Packaged whispering gallery resonator device based on an optical nanoantenna coupler

In this work, we present a packaged whispering gallery mode (WGM) device based on an optical nanoantenna as the coupler and a glass microsphere as the resonator. The microspheres were fabricated from either SiO2 fiber or Er3+-doped fiber, the latter creating a WGM laser with a threshold of 93 mu W at 1531 nm. The coupler-resonator WGM device was packaged in a glass capillary. The performance of the packaged microlaser was characterized, with lasing emission both excited in and collected from the WGM cavity via the nanoantenna. The packaged system provides isolation from environmental contamination, a small size, and unidirectional coupling while maintaining a high quality (Q-) factor (similar to 10(8)). (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Automated summary

This work presents a packaged whispering gallery mode (WGM) device using an optical nanoantenna as the coupler and a glass microsphere as the resonator, achieving high-quality lasing emission with environmental isolation and small size.