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Resonant cavities based on Parity-Time-symmetric diffractive gratings

Resonant cavities based on Parity-Time-symmetric diffractive gratings
Resonant cavities based on Parity-Time-symmetric diffractive gratings
We explore a new class of Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) structures that employ the recently developed concept of Parity-Time (PT) symmetry in optics. The approach is based on using so-called unidirectional Bragg gratings that are non-diffractive (transparent) when illuminated from one side and diffracting (Bragg reflection) when illuminated from the other side, thus providing a uni-directional Bragg functionality. Such unusual property is achieved through diffraction through a grating having periodic variations in both, phase and amplitude. DFB and DBR structures traditionally consist of a gain medium and reflector(s) made via periodic variation of the (gain media) refractive index in the direction of propagation. As such structures are produced in a gain material. It becomes just possible to add periodic amplitude modulation in order to produce the unidirectional Bragg functionality. We propose here new and unique DFB and DBR structures by concatenating two such unidirectional Bragg gratings with their nonreflective ends oriented outwards the cavity. We analyze the transmission and reflection properties of these new structures through a transfer matrix approach. One of the unique characteristics of the structure is that it inherently supports only one lasing mode.
1094-4087
9473-9483
Kulishov, Mykola
8195a009-0031-4252-a375-0963b33849a1
Kress, Bernard
d44a4498-cb10-4910-ae80-0cc68a53834d
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Kulishov, Mykola
8195a009-0031-4252-a375-0963b33849a1
Kress, Bernard
d44a4498-cb10-4910-ae80-0cc68a53834d
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Kulishov, Mykola, Kress, Bernard and Slavík, Radan (2013) Resonant cavities based on Parity-Time-symmetric diffractive gratings. Optics Express, 21 (8), 9473-9483. (doi:10.1364/OE.21.009473).

Record type: Article

Abstract

We explore a new class of Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) structures that employ the recently developed concept of Parity-Time (PT) symmetry in optics. The approach is based on using so-called unidirectional Bragg gratings that are non-diffractive (transparent) when illuminated from one side and diffracting (Bragg reflection) when illuminated from the other side, thus providing a uni-directional Bragg functionality. Such unusual property is achieved through diffraction through a grating having periodic variations in both, phase and amplitude. DFB and DBR structures traditionally consist of a gain medium and reflector(s) made via periodic variation of the (gain media) refractive index in the direction of propagation. As such structures are produced in a gain material. It becomes just possible to add periodic amplitude modulation in order to produce the unidirectional Bragg functionality. We propose here new and unique DFB and DBR structures by concatenating two such unidirectional Bragg gratings with their nonreflective ends oriented outwards the cavity. We analyze the transmission and reflection properties of these new structures through a transfer matrix approach. One of the unique characteristics of the structure is that it inherently supports only one lasing mode.

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More information

Published date: 9 April 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 357303
URI: https://eprints.soton.ac.uk/id/eprint/357303
ISSN: 1094-4087
PURE UUID: 4b2ed487-0b31-40cb-88da-2417ac0b8afa
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 07 Oct 2013 12:26
Last modified: 03 Aug 2019 00:33

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