Giant optical nonlinearity interferences in quantum structures (Conference Presentation)

Sarah Houver; Armand Lebreton; Teldo Pereira; Gangyi Xu; Raffaele Colombelli; Iman Kundu; Lianhe Li; Edmund Linfield; Giles Davies; Juliette Mangeney; Jerome Tignon; Robson Ferreira; Sukhdeep Dhillon

doi:10.1117/12.2546443

10 March 2020 Giant optical nonlinearity interferences in quantum structures (Conference Presentation)

Sarah Houver, Armand Lebreton, Teldo Pereira, Gangyi Xu, Raffaele Colombelli, Iman Kundu, Lianhe Li, Edmund Linfield, Giles Davies, Juliette Mangeney, Jerome Tignon, Robson Ferreira, Sukhdeep Dhillon

Author Affiliations +

Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 112780N (2020) https://doi.org/10.1117/12.2546443
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Second-order optical nonlinearities can be greatly enhanced by orders of magnitude in resonantly excited nanostructures. These resonant nonlinearities continually attract attention, particularly in newly discovered materials. However, they are frequently not as heightened as currently predicted, limiting their exploitation in nanostructured nonlinear optics. Here, we present a clear-cut theoretical and experimental demonstration that the second-order nonlinear susceptibility can vary by orders of magnitude as a result of giant destructive, as well as constructive, interference effects in complex systems. Using terahertz quantum-cascade-lasers as a model source to investigate interband and intersubband nonlinearities, we show that these giant interferences are a result of an unexpected interplay of the second-order nonlinear contributions of multiple light and heavy hole states.

Conference Presentation

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Sarah Houver, Armand Lebreton, Teldo Pereira, Gangyi Xu, Raffaele Colombelli, Iman Kundu, Lianhe Li, Edmund Linfield, Giles Davies, Juliette Mangeney, Jerome Tignon, Robson Ferreira, and Sukhdeep Dhillon "Giant optical nonlinearity interferences in quantum structures (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780N (10 March 2020); https://doi.org/10.1117/12.2546443

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KEYWORDS

Nonlinear optics

Nanostructures

Complex systems

Constructive interference

Light

Nanostructuring

Optical engineering

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