Physics of Stimulated Emission in Blue Semiconductor Lasers

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-w...

Stimulated secondary emission from semiconductor microcavities.

We find strong influence of final-state stimulation on the time-resolved light emission dynamics from semiconductor microcavities after pulsed excitation allowing angle-resonant polariton-polariton scattering on the lower-polariton branch. The polariton dynamics can be controlled by injection of final-state polaritons at densities below a polariton saturation density of 5x10(8) cm(-2). A bosoni...

Active control of emission directionality of semiconductor microdisk lasers

Chapter 4 . Semiconductor Lasers : Device Physics and Applications

Mathew C. Abraham, Professor Rajeev J. Ram There exists a substantial expertise in making extremely precise point-to-point current and potential difference measurements, however, at present there is no technique available to image the flow of currents in devices. Below we report on a preliminary investigation into using a magnetic force microscope (MFM) as a tool to render current contrast images.

Intra-Cavity Second-Harmonic Generation of Blue 460 nm Watt-Level Emission from Optically Pumped Semiconductor Disk Lasers

Experimental results with second-harmonic 460 nm-wavelength emission are presented. A profound analytical description of the intra-cavity beam shaping properties of the resonator based on the ABCD-law provides an effective design tool for the construction of appropriate resonator setups. Also described is the layer design of the optically pumped laser chip in which the fundamental radiation is ...