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Polarization rotation and mode splitting in photonic crystal line-defect waveguides

Polarization rotation and mode splitting in photonic crystal line-defect waveguides
Polarization rotation and mode splitting in photonic crystal line-defect waveguides
In a line-defect waveguide of a planer photonic crystal (PhC), we found a new rotational state of polarised light, which exhibits ‘polarisation rotation’ on the PhC plane, when a phase mismatch m was added to the air-hole alignment of the waveguide, where mode splitting was simultaneously observed in the dispersion curve. To account for the polarisation rotation together with the mode splitting, we propose a two-state model that is constructed from Schro¨dinger equation obtained from the equation for electromagnetic waves. The proposed two-state model gives an explanation on the relation between the polarisation-rotational angle q and the mismatch m and on its rotational direction (i.e., clockwise or anticlockwise direction) that depends on the mode. Using the two-state model, we also discuss the angular momenta of the polarised light in the PhC waveguide, which are directly related to the Stokes parameters that characterise the polarisation rotations.
Sotto, Moise, Sala Henri
2e7797fc-4433-4513-bd08-03ab7839452c
Tomita, Isao
e4a78ed2-f525-4fb0-9711-86e2b2dd5587
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc
Sotto, Moise, Sala Henri
2e7797fc-4433-4513-bd08-03ab7839452c
Tomita, Isao
e4a78ed2-f525-4fb0-9711-86e2b2dd5587
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc

Sotto, Moise, Sala Henri, Tomita, Isao, Debnath, Kapil and Saito, Shinichi (2018) Polarization rotation and mode splitting in photonic crystal line-defect waveguides. Frontiers in Materials, 6 (85).

Record type: Article

Abstract

In a line-defect waveguide of a planer photonic crystal (PhC), we found a new rotational state of polarised light, which exhibits ‘polarisation rotation’ on the PhC plane, when a phase mismatch m was added to the air-hole alignment of the waveguide, where mode splitting was simultaneously observed in the dispersion curve. To account for the polarisation rotation together with the mode splitting, we propose a two-state model that is constructed from Schro¨dinger equation obtained from the equation for electromagnetic waves. The proposed two-state model gives an explanation on the relation between the polarisation-rotational angle q and the mismatch m and on its rotational direction (i.e., clockwise or anticlockwise direction) that depends on the mode. Using the two-state model, we also discuss the angular momenta of the polarised light in the PhC waveguide, which are directly related to the Stokes parameters that characterise the polarisation rotations.

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In preparation date: 23 April 2018
Accepted/In Press date: 23 July 2018
e-pub ahead of print date: 14 August 2018

Identifiers

Local EPrints ID: 420212
URI: http://eprints.soton.ac.uk/id/eprint/420212
PURE UUID: ae2f81bb-27ad-4705-bcaa-c1b39118a3ed
ORCID for Shinichi Saito: ORCID iD orcid.org/0000-0003-1539-1182

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Date deposited: 02 May 2018 16:30
Last modified: 07 Oct 2020 03:37

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