TY - JOUR T1 - Compare differential quantum efficiency in single cavity with coupled photonic crystal nanocavity array laser. TT - مقایسه راندمان دیفرانسیلی کوانتومی در لیزر بلور فوتونی تک کاواک با آرایه ای از نانوکاواک های جفت شده JF - opsi JO - opsi VL - 21 IS - 0 UR - http://opsi.ir/article-1-620-en.html Y1 - 2015 SP - 449 EP - 452 KW - Gain Laser KW - Differential Quantum Efficiency KW - Spontaneous Emission-Coupling Factor KW - Photonic Crystal Laser KW - Laser Rate Equations N2 - Abstract- - In this paper, a type of laser which consists of an array of Coupled-Photonic-Crystal-Nanocavities is considered. This laser has a lower threshold power and higher differential quantum efficiency in comparison with a Single-Cavity Photonic Crystal laser. In order to investigate the differential quantum efficiency, first the laser rate equations are calculated. After that, they are evaluated in the steady state. Then, the differential quantum efficiency of Single-Cavity laser is compared with that of Photonic-Crystal laser array. M3 ER -