Research@StAndrews
 
The University of St Andrews

Research@StAndrews:FullText >
University of St Andrews Research >
University of St Andrews Research >
University of St Andrews Research >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10023/2874
This item has been viewed 12 times in the last year. View Statistics

Files in This Item:

File Description SizeFormat
PortalupiPhysRevBDeliberateVsIntrinsicDisorder2011.pdf1.07 MBAdobe PDFView/Open
Title: Deliberate versus intrinsic disorder in photonic crystal nanocavities investigated by resonant light scattering
Authors: Portalupi, S. L.
Galli, M.
Belotti, M.
Andreani, L. C.
Krauss, Thomas Fraser
O'Faolain, Liam
Keywords: PROPAGATION
SLABS
WAVE-GUIDES
QC Physics
Issue Date: 12-Jul-2011
Citation: Portalupi , S L , Galli , M , Belotti , M , Andreani , L C , Krauss , T F & O'Faolain , L 2011 , ' Deliberate versus intrinsic disorder in photonic crystal nanocavities investigated by resonant light scattering ' Physical Review B , vol 84 , no. 4 , 045423 .
Abstract: We report a study of photonic crystal nanocavities as a function of lattice disorder, which is implemented by deliberate radius variations of the holes forming the photonic crystal. Using cross-polarized laser light scattering, we demonstrate that lattice disorder affects the cavity mode symmetry, as is crucially evidenced by measuring scattering resonances for different sample orientations and explained by group-theoretical analysis together with calculations of the mode profile. We also quantify how the increase of lattice disorder leads to a reduction of the cavity Q factors and to a spread of both Q factors and resonance wavelengths. The trends as a function of disorder and for different radii distributions are well reproduced by theoretical calculations when both intentional (deliberate) and intrinsic (residual) disorder are taken into account. The results shed light on the effects of disorder on cavity resonances and on the interplay between intentional and intrinsic disorder, yielding reliable estimations of residual disorder (which ultimately affects technology limits) from optical measurements. Interestingly, the disorder values derived from the variation of the Q factor are lower than those derived from the wavelength spread: this suggests the occurrence of subtle interhole correlation effects that turn out to be beneficial for cavity Q factors.
Version: Publisher PDF
Status: Peer reviewed
URI: http://hdl.handle.net/10023/2874
DOI: http://dx.doi.org/10.1103/PhysRevB.84.045423
ISSN: 1098-0121
Type: Journal article
Rights: ©2011 American Physical Society
Appears in Collections:University of St Andrews Research
Physics & Astronomy Research



This item is protected by original copyright

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

DSpace Software Copyright © 2002-2012  Duraspace - Feedback
For help contact: Digital-Repository@st-andrews.ac.uk | Copyright for this page belongs to St Andrews University Library | Terms and Conditions (Cookies)