@inproceedings{ca8bdfb408e94117a40f921932de2e02,
title = "Whispering gallery mode resonator surface functionalization for active applications",
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.",
keywords = "third harmonic generation, quantum dots, whispering gallery mode (WGM) resonator, surface functionalization, erbium-doped glass, optical frequency comb, lasing",
author = "Inga Brice and Kim, \{Vyacheslav V.\} and Armands Ostrovskis and Arvīds Sedulis and Toms Salgals and Sandis Spolitis and Vjaceslavs Bobrovs and Jānis Alnis and Ganeev, \{Rashid A.\}",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.",
year = "2023",
doi = "10.1117/12.2664936",
language = "English",
isbn = "978-151066258-2",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Mario Bertolotti and \{Anatoly V.\}, Zayats and \{Alexei M.\}, Zheltikov",
booktitle = "Nonlinear Optics and Applications XIII",
address = "United States",
}