Whispering gallery mode resonator surface functionalization for active applications

Inga Brice; Vyacheslav V. Kim; Armands Ostrovskis; Arvīds Sedulis; Toms Salgals; Sandis Spolitis; Vjaceslavs Bobrovs; Janis Alnis; Rashid A. Ganeev

doi:10.1117/12.2664936

5 June 2023 Whispering gallery mode resonator surface functionalization for active applications

Inga Brice, Vyacheslav V. Kim, Armands Ostrovskis, Arvīds Sedulis, Toms Salgals, Sandis Spolitis, Vjaceslavs Bobrovs, Janis Alnis, Rashid A. Ganeev

Author Affiliations +

Proceedings Volume 12569, Nonlinear Optics and Applications XIII; 125690C (2023) https://doi.org/10.1117/12.2664936
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

In recent years whispering gallery mode (WGM) resonators have attracted interest due to their various potential passive (filters, resonators, sensors) and active (lasers, four-wave mixing) applications. By choosing an appropriate material with very low absorption, and fabricating a very smooth surface, WGM resonators can reach ultra-high quality (Q) factors. Additionally, the surface of the WGM resonator can be functionalized with nanoparticles or nanomaterial layers, which can enhance optical properties. Recently, we have been interested in the functionalization of the WGM resonator surface for active applications. WGM resonators are suitable for nonlinear optical interactions due to their ultra-high Q factors, significantly lowering necessary pumping power. WGM resonators can be used to generate optical frequency combs (OFCs), which have many applications in optical clocks, spectroscopy, and communications. After coating WGM resonator with quantum dots, besides the OFC generation, we have observed the third harmonic generation. Functionalization with erbium ions leads to the observation of lasing.

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Citation Download Citation

Inga Brice, Vyacheslav V. Kim, Armands Ostrovskis, Arvīds Sedulis, Toms Salgals, Sandis Spolitis, Vjaceslavs Bobrovs, Janis Alnis, and Rashid A. Ganeev "Whispering gallery mode resonator surface functionalization for active applications", Proc. SPIE 12569, Nonlinear Optics and Applications XIII, 125690C (5 June 2023); https://doi.org/10.1117/12.2664936

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