Mechanisms for photon sorting based on slit–groove arrays

Abstract

Abstract. Mechanisms for one-dimensional photon sorting are theoretically studied in the framework of a couple mode method. The considered system is a nanopatterned structure composed of two different pixels drilled on the surface of a thin gold layer. Each pixel consists of a slit-groove array designed to squeeze a large fraction of the incident light into the central slit. The Double-Pixel is optimized to resolve two different frequencies in the near infrared. This system shows a high transmission efficiency and a small crosstalk. Its response is found to strongly depend on the effective area shared by overlapping pixels. Three different regimes for the process of photon sorting are identified and the main physical trends underneath in such regimes are unveiled. Optimal efficiencies for the photon sorting are obtained for a moderate number of grooves that overlap with grooves of the neighbor pixel. Results could be applied to optical and infrared detectors.

A Visible - Infrared Compatible Camouflage Photonic Crystal with Enhanced Emission in 5~8 μm

“…To prepare a D/M/D film of a high emission in 5~8 μm, we will introduce a 2D periodic aperture array into this film to utilize the extraordinary optical transmission (EOT). The EOT has been a very active research field [21][22][23][24][25][26][27] since its discovery through nanoscale apertures in metallic films in 1998 [19,20], leading to its application in sensing [28][29][30][31][32][33], spectroscopic devices [34,35], perfect absorbers [36,37], color filters [38][39][40][41], metamaterials [42][43][44][45][46], lenses [47], optical trapping [48][49][50], enhancement of nonlinear effects [51][52][53], etc. Thanks to the periodic subwavelength aperture array, coupled effect occurs between the incident electromagnetic wave and aperture array, leading to a wavelength-selective transmission at frequencies below the first onset of diffraction with higher efficiencies than that expected for subwavelength apertures [19][20][21][22][23][24][25][26]…”