Comparison of the sensitivity of air and dielectric modes in photonic crystal slab sensors

Tomljenovic-Hanic, S; Rahmani, A; Steel, MJ; De Martijn Sterke, C

Comparison of the sensitivity of air and dielectric modes in photonic crystal slab sensors

Tomljenovic-Hanic, S Rahmani, A

Steel, MJ De Martijn Sterke, C

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Publication Type:: Journal Article
Citation:: Optics Express, 2009, 17 (17), pp. 14552 - 14557
Issue Date:: 2009-08-17

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Field	Value	Language
dc.contributor.author	Tomljenovic-Hanic, S	en_US
dc.contributor.author	Rahmani, A https://orcid.org/0000-0001-7272-9106	en_US
dc.contributor.author	Steel, MJ	en_US
dc.contributor.author	De Martijn Sterke, C	en_US
dc.date.issued	2009-08-17	en_US
dc.identifier.citation	Optics Express, 2009, 17 (17), pp. 14552 - 14557	en_US
dc.identifier.uri	http://hdl.handle.net/10453/9695
dc.description.abstract	Optical cavities provide a route to sensing through the shift of the optical resonant peak. However, effective sensing with optical cavities requires the optimization of the modal quality factor, Q, and the field overlap with the sample, f. For a photonic crystal slab (PCS) this figure of merit, M =fQ, involves two competing effects. The air modes usually have large f but small Q, whereas the dielectric modes have high-Q and small f. We compare the sensitivity of air and dielectric modes for different PCS cavity designs and account for loss associated with absorption by the sensed sample or its host liquid. We find that optimizing Q at the expense f is the most beneficial strategy, and modes deriving from the dielectric bands are thus preferred. ©2009 Optical Society of America.	en_US
dc.relation.ispartof	Optics Express	en_US
dc.relation.isbasedon	10.1364/OE.17.014552	en_US
dc.rights	© 2009 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.	en_US
dc.subject.classification	Optics	en_US
dc.subject.mesh	Silicon	en_US
dc.subject.mesh	Microscopy, Electron, Scanning	en_US
dc.subject.mesh	Crystallization	en_US
dc.subject.mesh	Spectrophotometry, Infrared	en_US
dc.subject.mesh	Biosensing Techniques	en_US
dc.subject.mesh	Air	en_US
dc.subject.mesh	Electronics	en_US
dc.subject.mesh	Algorithms	en_US
dc.subject.mesh	Nanotechnology	en_US
dc.subject.mesh	Photons	en_US
dc.subject.mesh	Nanoparticles	en_US
dc.subject.mesh	Optics and Photonics	en_US
dc.title	Comparison of the sensitivity of air and dielectric modes in photonic crystal slab sensors	en_US
dc.type	Journal Article
utslib.citation.volume	17	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	17	en_US
pubs.publication-status	Published	en_US
pubs.volume	17	en_US

Abstract:

Optical cavities provide a route to sensing through the shift of the optical resonant peak. However, effective sensing with optical cavities requires the optimization of the modal quality factor, Q, and the field overlap with the sample, f. For a photonic crystal slab (PCS) this figure of merit, M =fQ, involves two competing effects. The air modes usually have large f but small Q, whereas the dielectric modes have high-Q and small f. We compare the sensitivity of air and dielectric modes for different PCS cavity designs and account for loss associated with absorption by the sensed sample or its host liquid. We find that optimizing Q at the expense f is the most beneficial strategy, and modes deriving from the dielectric bands are thus preferred. ©2009 Optical Society of America.

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http://hdl.handle.net/10453/9695