Analysis of Electrooptic Modulator With 1-D Slotted Photonic Crystal Nanobeam Cavity

Author

Qi, Biao ; Yu, Ping ; Li, Yubo ; Jiang, Xiaoqing ; Yang, Mei ; Yang, Jianyi

Author_Institution

Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China

Volume

23

Issue

14

fYear

2011

fDate

7/15/2011 12:00:00 AM

Firstpage

992

Lastpage

994

Abstract

A new nanocavity-based electrooptic modulator on silicon-on-insulator is proposed. This nanocavity is formed by a one-dimensional photonic crystal nanobeam cavity with a slot embedded. The slot lies in both the cavity and the distributed Bragg reflectors region. This results in an ultrasmall modal volume of 0.047 (λ/n)³ and a high Q-factor of 8.6×10⁴. Another advantage of the structure is that polymers can be infiltrated into the slot. Accordingly, we rely on the fast and strong electrooptic effect of polymers, rather than on the free-carrier plasma dispersion effect of silicon. Analysis shows a modulator with a bandwidth of 86 GHz, a switching voltage of 0.2 V, and a length of only 14 μm can be obtained.

Keywords

Q-factor; distributed Bragg reflectors; electro-optical modulation; integrated optoelectronics; nanophotonics; optical polymers; photonic crystals; silicon-on-insulator; 1D slotted photonic crystal nanobeam cavity; Q-factor; Si; bandwidth 86 GHz; distributed Bragg reflectors; electrooptic modulator; free-carrier plasma dispersion effect; polymers; silicon-on-insulator; size 14 mum; switching voltage; voltage 0.2 V; Cavity resonators; Electrooptic modulators; Electrooptical waveguides; Plastics; Silicon; Electrooptic effects; modulator; photonic crystal; silicon; slot;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2148704

Filename

5759071