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Broadband focusing grating couplers for suspended-membrane waveguides

Broadband focusing grating couplers for suspended-membrane waveguides
Broadband focusing grating couplers for suspended-membrane waveguides
We propose and demonstrate broadband focusing grating couplers for suspended-membrane waveguides on silicon-on-insulator both in near-infrared (near-IR) and in mid-IR wavelength range. Finite-difference time-domain simulation predicts similar to 100 nm 3 dB bandwidth with -1.7 dB coupling efficiency for an apodized grating in near-IR. -3.5 dB maximum coupling efficiency and similar to 90 nm 3 dB bandwidth are realized experimentally. In mid-IR, -5.5 dB maximum coupling efficiency from a uniform focusing grating is measured at 2.75 µm, and similar to 500 nm 3 dB bandwidth is predicted theoretically.
0146-9592
5181-5183
Cheng, Zhenzhou
3f15783f-7ba2-4235-9f07-8130fc78ac0f
Chen, Xia
64f6ab92-ca11-4489-8c03-52bc986209ae
Yan Wong, Chi
63a9bac7-fed9-49e6-b1ac-caf7742c388f
Xu, Ke
283b7469-7b53-403f-9583-2c95e7377969
Ki Tsang, Hon
2d37c836-adea-4a0b-96fe-2b3ea335f84a
Cheng, Zhenzhou
3f15783f-7ba2-4235-9f07-8130fc78ac0f
Chen, Xia
64f6ab92-ca11-4489-8c03-52bc986209ae
Yan Wong, Chi
63a9bac7-fed9-49e6-b1ac-caf7742c388f
Xu, Ke
283b7469-7b53-403f-9583-2c95e7377969
Ki Tsang, Hon
2d37c836-adea-4a0b-96fe-2b3ea335f84a

Cheng, Zhenzhou, Chen, Xia, Yan Wong, Chi, Xu, Ke and Ki Tsang, Hon (2012) Broadband focusing grating couplers for suspended-membrane waveguides. Optics Letters, 37 (24), 5181-5183. (doi:10.1364/OL.37.005181).

Record type: Article

Abstract

We propose and demonstrate broadband focusing grating couplers for suspended-membrane waveguides on silicon-on-insulator both in near-infrared (near-IR) and in mid-IR wavelength range. Finite-difference time-domain simulation predicts similar to 100 nm 3 dB bandwidth with -1.7 dB coupling efficiency for an apodized grating in near-IR. -3.5 dB maximum coupling efficiency and similar to 90 nm 3 dB bandwidth are realized experimentally. In mid-IR, -5.5 dB maximum coupling efficiency from a uniform focusing grating is measured at 2.75 µm, and similar to 500 nm 3 dB bandwidth is predicted theoretically.

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More information

Accepted/In Press date: November 2012
e-pub ahead of print date: 12 December 2012
Published date: 15 December 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 378481
URI: https://eprints.soton.ac.uk/id/eprint/378481
ISSN: 0146-9592
PURE UUID: 4432452b-9d5a-4ee7-b45f-c86757e2f3c3
ORCID for Xia Chen: ORCID iD orcid.org/0000-0002-0994-5401

Catalogue record

Date deposited: 29 Jun 2015 10:50
Last modified: 19 Nov 2019 01:37

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