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Infrared light emitting diodes efficiency based on GaAs substrate has been limited due to light trapping and total internal reflection of GaAs materials. In this paper we introduced a new method of combining surface plasmonic effect and photonic crystal structure to enhance not only light extraction efficiency but also internal quantum efficiency. Through Finite Difference Time Domain method we found...
We present the simulation results of a method for the quantum cascade detectors (QCD) optical coupling. A metal grating was integrated with a QCD to convert normal-incident electromagnetic (EM) waves into non-normal, higher-order propagating wave (HOPW) and surface plasmon wave (SPW), which contribute to excite the bound-to-bound (BTB) intersubband transition of carriers in the QCD. The presented...
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