Polarization of lasing emission in microdisk laser diodes
نویسندگان
چکیده
TE polarization of optical emission from microdisk laser diodes of radius R55 mm, thickness L50.3 mm, is found to dominate both below and above room-temperature lasing threshold current, I th 52 mA. TE emission in the lasing mode at l51560 nm wavelength is due to higher optical gain for TE modes in the quantum well device. In our device geometry, the intrinsic whispering gallery resonances have essentially no polarization selectivity. © 1995 American Institute of Physics.
منابع مشابه
Dynamics of GaAsÕAlGaAs microdisk lasers
Dynamic response of a GaAs/AlGaAs microdisk laser has been experimentally investigated using femtosecond optical pumping. Below the lasing threshold, the delay time of the emission pulse from the microdisk hardly changes with the pump power. Above the lasing threshold, the delay time is shortened dramatically, and it decreases with increasing the pump power. The theoretical simulation based on ...
متن کاملMonolayer excitonic laser
Two-dimensional van der Waals materials have opened a new paradigm for fundamental physics exploration and device applications because of their emerging physical properties. Unlike gapless graphene, monolayer transition-metal dichalcogenides (TMDCs) are two-dimensional semiconductors that undergo an indirect-to-direct bandgap transition1–5, creating new optical functionalities for next-generati...
متن کاملLow-threshold ZnSe microdisk laser based on fluorine impurity bound-exciton transitions
Impurity states in semiconductors, in which two long-lived ground states can be optically coupled to a single excited state, provide a powerful mechanism for applications including lasing without inversion, electromagnetically induced transparency, and optically addressable quantum memory for quantum information processing. We report low-threshold lasing from fluorine-doped ZnMgSe/ZnSe quantum ...
متن کاملTheory of two-dimensional microcavity lasers
Various kinds of devices, such as lasers and musical instruments, utilize stationary-wave oscillations in resonant cavities. In order to maintain stationary oscillation in these devices, nonlinearity is essential in the mechanism for balancing the pumping of the external energy and the decay of the wave of the quasistable state in the resonant cavity. Besides, the interaction between nonlineari...
متن کاملEstimation of the spontaneous emission factor for microdisk lasers via the approximation of whispering gallery modes
Microdisk structures have been used to achieve low-threshold lasing. For these microcavity lasers, the spontaneous emission coupling factor p is an important parameter since it determines the threshold current of the laser. Theoretical calculation of p based on the exact solution of the modes in a microdisk is complicated. A simple, approximate method for solving the waveguide modes and the den...
متن کامل