What is it about?

We demonstrate the design and construction of a device capable to generate a coherent guided flux of hybrid light-matter particles. It is composed by a semiconductor slab that confines the light inside, and 12 "quantum wells" that confine electrons in 2D. When the confined light finds the confined electrons, a quasi-particle with new properties emerges: the so called exciton polariton. By adding two gold gratings a cavity is formed, enabling a phase transition where a coherent population of these hybrid particles is created.

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Why is it important?

Polaritons have shown to be of great interest from both scientific and techonological points of view. They have a unique peculiarity: high coherence from their photonic component with strong mutual interactions from their excitonic one. This feature makes them good candidates for the design of electro-optical devices working in the near infrared regime. The demonstration of polariton-based devices paves the way for a next generation of technologies in which electrons and light are interfaced to boost the performance of the devices.


The configuration showed in this paper allows for the contruction of several on-chip polariton lasers of different features with very well known nano-fabrication techniques.

Daniel Gustavo Suarez Forero
Consiglio Nazionale delle Ricerche

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This page is a summary of: Electrically controlled waveguide polariton laser, Optica, November 2020, Optical Society of America (OSA), DOI: 10.1364/optica.403558.
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