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Search Publications by: Kevin O Douglass (Fed)

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Displaying 51 - 57 of 57

Chirped-pulse terahertz spectroscopy for broadband trace gas sensing

April 22, 2011
Author(s)
Eyal Gerecht, Kevin O. Douglass, David F. Plusquellic
We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and heterodyne detectors for the terahertz frequency range have made it possible to generate

Rotationally Resolved Studies of the Exciton Coupled S1/S2 Origin Regions of Diphenylmethane and the d12 Isotopologue

December 9, 2008
Author(s)
David F. Plusquellic, Kevin O. Douglass, Jaime Stearns, Nathan Pillsbury, Timothy Zwier, Christian Muller
Rotationally resolved microwave and ultraviolet spectra of jet-cooled diphenylmethane (DPM) and DPM-d^12 have been obtained in S 0, Sd1 and S2 electronic states using Fourier-transform microwave and UV laser/molecular beam spectrometers. The S0 and S1

THz Investigations of Condensed Phase Biomolecular Systems

October 8, 2008
Author(s)
Kevin O. Douglass, Hailiang Zhang, Susan K. Gregurick, Karen M. Siegrist, David F. Plusquellic
Terahertz (THz) spectroscopic investigations of crystalline dipeptide nanotubes are discussed in the frequency region from 0.6 THz (2 cm-1) to 3 THz (100 cm-1). The THz region provides access to collective modes of biomolecular systems and is therefore