Enhancing nonlinear performance of resonant cavities using nonlinear organic monolayers

A. M. Armani

doi:10.1117/12.2657535

15 March 2023 Enhancing nonlinear performance of resonant cavities using nonlinear organic monolayers

A. M. Armani

Proceedings Volume 12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; 124310E (2023) https://doi.org/10.1117/12.2657535
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Nonlinear organic materials, including small molecules and polymers, have enabled numerous advances in flexible photonics and electronics. However, combining these materials with conventional device architectures is challenging due to incompatibilities between CMOS fabrication methods and the delicate nature of organic materials. In the present work, a combination of top-down and bottom-up fabrication methods are used to fabricate integrated optical devices comprised of conventional and unconventional optical materials. The platform device studied here is the silica ultra-high-quality factor (Q) whispering gallery mode optical cavity. Optical resonant cavities are able to store light in circular orbits for long periods of time, resulting in the build-up of large optical fields. Past work has leveraged these build-up powers to demonstrate low threshold Raman lasers. While the optical field is primarily located within the cavity, a small portion forms an evanescent field, interacting with both device surface and the surrounding environment. Therefore, any molecules located on the device surface will interact with the optical field. In the present work, a monolayer of silanes is grafted onto the surface of the cavity. Due to the orientation of the molecules with respect to the circulating optical field, the vibrational Raman mode is excited enabling surface Raman scattering to occur. This behavior improves the efficiency of Raman emissions from the cavity.

Conference Presentation

Citation Download Citation

A. M. Armani "Enhancing nonlinear performance of resonant cavities using nonlinear organic monolayers", Proc. SPIE 12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, 124310E (15 March 2023); https://doi.org/10.1117/12.2657535

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