effect of barrier shape on thermionic refrigerator performance

     Article • December 2005, SPIE

     Professor Roger Lewis

116. 
     Magnetopolaron interactions inn-type indium phosphide

     Article • Physical Review B, December 2005, American Physical Society (APS)

     Professor Roger Lewis

117. 
     Strong terahertz emission from (100) p-type InAs

     Article • Journal of Applied Physics, December 2005, American Institute of Physics

     Professor Roger Lewis

118. 
     Electronic efficiency in nanostructured thermionic and thermoelectric devices

     Article • Physical Review B, November 2005, American Physical Society (APS)

     Professor Roger Lewis

119. 
     Infrared-active phonons of perovskite HoMn/sub 1-x/Co/sub x/O/sub 3/ (x=0--0.8)

     Article • IEEE Transactions on Magnetics, October 2005, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

120. 
     Solid-state thermionics and thermoelectrics in the ballistic transport regime

     Article • Journal of Applied Physics, July 2005, American Institute of Physics

     Professor Roger Lewis

121. 
     Magneto-optical far-infrared absorption spectroscopy of the hole states of indium phosphide

     Article • Physical Review B, March 2005, American Physical Society (APS)

     Professor Roger Lewis

122. 
     Principles of charge and heat transport in thermionic devices

     Article • February 2005, SPIE

     Professor Roger Lewis

123. 
     The effect of the electron energy spectrum on electronic efficiency and power in thermionic and thermoelectric devices

     Article • January 2005, Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

124. 
     MAGNETOSPECTROSCOPY OF Zn-DOPED InP TO 30 T

     Article • International Journal of Modern Physics B, November 2004, World Scientific Pub Co Pte Lt

     Professor Roger Lewis

125. 
     Phonon spectra of cobaltite/manganites in strong magnetic fields

     Article • Journal of Magnetism and Magnetic Materials, May 2004, Elsevier

     Professor Roger Lewis

126. 
     Zeeman spectroscopy of Be impurity in GaAs to

     Article • Physica B Condensed Matter, April 2004, Elsevier

     Professor Roger Lewis

127. 
     High-field magnetotransport in a two-dimensional electron gas in quantizing magnetic fields and intense terahertz laser fields

     Article • Journal of Physics Condensed Matter, December 2003, Institute of Physics Publishing

     Professor Roger Lewis

128. 
     Magnetospectroscopy of Be in GaAs

     Article • June 2003, American Physical Society (APS)

     Professor Roger Lewis

129. 
     Zeeman spectroscopy of the Zn acceptor in InP

     Article • Solid State Communications, May 2003, Elsevier

     Professor Roger Lewis

130. 
     Investigation into space charge effects in I–V characteristics of multi-layer semiconductor thermionic devices

     Article • Physica E Low-dimensional Systems and Nanostructures, April 2003, Elsevier

     Professor Roger Lewis

131. 
     Far-infrared reflection and transmission of La1−xCaxMnO3

     Article • Journal of Alloys and Compounds, December 2002, Elsevier

     Professor Roger Lewis

132. 
     EFFECT OF STRONG TERAHERTZ RADIATION ON MAGNETOCONDUCTIVITY IN TWO DIMENSIONS

     Article • International Journal of Modern Physics B, August 2002, World Scientific Pub Co Pte Lt

     Professor Roger Lewis

133. 
     FERROMAGNETIC RESONANCES IN POLYCRYSTALLINE La0.8Li0.2MnO3

     Article • International Journal of Modern Physics B, August 2002, World Scientific Pub Co Pte Lt

     Professor Roger Lewis

134. 
     Photoconductivity of Be-doped GaAs under intense terahertz radiation

     Article • Solid State Communications, April 2002, Elsevier

     Professor Roger Lewis

135. 
     Electronic thermal transport and thermionic cooling in semiconductor multi-quantum-well structures

     Article • Computer Physics Communications, December 2001, Elsevier

     Professor Roger Lewis

136. 
     Numerical calculation of thermionic cooling efficiency in a double-barrier semiconductor heterostructure

     Article • Physica E Low-dimensional Systems and Nanostructures, October 2001, Elsevier

     Professor Roger Lewis

137. 
     Phonon modes of A(Co1/2Mn1/2) O3 (A=La, Nd, Dy, Ho, Yb)

     Article • Journal of Solid State Chemistry, September 2001, Elsevier

     Professor Roger Lewis

138. 
     Synthesis and magnetic properties of perovskite La1−xCaxMn0.9Li0.1O3

     Article • Journal of Alloys and Compounds, July 2001, Elsevier

     Professor Roger Lewis

139. 
     Far-infrared spectroscopy of the zinc acceptor in indium phosphide

     Article • Physica B Condensed Matter, January 2001, Elsevier

     Professor Roger Lewis

140. 
     Article • Journal of Superconductivity and Novel Magnetism, January 2001, Springer Science + Business Media

     Professor Roger Lewis

141. 
     Infrared absorption of lanthanum manganites

     Article • Physica C Superconductivity, November 2000, Elsevier

     Professor Roger Lewis

142. 
     Internal transitions of confined neutral magnetoexcitons inGaAs/AlxGa1−xAsquantum wells

     Article • July 2000, American Physical Society (APS)

     Professor Roger Lewis

143. 
     Cyclotron resonance in undoped, top-gated heterostructures

     Article • Semiconductor Science and Technology, May 2000, Institute of Physics Publishing

     Professor Roger Lewis

144. 
     Piezospectroscopy of thep3/2and Fano series of singly ionized zinc in germanium

     Article • March 2000, American Physical Society (APS)

     Professor Roger Lewis

145. 
     Quantum point contact in a magnetic field: Far-infrared resonant heating observed in photoconductivity

     Article • Applied Physics Letters, November 1999, American Institute of Physics

     Professor Roger Lewis

146. 
     Zeeman spectroscopy of the Be acceptor in GaAs to intermediate fields

     Article • Solid State Communications, August 1999, Elsevier

     Professor Roger Lewis

147. 
     Central-cell corrections for Si and S in GaAs in a strong magnetic field

     Article • Journal of Applied Physics, January 1999, American Institute of Physics

     Professor Roger Lewis

148. 
     Far-infrared studies of extremely high mobility gated GaAs/AlGaAs structures in magnetic fields

     Article • Physica B Condensed Matter, December 1998, Elsevier

     Professor Roger Lewis

149. 
     Magneto-photoconductivity of a 2DEG under intense terahertz radiation

     Article • Physica B Condensed Matter, December 1998, Elsevier

     Professor Roger Lewis

150. 
     Magneto-plasmon spectrum in a semiconductor under intense laser radiation

     Article • Physica B Condensed Matter, December 1998, Elsevier

     Professor Roger Lewis

151. 
     Magneto-Spectroscopy of Beryllium Impurity in Gallium Arsenide

     Article • physica status solidi (b), December 1998, Wiley

     Professor Roger Lewis

152. 
     Far-infrared laser photoconductivity of n-GaAs multiple quantum wells in a pulsed magnetic field

     Article • Physica B Condensed Matter, May 1998, Elsevier

     Professor Roger Lewis

153. 
     Spectroscopy and piezospectroscopy of the Lyman transitions and Fano resonances of indium in silicon

     Article • July 1996, American Physical Society (APS)

     Professor Roger Lewis

154. 
     Magneto-oscillations and field-induced phase transitions in organic conductors

     Article • Surface Science, July 1996, Elsevier

     Professor Roger Lewis

155. 
     Energy states of Be in GaAs

     Article • May 1996, American Physical Society (APS)

     Professor Roger Lewis

156. 
     Video introductions to laboratory: Students positive, grades unchanged

     Article • American Journal of Physics, May 1995, American Association of Physics Teachers (AAPT)

     Professor Roger Lewis

157. 
     Piezospectroscopy of the and fano series of singly ionised Zn in Ge

     Article • Solid State Communications, February 1995, Elsevier

     Professor Roger Lewis

158. 
     Cyclotron resonance measurements of the hole mass in [0 0 1] and [1 1 1] InxGa1−xSb/GaSb quantum wells

     Article • Physica B Condensed Matter, February 1993, Elsevier

     Professor Roger Lewis

159. 
     Cyclotron resonance of mixed phases of the 2-D system in the ultra-quantum limit

     Article • Physica B Condensed Matter, February 1993, Elsevier

     Professor Roger Lewis

160. 
     Computer assignments and problems classes for physics students

     Article • Computers & Education, January 1991, Elsevier

     Professor Roger Lewis

161. 
     Student scanning tunneling microscope

     Article • American Journal of Physics, January 1991, American Association of Physics Teachers (AAPT)

     Professor Roger Lewis

162. 
     Fano resonances in the absorption spectrum of singly ionised zinc in germanium

     Article • Solid State Communications, September 1990, Elsevier

     Professor Roger Lewis

163. 
     Electrical and Thermal Characteristics of Multilayer Thermionic Power Devices

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

164. 
     Terahertz Absorption by Magnetoplasma Sound Wave Excitation in Semiconductor Heterostructures

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

165. 
     The Electron Energy Spectrum and Thermionic Device Efficiency

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

166. 
     Thermionic cooling of optoelectronic and microelectronic devices

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis

167. 
     Far-infrared measurements of cyclotron resonance and impurity transitions in bulk n-GaAs in pulsed magnetic fields

     Article • Institute of Electrical & Electronics Engineers (IEEE)

     Professor Roger Lewis