Single nanobeam optical sensor with a high Q-factor and high sensitivity

Kim, S; Kim, HM; Lee, YH

Single nanobeam optical sensor with a high Q-factor and high sensitivity

Kim, S

Kim, HM Lee, YH

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Publication Type:: Journal Article
Citation:: Optics Letters, 2015, 40 (22), pp. 5351 - 5354
Issue Date:: 2015-11-15

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Field	Value	Language
dc.contributor.author	Kim, S https://orcid.org/0000-0001-9836-3608	en_US
dc.contributor.author	Kim, HM	en_US
dc.contributor.author	Lee, YH	en_US
dc.date.issued	2015-11-15	en_US
dc.identifier.citation	Optics Letters, 2015, 40 (22), pp. 5351 - 5354	en_US
dc.identifier.issn	0146-9592	en_US
dc.identifier.uri	http://hdl.handle.net/10453/119372
dc.description.abstract	© 2015 Optical Society of America. The miniaturization of optical sensors is essential for the realization of compact, portable, and cost-effective devices. Photonic crystal-based optical sensors, which have an ultra-small mode volume and footprint, have demonstrated remarkable recent progress in achieving a high figure-of-merit (FOM) in a sensor. Here, we report an optical sensor with a high Q-factor and high sensitivity based on a photonic crystal nanobeam using the second lowest air band-edge mode. We calculated that a nanobeam (n = 3.4) in a water environment (n = 1.33) has refractive-index sensitivity of ∼631 nm/RIU, while the quality factor is greater than 23,300. Accordingly, a theoretical FOM of the sensor corresponds to >9500. To the best of our knowledge, experimental refractive-index sensitivity of 461 nm/RIU is the highest value among photonic crystal single nanobeam geometry. The simple geometry of uniform air hole sizes and lattice constants in the proposed nanobeam sensor allows easy fabrication and mechanical stability.	en_US
dc.relation.ispartof	Optics Letters	en_US
dc.relation.isbasedon	10.1364/OL.40.005351	en_US
dc.rights	© 2015 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.title	Single nanobeam optical sensor with a high Q-factor and high sensitivity	en_US
dc.type	Journal Article
utslib.citation.volume	22	en_US
utslib.citation.volume	40	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0206 Quantum Physics	en_US
utslib.for	0906 Electrical and Electronic Engineering	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
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	closed_access
pubs.issue	22	en_US
pubs.publication-status	Published	en_US
pubs.volume	40	en_US

Abstract:

© 2015 Optical Society of America. The miniaturization of optical sensors is essential for the realization of compact, portable, and cost-effective devices. Photonic crystal-based optical sensors, which have an ultra-small mode volume and footprint, have demonstrated remarkable recent progress in achieving a high figure-of-merit (FOM) in a sensor. Here, we report an optical sensor with a high Q-factor and high sensitivity based on a photonic crystal nanobeam using the second lowest air band-edge mode. We calculated that a nanobeam (n = 3.4) in a water environment (n = 1.33) has refractive-index sensitivity of ∼631 nm/RIU, while the quality factor is greater than 23,300. Accordingly, a theoretical FOM of the sensor corresponds to >9500. To the best of our knowledge, experimental refractive-index sensitivity of 461 nm/RIU is the highest value among photonic crystal single nanobeam geometry. The simple geometry of uniform air hole sizes and lattice constants in the proposed nanobeam sensor allows easy fabrication and mechanical stability.

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http://hdl.handle.net/10453/119372