Estimation of Purcell factor from mode-splitting spectra in an optical microcavity

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033817· OSTI ID:21541374

Oezdemir, Sahin Kaya; Jiangang, Zhu; He, Lina; Yang, Lan ^[1]

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1. Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130 (United States)

We investigate scattering process in an ultrahigh-Q optical microcavity coupled to subwavelength scatterers by introducing splitting quality Q{sub sp}, a dimensionless parameter defined as the ratio of the scatterer-induced mode splitting to the total loss of the coupled system. A simple relation is introduced to directly estimate the Purcell factor from single-shot measurement of transmission spectrum of scatterer-coupled cavity. Experiments with polystyrene (PS) and gold (Au) nanoparticles, erbium ions, and Influenza A virions show that Purcell-factor-enhanced preferential funneling of scattering into the cavity mode takes place regardless of the scatterer type. Experimentally determined highest Q{sub sp} for single PS and Au nanoparticles are 9.4 and 16.19 corresponding to Purcell factors with lower bounds of 353 and 1049, respectively. The highest observed Q{sub sp} was 31.2 for an ensemble of Au particles. These values are the highest Q{sub sp} and Purcell factors reported up to date.

• OSTI ID: 21541374
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033817; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
CAVITY RECEIVERS
ERBIUM IONS
GOLD
INFLUENZA VIRUSES
NANOSTRUCTURES
PARTICLES
POLYSTYRENE
SCATTERING
SPECTRA
TRANSMISSION
CHARGED PARTICLES
ELEMENTS
IONS
MATERIALS
METALS
MICROORGANISMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARASITES
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
SOLAR RECEIVERS
SYNTHETIC MATERIALS
TRANSITION ELEMENTS
VIRUSES