High-speed optical FSK demodulator using plasmonic nano bi-dome

An optical frequency-shift-keying demodulator with ultra-small plasmonic nano bi-domes that can filter the coherent optical frequency is developed. Since filtering efficiency depends strongly on the position and number of the plasmonic nano bi-domes in the array, binary Teaching-Learning-Based Optimization (BTLBO) algorithm is proposed to design an array of plasmonic nano bi-domes in order to achieve maximum absorption coefficient spectrum. In BTLBO, a group of learner consists a matrix with binary entries; control the presence (‘1’) or the absence (‘0’) of nano particles in the array.