Excitation of whispering gallery modes with a ``point-and-play,'' fiber-based, optical nano-antenna
Abstract
We demonstrate the excitation and detection of whispering gallery modes in optical microresonators using a "point-and-play", fiber-based, optical nano-antenna. The coupling mechanism is based on cavity-enhanced Rayleigh scattering. Collected spectra exhibit Lorentzian dips, Fano shapes, or Lorentzian peaks, with a coupling efficiency around 13\%. The spectra are characterized by the coupling gap, polarization, and fiber tip position. The coupling method is simple, low-cost and, most importantly, the \textit{Q}-factor can be maintained at $10^8$ over a wide coupling range, thereby making it suitable for metrology, sensing, or cavity quantum electrodynamics (cQED) experiments.
- Publication:
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Optics Letters
- Pub Date:
- July 2019
- DOI:
- 10.1364/OL.44.003386
- arXiv:
- arXiv:1901.01496
- Bibcode:
- 2019OptL...44.3386W
- Keywords:
-
- Physics - Optics
- E-Print:
- doi:10.1364/OL.44.003386