Patent ID: 9740031
Date: 2017-08-22
CPC Classifications: G02F

Claim:
1. A method for coherent perfect absorption (CPA) with an incoherent optical radiation input, comprising: providing a lossy, dielectric thin film characterized by an intrinsic optical absorption over an at least one octave bandwidth; providing a resonator structure in which the lossy, dielectric thin film is disposed, wherein the resonator structure comprises two, multi-layer, aperiodic dielectric mirrors characterized by a reflectivity amplitude that increases in-step with increasing wavelength over the at least one octave bandwidth; and inputting a single incoherent optical beam having a spectrum over the at least one octave bandwidth to one of a left side and a right side of the resonator structure, wherein the lossy, dielectric thin film is characterized by an effective optical absorption over the at least one octave bandwidth that is greater than the intrinsic optical absorption over the at least one octave bandwidth.