Detector Size Relative to Wavelength
critical in determining "coupling efficiency"
much larger than wavelength
- "classical" absorber
- detector is its own "antenna"
- typical figure-of-merit: specific detectivity (D*)
much smaller than wavelength: "micro-detectors"
- very poor coupling
- requires "antenna" structure
- typical figure-of-merit: Noise Equivalent Power (NEP)
- D* (effective area)0.5 / NEP