Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

High-Q, low-index-contrast photonic crystal nanofiber cavity for high sensitivity refractive index sensing

Not Accessible

Your library or personal account may give you access

Abstract

We present the design of simultaneous high-quality (Q)-factor and high-sensitivity (S) photonic crystal nanofiber cavities (PCNFCs) made of single silica nanofiber that have a low-index contrast (ratio=1.45). By using the three-dimensional finite-difference time-domain method, two different resonant modes, dielectric mode (DM) and air mode (AM), are designed and optimized to achieve an ultrahigh figure of merit (FOM), respectively. Numerical simulations are performed to study the Q-factors and sensitivities of the proposed PCNFCs. It shows that for both DM- and AM-based PCNFCs, respectively, the Q-factors and sensitivities of Q1.1×107, S=563.6nm/RIU and Q2.1×105, S=736.8nm/RIU can be estimated, resulting in FOMs as high as 4.31×106 and 1.13×105, respectively. To the best of our knowledge, this is the first silica nanofiber cavity geometry that simultaneously features high Q and high S for both DM and AM in PCNFCs. Compared with the state of the art of nanofiber-based cavities, the cavity Q-factor to mode volume (V) ratio (Q/V) in this work has been improved more than two orders of magnitude. The demonstration of a high Q/V cavity in low-index-contrast nanofibers can open up versatile applications using a broad range of functional and flexible fibers. Moreover, due to the extended evanescent field and small mode volumes, the proposed PCNFCs are ideal platforms for remote ultra-sensitive refractive-index-based gas sensing without the need for complicated coupling systems.

© 2018 Optical Society of America

Full Article  |  PDF Article
More Like This
Simultaneously high-Q and high-sensitivity slotted photonic crystal nanofiber cavity for complex refractive index sensing

Chao-Sheng Deng, Ming-Jun Li, Jie Peng, Wen-Liang Liu, and Jian-Xin Zhong
J. Opt. Soc. Am. B 34(8) 1624-1631 (2017)

High-Q, low index-contrast polymeric photonic crystal nanobeam cavities

Qimin Quan, Ian B. Burgess, Sindy K. Y. Tang, Daniel L. Floyd, and Marko Loncar
Opt. Express 19(22) 22191-22197 (2011)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved