Ultra-high Q terahertz whispering-gallery modes in a silicon resonator
Abstract
We report on the first experimental demonstration of terahertz (THz) whispering-gallery modes (WGMs) with an ultra-high quality factor of 1.5 × 104 at 0.62 THz. The WGMs are observed in a high resistivity float zone silicon spherical resonator coupled to a sub-wavelength silica waveguide. A detailed analysis of the coherent continuous wave THz spectroscopy measurements combined with a numerical model based on Mie-Debye-Aden-Kerker theory allows us to unambiguously identify the observed higher order radial THz WGMs.
- Publication:
-
APL Photonics
- Pub Date:
- May 2018
- DOI:
- 10.1063/1.5010364
- arXiv:
- arXiv:1802.00549
- Bibcode:
- 2018APLP....3e1702V
- Keywords:
-
- Physics - Applied Physics;
- Physics - Optics
- E-Print:
- APL Photonics 3 , 051702 (2018)