Terahertz frequency band wavelength selector

Details Terahertz frequency band wavelength selector Terahertz frequency band wavelength selector

2006-06-06

2006-06-06

Potter, Roy (Department: 2822)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Electromagnetic or particle radiation

C250S341100

Reexamination Certificate

active

07057250

ABSTRACT:
A terahertz (THz) frequency radiation source to emit radiation in a narrow wavelength band within a range of about 3 μm to 3000 μm. This source includes: a broad bandwidth emitter to generate a broad bandwidth emitted wavelength band within the wavelength range; a first planar waveguide optically coupled to the broad bandwidth emitter to transmit the broad bandwidth radiation; a disk resonator evanescently coupled to the first planar waveguide with a resonance wavelength band within the emitted wavelength band; and a second planar waveguide evanescently coupled to the disk resonator to transmit radiation in the narrow wavelength band. The emitted wavelength band has a bandwidth greater than or equal to about 0.01 times a mid-band wavelength. The resonance wavelength band has a resonance wavelength bandwidth of less than or equal to about 0.25 times the emitted bandwidth. The narrow wavelength band is substantially equal to the resonance wavelength band.

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