What is it about?
For nanotechnology applications, Bowtie-shape aperture design can be optimized to focus light to achieve smaller spot and higher transmission. This new type of lens can be used in laser fabrication process (lithography) for creating smaller nano scale objects.
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Why is it important?
Our simulation result shows that the focus spot size can be 40% smaller by adding rings around the bowtie aperture , and the focus spot is more symmetrical. This design can solve the problem of non-symmetrical focus spot for this type of focusing lens.
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This article was based on simulation and later we have demonstrated the experimental results in the following paper: "Optical nanolithography with lamda/15 resolution using bowtie aperture array" (2013) Applied Physics A
Dr Pornsak Srisungsitthisunti
King Mongkut's University of Technology North Bangkok
Read the Original
This page is a summary of: Improving near-field confinement of a bowtie aperture using surface plasmon polaritons, Applied Physics Letters, May 2011, American Institute of Physics,
DOI: 10.1063/1.3595412.
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