Zobrazeno 1 - 10
of 142
pro vyhledávání: '"William R. Donaldson"'
Publikováno v:
IEEE Journal of Quantum Electronics. 59:1-8
Publikováno v:
IEEE Transactions on Electron Devices. 69:6859-6864
Publikováno v:
Physical Review A. 107
Publikováno v:
Gallium Nitride Materials and Devices XVIII.
Publikováno v:
IEEE Journal of Quantum Electronics. 57:1-8
Fast aluminum-gallium-nitride–based metal–semiconductor–metal ultraviolet photodiodes were successfully designed, fabricated, and characterized using conventional photolithography techniques. Various electrode geometries were fabricated to inve
Publikováno v:
Gallium Nitride Materials and Devices XVII.
Autor:
Yiming Zhao, William R. Donaldson
Publikováno v:
IEEE Journal of Quantum Electronics. 56:1-7
Aluminum-gallium-nitride photodetectors were successfully fabricated with micrometer-scale metal–semiconductor–metal structures and tested with ultrafast, UV laser pulses. The measurements were done with single-shot oscilloscopes. Pulse-broadenin
Publikováno v:
Conference on Lasers and Electro-Optics.
An optical pulse can be reflected at a moving boundary of refractive index change formed by a strong pump pulse. We discuss the theory and possible applications of this effect.
Publikováno v:
Optics letters. 46(16)
We investigate the impact of the finite rise time of a spatiotemporal boundary inside a dispersive medium used for reflection and refraction of optical pulses. We develop a matrix approach in the frequency domain for analyzing such spatiotemporal bou
Autor:
Yiming Zhao, William R. Donaldson
Publikováno v:
IEEE Transactions on Electron Devices. 65:4441-4447
The influence of aluminum composition (Al%) nonuniformity on AlGaN metal–semiconductor–metal photodetectors was thoroughly studied on a device level. The Al% fluctuation was precisely measured by X-ray photoelectron spectroscopy and mapped by ene