The Interaction of Ultraviolet Laser Radiation with Metal and Semiconductor Surfaces


Book Description

The work during this contract period focused on phenomena at nanostructured metal and semiconductor surfaces, which are probed using short-pulse photoemission. Specifically, the program was to investigate the low-dimensional quantum confinement of electrons on spatially-patterned surfaces of single-crystal metals. It also aimed to expand the applications, the technique, and the instrumentation for nonlinear optical techniques of surface electrons. Electronic systems of reduced dimensionality are of interest for a variety of applications for electronic devices. In addition, the thin-film metallic structures that are currently under discussion for magnetic-memory applications, also utilize quantum confinement This investigation has focused on the use of excited-state non-linear spectroscopy as the technique for the probing of electrons on these metal surfaces. In addition, we briefly describe a new technique probing the surfaces of semiconductors at lOOA-length scale under ambient conditions.




Interaction of UV-Laser Radiation with Molecular Surface Films


Book Description

The surface chemistry of Laser Photodeposition has been explored. The findings include the photodissociation physics of organometallics on surfaces and in the gas phase, and the first observation of surface enhanced chemistry. The general objective of this research project is to obtain a clear picture of the basic physics of laser-surface chemical interactions. In pursuit of this general objective, we examined the following specific tasks: a) Demonstrate and understand laser-enhanced surface using both random and collective arrays of metal particles. The reaction will be by ultraviolet photodecomposition. b) Measure and analyze the spectra of methylalkyls and ethylalkyls. Develop and understanding of the shift of the spectra when these molecules are absorbed on passive substrates. c) Experimentally determine the mechanism for the ultraviolet-enhanced etching of semiconductors submerged in aqueous solution.







Research in Progress


Book Description










Ultraviolet Laser Technology and Applications


Book Description

Ultraviolet Laser Technology and Applications is a hands-on reference text that identifies the main areas of UV laser technology; describes how each is applied; offers clearly illustrated examples of UV opticalsystems applications; and includes technical data on optics, lasers, materials, and systems. This book is unique for its comprehensive, in-depth coverage. Each chapter deals with a different aspect of the subject, beginning with UV light itself; moving through the optics, sources, and systems; and concluding with detailed descriptions of applications in various fields. The text enables practicing engineers and researchers to utilize concepts and innovations to solve actual problems encountered in UV optical technology applications. It also offers a wealth of information for equipment designers and manufacturers. Those in laser fields (including medical, electronics, and semiconductors), students, engineers, technicians, as well as newcomers to the subject who require a basic introduction to the topic, will all find Ultraviolet Laser Technology and Applications to be an essential resource. Serves as a valuable, practical reference to UV laser technology Presents detailed technical data and techniques Offers highly illustrated optics designs and beam delivery systems Includes an extensive bibliography, references, and glossary Covers all major UV laser markets and technology systems