Semiconductor Lasers: Device Physics and Applications

• Demonstration of an enhancement in the modulation bandwidth from 16 GHz to 28 GHz in an injection locked semiconductor laser with a coincident reduction in parasitic chirp. • Demonstration of room-temperature, continuous-wave operation of the first bipolar cascade laser. This laser demonstrated an internal efficiency of 150% and a measured external modulation efficiency of 99.3%. Continuous-wave lasing was realized up to 80 C. • Demonstration of continuous-wave lasing from a DFB laser fabricated using precision xray lithography and low-temperature crystal overgrowth. • Demonstration of record high fidelity signal transmission using a multimode vertical cavity surface emitting laser. • Development of a theory for the modulation and noise in an intersubband laser. • Design of a semiconductor laser that exploits evaporative cooling of electrons. • Development of a comprehensive Monte Carlo simulation of spin dephasing in a doped semiconductor. Development of a femtosecond pump-probe experiment and the measurement of the spin relaxation in GaAs. • Demonstration of interaction effects between nanomagnets in dense magnetic media (60 Gb/in2). Array antiferromagnetism was observed for the first time by magnetic force microscopy.