Wavelength shift of transmission resonance by a tapered metallic slit

Abstract

The wavelength shift of transmission resonance was achieved by a tapered metallic slit. We simulated the transmission and reflection of the tapered slit structure with the tapered slit width of 0.25, 0.5, 0.75 and 1 mm. The tapered slit angle shifted higher the resonance frequency, by which the cavity resonant length became shorter.