Patent ID: 11966144
Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
Field: Optics (Instruments)
Classification: CPC G | IPC G  H

Claim 10:
11. A method for modulating the intensity of monochromatic radiation using a dielectric resonator comprising:
a waveguide comprising a planar dielectric slab; and
a periodic grating on the planar dielectric slab, wherein the waveguide supports a vertical Fabry-Perot resonance and the periodic grating supports a qBIC resonance, the supported qBIC resonance having a qBIC resonant frequency corresponding to a peak in the transmission spectrum of the Fabry-Perot resonance; and
an electronically gated or thermally gated absorber material on a surface of the dielectric slab, the absorber material having an electrically tunable absorption at the qBIC resonant frequency,, the method comprising:
illuminating the waveguide with free space radiation at normal incidence to excite the vertical Fabry-Perot resonance and a lateral guided mode resonance at the qBIC resonant frequency, wherein the lateral guided mode resonance and the vertical Fabry Perot resonance couple to produce a Fano resonance having a Lorentzian line shape with a minimum transmittance and a maximum reflectance at the qBIC resonant frequency; and
adjusting a gate bias on the electronically gated absorber material or a temperature of the thermally gated absorber material to modulate the intensity of the qBIC resonance.