Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities

Jiangang Zhu; Sahin Ozdemir; Lina He; Da Ren Chen; Lan Yang

doi:10.1117/12.850451

Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities

Jiangang Zhu, Sahin Ozdemir, Lina He, Da Ren Chen, Lan Yang

Engineering Science and Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Optical microcavities with high quality factors (Q factor) and small mode volumes have shown their potentials in various sensing applications. Here we experimentally demonstrate the real-time detection of single nanoparticles down to 30 nm in radius, using an ultra-high-Q microtoroid on a silicon chip. Mode splitting phenomenon of WGMs caused by their strong interactions with a single nanoparticle is utilized as the sensing signal. Frequency and linewidth information of the split modes is used to accurately derive the size of the particle detected. Theoretical calculations and finite element simulations are in good agreement with the experimental results. The mode splitting technique provides a self-reference scheme that is more immune to noise than the techniques based on the detection of changes of a single mode.

Original language	English (US)
Title of host publication	Photonic Microdevices/Microstructures for Sensing II
Volume	7682
DOIs	https://doi.org/10.1117/12.850451
State	Published - Jun 25 2010
Event	Photonic Microdevices/Microstructures for Sensing II - Orlando, FL, United States Duration: Apr 7 2010 → Apr 8 2010

Other

Other	Photonic Microdevices/Microstructures for Sensing II
Country/Territory	United States
City	Orlando, FL
Period	4/7/10 → 4/8/10

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.850451

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title = "Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities",

abstract = "Optical microcavities with high quality factors (Q factor) and small mode volumes have shown their potentials in various sensing applications. Here we experimentally demonstrate the real-time detection of single nanoparticles down to 30 nm in radius, using an ultra-high-Q microtoroid on a silicon chip. Mode splitting phenomenon of WGMs caused by their strong interactions with a single nanoparticle is utilized as the sensing signal. Frequency and linewidth information of the split modes is used to accurately derive the size of the particle detected. Theoretical calculations and finite element simulations are in good agreement with the experimental results. The mode splitting technique provides a self-reference scheme that is more immune to noise than the techniques based on the detection of changes of a single mode.",

author = "Jiangang Zhu and Sahin Ozdemir and Lina He and Chen, {Da Ren} and Lan Yang",

year = "2010",

month = jun,

day = "25",

doi = "10.1117/12.850451",

language = "English (US)",

isbn = "9780819481467",

volume = "7682",

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note = "Photonic Microdevices/Microstructures for Sensing II ; Conference date: 07-04-2010 Through 08-04-2010",

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TY - GEN

T1 - Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities

AU - Zhu, Jiangang

AU - Ozdemir, Sahin

AU - He, Lina

AU - Chen, Da Ren

AU - Yang, Lan

PY - 2010/6/25

Y1 - 2010/6/25

N2 - Optical microcavities with high quality factors (Q factor) and small mode volumes have shown their potentials in various sensing applications. Here we experimentally demonstrate the real-time detection of single nanoparticles down to 30 nm in radius, using an ultra-high-Q microtoroid on a silicon chip. Mode splitting phenomenon of WGMs caused by their strong interactions with a single nanoparticle is utilized as the sensing signal. Frequency and linewidth information of the split modes is used to accurately derive the size of the particle detected. Theoretical calculations and finite element simulations are in good agreement with the experimental results. The mode splitting technique provides a self-reference scheme that is more immune to noise than the techniques based on the detection of changes of a single mode.

AB - Optical microcavities with high quality factors (Q factor) and small mode volumes have shown their potentials in various sensing applications. Here we experimentally demonstrate the real-time detection of single nanoparticles down to 30 nm in radius, using an ultra-high-Q microtoroid on a silicon chip. Mode splitting phenomenon of WGMs caused by their strong interactions with a single nanoparticle is utilized as the sensing signal. Frequency and linewidth information of the split modes is used to accurately derive the size of the particle detected. Theoretical calculations and finite element simulations are in good agreement with the experimental results. The mode splitting technique provides a self-reference scheme that is more immune to noise than the techniques based on the detection of changes of a single mode.

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DO - 10.1117/12.850451

M3 - Conference contribution

AN - SCOPUS:77953780551

SN - 9780819481467

VL - 7682

BT - Photonic Microdevices/Microstructures for Sensing II

T2 - Photonic Microdevices/Microstructures for Sensing II

Y2 - 7 April 2010 through 8 April 2010

ER -

Optical detection of nanoparticles by mode splitting in whispering-gallery-mode microcavities

Abstract

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