Whispering Gallery Mode Resonator Surface Functionalization for Active Applications
Proceedings of SPIE. Vol.12569: Nonlinear Optics and Applications XIII 2023
Inga Brice, Vyacheslav Kim, Armands Ostrovskis, Arvids Sedulis, Toms Salgals, Sandis Spolītis, Vjačeslavs Bobrovs, Jānis Alnis, Rashid Ganeev

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.

Atslēgas vārdi
erbium-doped glass | lasing | optical frequency comb | quantum dots | surface functionalization | third harmonic generation | whispering gallery mode (WGM) resonator

Brice, I., Kim, V., Ostrovskis, A., Sedulis, A., Salgals, T., Spolītis, S., Bobrovs, V., Alnis, J., Ganeev, R. Whispering Gallery Mode Resonator Surface Functionalization for Active Applications. No: Proceedings of SPIE. Vol.12569: Nonlinear Optics and Applications XIII, Čehija, Prague, 24.-25. aprīlis, 2023. Bellingham: SPIE, 2023, Article number 125690C. ISBN 9781510662582. ISSN 0277-786X. e-ISSN 1996-756X. Pieejams: doi:10.1117/12.2664936

Publikācijas valoda
English (en)
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