Three-wave mixing experiments in indium–tin–oxide thin-films with no phase matching

2024/07/25 by Kyle Wynne, Marjan Bazian, Mark C. Harrison · 1 voice · 1 citation
Physics and Astronomy · Materials Science · #Photorefractive and Nonlinear Optics #Phase-change materials and chalcogenides #Liquid Crystal Research Advancements

paper · doi:10.1088/2515-7647/ad6799

openalex publication_date 2024/07/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/09

Abstract

Abstract One challenge of using nonlinear optical phenomena for practical applications is the need to perform phase-matching. Recently, epsilon-near-zero materials have been shown to demonstrate strong optical nonlinearities, in addition to their other unique properties. As suggested by their name, the permittivity of the material is close to zero for a certain wavelength range. We demonstrate that this small permittivity allows for efficient three-wave mixing interactions to take place in indium–tin–oxide thin films without the need for phase matching the pump and signal beams. The efficiency of the second-order nonlinear interactions is characterized, and cascaded three-wave mixing is demonstrated.

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Discussions

• Very happy that, after a long wait for reviews, our work on three-wave mixing in an ENZ material without phase matching was accepted for publication. We coupled light into a thin film propagating mode [bsky, 2 points, 0 comments]

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