Optically generated giant traps in high-purity GaN

Optically programmable excitonic traps

With atomic systems, optically programmed trapping potentials have led to remarkable progress in quantum optics and quantum information science. Programmable trapping potentials could have a similar impact on studies of semiconductor quasi-particles, particularly excitons. However, engineering such potentials inside a semiconductor heterostructure remains an outstanding challenge and optical te...

High Sample Rate Optically Pumped Helium Magnetometer

Optically pumped helium magnetometers are important instruments whichhave many applications in military, mass spectroscopy and space applications. In thispaper, the working principles of helium magnetometers have been explained. There isalso an introduction of a new method for finding the resonant frequency, which hasadvantages to the typical method such as more sample r...

The Role of Deep Level Traps in the Optically Controlled

A numerical solution for the transient photoconductivity in the laser-activated bulk semi-insulating GaAs switch has been obtained, in which the influence of EL2 and other traps on the optical generation rates and the recombination rates of free carriers has been determined. Calculated photocurrent pulses are compared with the experimental results of switching measurements under conditions of l...

Characterization of Near-Surface Traps in Semiconductors: GaN

High purity amphotericin B.

OBJECTIVES Amphotericin B (AmB) is a drug of choice for treatment of disseminated fungal infections, but its use is often associated with severe adverse effects. Our observation that generic formulations of AmB contain multiple polyene components led us to propose that removal of other polyenes would yield a high purity AmB (AmBHP) with an improved therapeutic index. METHODS To test that prem...