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Search Publications by: Thomas W. LeBrun (Fed)

Displaying 26 - 30 of 30

Virtual Environment for Manipulating Microscopic Particles with Optical Tweezer

June 1, 2003

Author(s)

Yong-Gu Lee, Kevin W. Lyons, Thomas W. LeBrun

In this paper, we use virtual reality techniques to define an intuitive interface to a nanoscale manipulation device. This device utilizes optical methods to focus laser light to trap and reposition nano-to-microscopic particles. The underlying physics are

Micro-Mirror Array Control of Optical Tweezer Trapping Beams

August 28, 2002

Author(s)

Nicholas Dagalakis, Thomas W. LeBrun, J Lippiatt

The efficiency of optical tweezer manufacturing depends on the number of trapping beams available. Micro optics technology offers the opportunity to significantly increase the number of trapping beams without a significant increase of the cost or size of

X-ray Scattering and Fluorescence From Atoms and Molecules

January 1, 2000

Author(s)

S H. Southworth, L Young, E P. Kanter, Thomas W. LeBrun

Fundamental understanding of x-ray interactions with atoms and molecules provides a basis for applying x-ray methods to complex materials, such as structural determinations by x-ray diffraction and extended x-ray absorption fine structure. Compton

Radiationless Resonant Raman Scattering at the Ar K Edge

January 1, 1999

Author(s)

Thomas W. LeBrun, S H. Southworth, G B. Armen, M A. MacDonald, Y Azuma

Partial cross sections for Ar K-LZL3(1 D2)np, n=4 and 5 spectator Auger states excited by x-ray absorption across the K-edge were measured and compared with calculations based on the theory or radiationless resonant Raman scattering. Core relaxation and

Optical trapping of selected dielectric microparticles in air

Author(s)

Haesung Park, Thomas W. LeBrun

We demonstrate a method to trap a selected dielectric microparticle in air using radiation pressure from a single-beam gradient optical trap. Randomly scattered dielectric microparticles adhered to a glass substrate are momentarily detached using