Coupled whispering gallery mode resonators in the Terahertz frequency range.
We report on coupling of two whispering gallery mode resonators in the Terahertz frequency range. Due to the long wavelength in the millimeter to submillimeter range, the resonators can be macroscopic allowing for accurate size and shape control. This is necessary to couple specific modes of two or more resonators. Sets of polyethylene (PE) and quartz disk resonators are demonstrated, with medium (loaded) quality (Q)-factors of 40-800. Both exhibit coinciding resonance frequency spectra over more than ten times the free spectral range. Loading effects of single resonators are investigated which provide strong Q-factor degradation and red-shifts of the resonances in the 0.2% range. By coupling two resonators of the same size, we observe mode splitting, in very good agreement with our numerical calculations.
Max Planck Research Group, Institute for Optics, Information and Photonics, University of Erlangen-Nürnberg, D-91058 Erlangen, Germany. spreu@optik.uni-erlangen.de
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Preu
H G L
HG
Schwefel
S
S
Malzer
G H
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Döhler
L J
LJ
Wang
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M
Hanson
J D
JD
Zimmerman
A C
AC
Gossard
D003198:Computer Simulation; D004581:Electronics; D004867:Equipment Design; D007834:Lasers; D008422:Materials Testing; D008962:Models, Theoretical; D017785:Photons; D010969:Plastics; D020959:Polyethylene / Q000737:chemistry*; D011791:Quartz; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D013696:Temperature; D014159:Transducers
D010969:Plastics; D011791:Quartz; D020959:Polyethylene