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Updated: May 19, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
A 1.16-μm-radius disk cavity in a sunflower-type circular photonic crystal with ultrahigh quality factor
Xufeng Zhang1, Xiankai Sun, Hong X Tang
1Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.
Abstract:
We present a 1.16-μm-radius disk cavity with ultrahigh quality (Q) factor by embedding the disk into a sunflower-type circular photonic crystal (CPC). The bandgap of the CPC reduces the bending loss of the whispering-gallery mode of the disk, leading to a simulated Q of 10(7), at least an order of magnitude higher than a bare disk of the same size. The design is experimentally verified with a record high loaded Q of 7.4×10(5) measured from an optimized device fabricated on a silicon-on-insulator substrate.

