Single-mode fiber multi-level all-optical switching using GSST-graphene oxide hybrid thin film structure

Author:

Gan Soon Xin1ORCID,Chew Jing Wen1ORCID,Ng Kok Bin1ORCID,Tey Lian Seng1ORCID,Chong Wu Yi1ORCID,Goh Boon Tong2ORCID,Lai Choon Kong3ORCID,Choi Duk-Yong4ORCID,Madden Steve4ORCID,Ahmad Harith1ORCID

Affiliation:

1. Photonics Research Centre, Department of Physics, University of Malaya 1 , 50603 Kuala Lumpur, Malaysia

2. Low Dimensional Material Research Center, Department of Physics, University of Malaya 2 , 50603 Kuala Lumpur, Malaysia

3. Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney 3 , Camperdown, NSW 2006, Australia

4. Laser Physics Centre, Research School of Physics, The Australian National University 4 , Canberra, ACT 2601, Australia

Abstract

Ge2Sb2Se4Te1 (GSST) exhibits unprecedented broadband transparency over the infrared wavelength range and has emerged as a promising functional material in photonic applications that operate in the optical fiber telecommunication wavelength band. In this work, GSST and graphene oxide (GO) are integrated into an optical fiber link to achieve all-fiber non-volatile multilevel photonic memory. The GSST and GO (GSST-GO) duo-layer hybrid structure is sandwiched between two optical fiber ferrules, where the GO acts as a localized heat source to initiate the phase transition of GSST upon optical excitation. The GSST-GO-coated fiber exhibits a low insertion loss of 0.8 dB and a maximum readout contrast of about 32%, with at least five distinguished memory states. The response time of the device is measured in the range between 2.5 and 9.5 μs. This work serves as a proof of concept on implementing the GSST-GO duo-layer hybrid structure in optical fiber platform to realize all-fiber non-volatile multi-bit channel control or data storage.

Funder

Ministry of Higher Education, Malaysia

Publisher

AIP Publishing

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