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Full-Text Articles in Physics
Optimization Of Plasmas For Recombination-Pumped Short-Wavelength Lasers, Michael James Murphy , '98, Catharine Glasheen , '97, Frank Moscatelli, T. D. Donnelly
Optimization Of Plasmas For Recombination-Pumped Short-Wavelength Lasers, Michael James Murphy , '98, Catharine Glasheen , '97, Frank Moscatelli, T. D. Donnelly
Physics & Astronomy Faculty Works
We report on experiments investigating the optimization of laser-ablated plasmas which are used to produce recombination-pumped, short-wavelength lasers. We evaluate the density of electrons and neutral atoms in laser ablated lithium and carbon plasmas as a function of time and distance away from the ablated target surface. We use an interferometric technique which can reveal information about the temperature of the plasma electrons. We find that the cold electrons which result in gain in recombination-pumped lithium lasers on the Lyman-cr transition are produced by the high-intensity pump pulse rather than the lower intensity ablating pulse.
Blue Light Second Harmonic Generation In The Organic Crystal Ortho-Dicyanovinyl-Anisole, Carl H. Grossman, Samuel Aryeh Schulhofer-Wohl , '98, Erik Robert Thoen , '95
Blue Light Second Harmonic Generation In The Organic Crystal Ortho-Dicyanovinyl-Anisole, Carl H. Grossman, Samuel Aryeh Schulhofer-Wohl , '98, Erik Robert Thoen , '95
Physics & Astronomy Faculty Works
Type I phase matched second harmonic generation (SHG) in the organic crystal ortho-Dicyanovinyl-anisole (DIVA) has been measured for a range of near infrared fundamental wavelengths (855-960 nm). Turning curves for type I phase matched SHG were derived from measured refractive index values and show noncritical phase matching at 860. Measured type I phase matched SHG is in close agreement with the calculated results and gives effective SHG coefficients ranging from 1.9 to 5.9 times as large as d(32) Of potassium niobate. (C) 1997 American Institute of Physics.
Point And Line Disclinations In Models Of The Blue Phases, Peter J. Collings
Point And Line Disclinations In Models Of The Blue Phases, Peter J. Collings
Physics & Astronomy Faculty Works
The model of the liquid crystalline blue phases proposed by Alfred Saupe in 1969 is examined in light of the recent, successful theoretical models for these phases. Such an analysis demonstrates that Saupe's model captures all of the important features of the recent models, differing only in the density of line disclinations. The fact that Saupe proposed this model over ten years before the more recent work and without the benefit of a significant amout of new experimental evidence is testimony for his keen physical insight. Such models continue to be useful as researchers direct their attention to the less …
Handbook Of Liquid Crystal Research, Peter J. Collings, J. S. Patel
Handbook Of Liquid Crystal Research, Peter J. Collings, J. S. Patel
Physics & Astronomy Faculty Works
No abstract provided.