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      Light-controlled microwave whispering-gallery-mode quasi-optical resonators at 50W LED array illumination

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      Author
      Yurchenko V.B.
      Ciydem, M.
      Altintas, A.
      Date
      2015
      Source Title
      AIP Advances
      Print ISSN
      21583226
      Publisher
      American Institute of Physics Inc.
      Volume
      5
      Issue
      8
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We present experimental observations of light-controlled resonance effects in microwave whispering-gallery-mode quasi-optical dielectric-semiconductor disk resonators in the frequency band of 5 GHz to 20 GHz arising due to illumination from a light emitting diode (LED) of 50W power range. We obtain huge enhancement of photo-sensitivity (growing with the resonator Q-factor) that makes light-microwave interaction observable with an ordinary light (no laser) at conventional brightness (like an office lighting) in quasi-optical microwave structures at rather long (centimeter-scale) wavelength. We also demonstrate non-conventional photo-response of Fano resonances when the light suppresses one group of resonances and enhances another group. The effects could be used for the optical control and quasi-optical switching of microwave propagation through either one or another frequency channel. © 2015 Author(s).
      Keywords
      Frequency bands
      Microwave resonators
      Microwaves
      Optical resonators
      Q factor measurement
      Resonance
      Resonators
      Whispering gallery modes
      Centimeter-scale
      Frequency channels
      Microwave interactions
      Microwave propagation
      Optical control
      Quasi-optical resonator
      Resonance effect
      Resonator Q-factor
      Light emitting diodes
      Permalink
      http://hdl.handle.net/11693/21403
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.4928868
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      • Department of Electrical and Electronics Engineering 3524
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