| 摘要 |
A refractor for spatially separating multi-frequency radiant energy; the refractor comprises a tapered optical core 501 extending from a base face towards a tip, the core 501 comprising substantially transparent material; a cladding 502 disposed about the core 501, the core 501 and the cladding 502 both being transmissive of light; wherein the core base size is dimensioned to admit radiant energy at frequencies above a cutoff frequency Fmin; and, wherein the cladding 502 is selected to allow radiant energy to exit the core 501 when the radiant energy reaches a critical angle therein, or reaches a resonance or near resonance state within the core; such that energy having higher frequencies will reach the critical angle at increasing distance from the base then energy having lower frequency. Also disclosed is a waveguide based detector comprising; an optical core having an inlet and at least partially comprising a plurality of layers having an aggregate refractive index; at least two of the layers for a photoactive conversion zone; two collectors for collecting electrical energy from the conversion zone; and cladding disposed around the core. Further disclosed is a waveguide based detector comprising: an optical core having an inlet, a plurality of antennas disposed within the optical core for converting light into electrical energy; a cladding disposed around the core, the cladding having a lower refractive index than the aggregate refractive index of the core; and two terminals coupled to the plurality of antennas. |
