Now showing items 1-10 of 76
Coherent excitation, incoherent excitation, and adiabatic states
(Physical Review A, 1976-08)
Coherent excitation of an atomic excited state occurs during the propagation of near-resonant light pulses and is responsible for the induced polarization. Simultaneously, incoherent excitation occurs due to the relaxation ...
Carrier dynamics of electrons and holes in moderately doped silicon
(Physical Review B, 1990-06-15)
A time-domain spectroscopic technique, based on the generation and detection of a collimated beam of subpicosecond broadband terahertz pulses, is used to measure the absorption and dispersion of n- and p-type silicon, with ...
Flare coupled metal parallel-plate waveguides for high resolution terahertz time-domain spectroscopy
(Journal of Applied Physics, 2010-03-12)
We report on a new coupling scheme for high resolution terahertz spectroscopy of microcrystalline films using parallel-plate waveguides. Metal flares are used to couple the terahertz radiation into and out of the waveguide. ...
Observation of self-steepening of optical pulses with possible shock formation
(Physical Review Letters, 1973-08-13)
Near-resonant light pulses were steepened by passage through Bb vapor. The rise time changed from typically 4 nsec to less than 1 nsec, and complicated envelopes developed. The self-steepening, well described by adiabatic ...
Doppler-tuned hyperfine spectroscopy of the Lithium ion
(Physical Review Letters, 1978-11-20)
We have used the Doppler-tuned ion-beam, laser-spectroscopy method to measure the hyperfine intervals in the 2^3 S and 2^3 P^o states of Li+. Our resolution was 10 times that of the best previous measurement. In contrast ...
Self-focusing of light by Potassium vapor
(Physical Review Letters, 1970-04-20)
Nonlinear picosecond-pulse propagation through optical fibers with positive group velocity dispersion
(Physical Review Letters, 1981-09-28)
The predictions of the nonlinear Schrodinger equation have been tested by passing 5.5-psec optical pulses through a 70-m single-mode optical fiber. With use of a precise cross correlation technique based on pulse compression, ...
Comment on the relationship between an exact two-photon solution and a two-photon vector model
(Physical Review A, 1977-04)
The exact pulse solution of Brewer and Hahn for optical two-photon transitions is shown to reduce in the adiabatic limit to the two-photon vector model used by Grischkowsky, Loy, and Liao. The connection between the two ...
Echo behavior in ruby
(Physical Review Letters, 1968-01-08)
Self-defocusing of light by adiabatic following in Rubidium vapor
(Physical Review A, 1972-10)
The narrow-line output of a dye laser on the low-frequency side of the 2P1/2 resonance line (7948A) of rubidium was self-defocused by passage through dilute rubidium vapor. The defocusing was caused by the electronic ...