Slow and stopped light in dynamic Moiré gratings
Slow and stopped light in dynamic Moiré gratings
We investigate a theoretical model for a dynamic Moiré grating which is capable of producing slow and stopped light with improved performance when compared with a static Moiré grating. A Moiré grating superimposes two grating periods, which creates a narrow slow light resonance between two band gaps. A Moiré grating can be made dynamic by varying its coupling strength in time. By increasing the coupling strength the reduction in group velocity in the slow light resonance can be improved by many orders of magnitude while still maintaining the wide bandwidth of the initial, weak grating. We show that for a pulse propagating through the grating this is a consequence of altering the pulse spectrum, and therefore the grating can also perform bandwidth modulation. Finally we present a possible realization of the system via an electro-optic grating by applying a quasistatic electric field to a poled χ(2) nonlinear medium.
Maybour, Thomas, Edward
e3103b3b-9f53-4e73-9ecb-df656af19424
Smith, Devin H
49156a41-41f1-4f1b-8ce3-ef6f894e190c
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
6 July 2021
Maybour, Thomas, Edward
e3103b3b-9f53-4e73-9ecb-df656af19424
Smith, Devin H
49156a41-41f1-4f1b-8ce3-ef6f894e190c
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Maybour, Thomas, Edward, Smith, Devin H and Horak, Peter
(2021)
Slow and stopped light in dynamic Moiré gratings.
Physical Review A, 104 (1), [013503].
(doi:10.1103/PhysRevA.104.013503).
Abstract
We investigate a theoretical model for a dynamic Moiré grating which is capable of producing slow and stopped light with improved performance when compared with a static Moiré grating. A Moiré grating superimposes two grating periods, which creates a narrow slow light resonance between two band gaps. A Moiré grating can be made dynamic by varying its coupling strength in time. By increasing the coupling strength the reduction in group velocity in the slow light resonance can be improved by many orders of magnitude while still maintaining the wide bandwidth of the initial, weak grating. We show that for a pulse propagating through the grating this is a consequence of altering the pulse spectrum, and therefore the grating can also perform bandwidth modulation. Finally we present a possible realization of the system via an electro-optic grating by applying a quasistatic electric field to a poled χ(2) nonlinear medium.
Text
210616 dynamic_moire_gratings_paper_resubmitted
- Accepted Manuscript
More information
Submitted date: 22 April 2021
Accepted/In Press date: 23 June 2021
Published date: 6 July 2021
Additional Information:
Funding Information:
The authors acknowledge funding through the UK National Quantum Technologies Programme (EPSRC Grants No. EP/T001062/1 and No. EP/M024539/1) and an EPSRC DTP Ph.D. studentship. We also acknowledge the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work.
Publisher Copyright:
© 2021 American Physical Society.
Identifiers
Local EPrints ID: 451847
URI: http://eprints.soton.ac.uk/id/eprint/451847
ISSN: 1050-2947
PURE UUID: eb3ec1cc-2c88-4d10-bf4e-0d4eed12a7ce
Catalogue record
Date deposited: 01 Nov 2021 17:31
Last modified: 17 Mar 2024 02:55
Export record
Altmetrics
Contributors
Author:
Thomas, Edward Maybour
Author:
Devin H Smith
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics