Open AccessFabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam
Author(s) -
Hideaki Takashima,
Atsushi Fukuda,
Hironaga Maruya,
Toshiyuki Tashima,
Andreas W. Schell,
Shigeki Takeuchi
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.006792
Subject(s) - materials science , fabrication , optics , focused ion beam , optoelectronics , beam (structure) , optical fiber , photonics , ion beam , ion , physics , medicine , alternative medicine , pathology , quantum mechanics
Nanofiber Bragg cavities (NFBCs) are solid-state microcavities fabricated in an optical tapered fiber. NFBCs are promising candidates as a platform for photonic quantum information devices due to their small mode volume, ultra-high coupling efficiencies, and ultra-wide tunability. However, the quality (Q) factor has been limited to be approximately 250, which may be due to limitations in the fabrication process. Here we report high Q NFBCs fabricated using a focused helium ion beam. Whenan NFBC with grooves of 640 periods is fabricated, the Q factor is over 4170, which is more than 16 times larger than that previously fabricated using a focused gallium ion beam.