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Displaying 43476 - 43500 of 74066

Excitonic Effects on Optical Second-Harmonic Polarizabilities of Semiconductors

January 1, 2002
Author(s)
E K. Chang, Zachary H. Levine, Eric L. Shirley
We present an ab initio many-body formalism for computing the frequency-dependent second-harmonic polarizability of semiconductor materials that includes both local-field and excitonic effects. We calculate the second-harmonic polarizability for AIP, AIAs

Experimental Study of a Water Droplet Impinging on a Liquid Surface

January 1, 2002
Author(s)
Samuel L. Manzello, Jiann C. Yang
An experimental study is presented for water droplet impingement on a liquid surface. The impaction process was recorded using a high-speed digital camera at 1000 frames per second. The initial droplet diameter was fixed at 3.1 mm 0.1 mm and all

Fiber and Component Metrology for High-Speed Communications

January 1, 2002
Author(s)
Tracy S. Clement, Paul D. Hale, Paul A. Williams
Increased data rates require improved measurements. We give specific guidance to avoid measurement pitfalls in two critical high data rate areas: Polarization-mode dispersion and transmitter/receiver frequency response. For audiences familiar (not expert)

Field Test of a Photovoltaic Water Heater

January 1, 2002
Author(s)
Arthur H. Fanney, Brian P. Dougherty, J O. Richardson
A solar photovoltaic water heating system has been installed at the Great Smoky Mountains National Park. The system provides hot water for the restroom facilities at the Park's main visitor center. This paper gives an overview of the technology, describes
Displaying 43476 - 43500 of 74066