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High extinction ratio D-shaped fiber polarizers coated by a double graphene/PMMA stack

High extinction ratio D-shaped fiber polarizers coated by a double graphene/PMMA stack
High extinction ratio D-shaped fiber polarizers coated by a double graphene/PMMA stack
We demonstrate theoretically and experimentally a high extinction ratio and compact size TE-pass polarizer made by a D-shaped fiber coated with a double graphene/PMMA stack. The light propagating in the core of the fiber can be efficiently coupled into the graphene sheet thanks to the giant enhancement of the modal evanescent field associated with the high refractive index graphene/PMMA cladding. The strong interaction between the light and graphene produces a large attenuation difference between modes with orthogonal polarizations, resulting in an improved extinction ratio and a reduced insertion loss due to the device compactness. A double graphene/PMMA stack coated polarizer with an extinction ratio of up to 36 dB and an insertion loss of 5 dB has been achieved when the device length is only 2.5 mm. The double graphene/PMMA stack has proved to be significantly better than single graphene/PMMA stack and bilayer graphene/PMMA structures, providing a polarizer with maximum extinction ratio of 44 dB for a length of 4 mm. The achieved results indicate that the proposed high extinction ratio polarizer is a promising candidate for novel in-fiber graphene-based devices.
1094-4087
13278
Chu, Rang
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Guan, Chunying
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Yang, Jing
ca88af37-e909-4faf-a54f-172f757b3ee9
Zhu, Zheng
eebfd713-b179-4218-916c-cee7326a7433
Li, Ping
864f71af-7d0b-40f5-ba22-ec6bac188a81
Shi, Jinhui
1d94402c-0395-4b49-afe6-bede4701accb
Tian, Peixuan
4868b783-add9-425f-9882-baebb5a6beac
Yuan, Libo
0e48503a-1d82-44a0-9ca9-7b90f74097a3
Brambilla, Gilberto
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Chu, Rang
da995ee1-ad3e-4f4a-ab91-cda75fcb53e7
Guan, Chunying
a2d5b5f2-bd7c-4968-8f70-8c0ffdb09948
Yang, Jing
ca88af37-e909-4faf-a54f-172f757b3ee9
Zhu, Zheng
eebfd713-b179-4218-916c-cee7326a7433
Li, Ping
864f71af-7d0b-40f5-ba22-ec6bac188a81
Shi, Jinhui
1d94402c-0395-4b49-afe6-bede4701accb
Tian, Peixuan
4868b783-add9-425f-9882-baebb5a6beac
Yuan, Libo
0e48503a-1d82-44a0-9ca9-7b90f74097a3
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Chu, Rang, Guan, Chunying, Yang, Jing, Zhu, Zheng, Li, Ping, Shi, Jinhui, Tian, Peixuan, Yuan, Libo and Brambilla, Gilberto (2017) High extinction ratio D-shaped fiber polarizers coated by a double graphene/PMMA stack. Optics Express, 25 (11), 13278, [291858]. (doi:10.1364/OE.25.013278).

Record type: Article

Abstract

We demonstrate theoretically and experimentally a high extinction ratio and compact size TE-pass polarizer made by a D-shaped fiber coated with a double graphene/PMMA stack. The light propagating in the core of the fiber can be efficiently coupled into the graphene sheet thanks to the giant enhancement of the modal evanescent field associated with the high refractive index graphene/PMMA cladding. The strong interaction between the light and graphene produces a large attenuation difference between modes with orthogonal polarizations, resulting in an improved extinction ratio and a reduced insertion loss due to the device compactness. A double graphene/PMMA stack coated polarizer with an extinction ratio of up to 36 dB and an insertion loss of 5 dB has been achieved when the device length is only 2.5 mm. The double graphene/PMMA stack has proved to be significantly better than single graphene/PMMA stack and bilayer graphene/PMMA structures, providing a polarizer with maximum extinction ratio of 44 dB for a length of 4 mm. The achieved results indicate that the proposed high extinction ratio polarizer is a promising candidate for novel in-fiber graphene-based devices.

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oe-25-12-13278 - Version of Record
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Accepted/In Press date: 20 May 2017
e-pub ahead of print date: 1 June 2017
Published date: 1 June 2017
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 411911
URI: http://eprints.soton.ac.uk/id/eprint/411911
ISSN: 1094-4087
PURE UUID: 94580b2e-1751-409a-9e7b-fa68e83f7956
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

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Date deposited: 29 Jun 2017 16:31
Last modified: 28 Apr 2022 01:48

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Contributors

Author: Rang Chu
Author: Chunying Guan
Author: Jing Yang
Author: Zheng Zhu
Author: Ping Li
Author: Jinhui Shi
Author: Peixuan Tian
Author: Libo Yuan

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