The University of Southampton
University of Southampton Institutional Repository

Experimental and theoretical investigation of loss issues in photonic crystal slab waveguide devices

Experimental and theoretical investigation of loss issues in photonic crystal slab waveguide devices
Experimental and theoretical investigation of loss issues in photonic crystal slab waveguide devices
In this paper we demonstrate ultra-low loss transmission across a pholonic crystal super-prism device consisting of 600 lattice periods etched into a slab waveguide at wavelengths both above and below the primary band-gap. By modifying the refractive index of the holes we have reduced overall insertion loss to 4.5 dB across the entire visible region of the spectrum, greatly enhancing transmission and extinction in higher order stop-bands. In addition we show that the remaining loss is predominantly due to impedance mismatch at the boundary between patterned / unpatterned slab waveguide regions and so is no longer proportional to the length of the photonic crystal or the number of lattice periods. This is an important step forward for the realization of functional photonic crystal time delay elements, dispersion compensators and super-prism spectrometer devices. Experimental loss measurements compare extremely well with Finite difference time domain simulations which were used to investigate the effect of etch depth on scattering loss. We find that partial penetration into the underlying buffer region causes massive scattering loss to substrate modes due to loss of waveguiding in the holes.
0819457078
58-66
International Society for Optical Engineering
Charlton, Martin D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Zoorob, Majd E.
5917e55e-58ba-49c6-b801-f9aa1573850a
Netti, Maria C.
3f98b493-5eeb-4d09-a87d-4fa14488534a
Perney, Nicholas M.B.
c3fafd4b-a157-4ae3-bb19-eb2bea0d1dde
Parker, Greg J.
edf88b88-ba05-48a5-8ae4-d6d6aa984364
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Adibi, Ali
Lin, Shawn-Yu
Scherer, Axel
Charlton, Martin D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Zoorob, Majd E.
5917e55e-58ba-49c6-b801-f9aa1573850a
Netti, Maria C.
3f98b493-5eeb-4d09-a87d-4fa14488534a
Perney, Nicholas M.B.
c3fafd4b-a157-4ae3-bb19-eb2bea0d1dde
Parker, Greg J.
edf88b88-ba05-48a5-8ae4-d6d6aa984364
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Adibi, Ali
Lin, Shawn-Yu
Scherer, Axel

Charlton, Martin D.B., Zoorob, Majd E., Netti, Maria C., Perney, Nicholas M.B., Parker, Greg J. and Baumberg, Jeremy J. (2005) Experimental and theoretical investigation of loss issues in photonic crystal slab waveguide devices. Adibi, Ali, Lin, Shawn-Yu and Scherer, Axel (eds.) In Photonic Crystal Materials and Devices III. vol. 5733, International Society for Optical Engineering. pp. 58-66 . (doi:10.1117/12.590417).

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper we demonstrate ultra-low loss transmission across a pholonic crystal super-prism device consisting of 600 lattice periods etched into a slab waveguide at wavelengths both above and below the primary band-gap. By modifying the refractive index of the holes we have reduced overall insertion loss to 4.5 dB across the entire visible region of the spectrum, greatly enhancing transmission and extinction in higher order stop-bands. In addition we show that the remaining loss is predominantly due to impedance mismatch at the boundary between patterned / unpatterned slab waveguide regions and so is no longer proportional to the length of the photonic crystal or the number of lattice periods. This is an important step forward for the realization of functional photonic crystal time delay elements, dispersion compensators and super-prism spectrometer devices. Experimental loss measurements compare extremely well with Finite difference time domain simulations which were used to investigate the effect of etch depth on scattering loss. We find that partial penetration into the underlying buffer region causes massive scattering loss to substrate modes due to loss of waveguiding in the holes.

Full text not available from this repository.

More information

Published date: 30 April 2005
Additional Information: ISSN 0277-786X
Venue - Dates: 3rd Photonic Crystal Materials and Devices Conference, 2005-01-24 - 2005-01-27

Identifiers

Local EPrints ID: 57139
URI: https://eprints.soton.ac.uk/id/eprint/57139
ISBN: 0819457078
PURE UUID: 73c0f108-ae58-4449-bb9c-74bd1eee9656

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 13 Mar 2019 20:34

Export record

Altmetrics

Contributors

Author: Martin D.B. Charlton
Author: Majd E. Zoorob
Author: Maria C. Netti
Author: Nicholas M.B. Perney
Author: Greg J. Parker
Author: Jeremy J. Baumberg
Editor: Ali Adibi
Editor: Shawn-Yu Lin
Editor: Axel Scherer

University divisions

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×