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Title: Infrared light detection using a whispering-gallery-mode optical microcavity

We demonstrate a thermal infrared (IR) detector based on an ultra-high-quality-factor (Q) whispering-gallery-mode (WGM) microtoroidal silica resonator and investigate its performance to detect IR radiation at 10 μm wavelength. The bandwidth and the sensitivity of the detector are dependent on the power of a probe laser and the detuning between the probe laser and the resonance frequency of the resonator. The microtoroid IR sensor achieved a noise-equivalent-power (NEP) of 7.46 nW, corresponding to an IR intensity of 0.095 mW/cm{sup 2}.
Authors:
; ;  [1]
  1. Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63117 (United States)
Publication Date:
OSTI Identifier:
22267700
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; INFRARED RADIATION; LASERS; OPTICAL MODES; QUALITY FACTOR; RESONATORS; SENSITIVITY; SENSORS