Now showing items 1-20 of 530

    • Echo behavior in ruby 

      Grischkowsky, Daniel R.; Hartmann, S. R. (American Physical Society, 1968-01-08)
    • Self-focusing of light by potassium vapor 

      Grischkowsky, Daniel R. (American Physical Society, 1970-04-20)
      Raman-shifted ruby-laser light on the high-frequency side of the 2P3/2 resonance line (7665 A) of potassium was self-focused by a dilute potassium gas.
    • Behavior of electron-spin echoes and photon echoes in high fields 

      Grischkowsky, Daniel R.; Hartmann, S. R. (American Physical Society, 1970-07-01)
      The amplitude of the electron-spin or photon echo from an ensemble of isolated atoms (echo atoms) interacting with magnetic-nuclear neighbors is calculated as a function of the magnitude and the orientation of an applied ...
    • Self-defocusing of light by adiabatic following in Rubidium vapor 

      Grischkowsky, Daniel R.; Armstrong, J. A. (American Physical Society, 1972-10)
      The narrow-line output of a dye laser on the low-frequency side of the 2P1/2 resonance line (7948 A) of rubidium was self-defocused by passage through dilute rubidium vapor. The defocusing was caused by the electronic ...
    • Adiabatic following and slow optical pulse propagation in Rubidium vapor 

      Grischkowsky, Daniel R. (American Physical Society, 1973-06)
      Short pulses of narrow-line low-intensity dye-laser light nearly resonant with the Zeeman-split 2P1/2 esonance line (7948 A) of rubidium were observed to propagate through dilute rubidium vapor as slowly as (1/14)c. These ...
    • Observation of self-steepening of optical pulses with possible shock formation 

      Grischkowsky, Daniel R.; Courtens, Eric; Armstrong, J. A. (American Physical Society, 1973-08-13)
      Near-resonant light pulses were steepened by passage through Rb 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 ...
    • Optical pulse compression 

      Grischkowsky, Daniel R. (AIP Publishing, 1974-11-15)
      Dramatic and controllable reshaping of frequency-modulated dye laser pulses has been observed. The pulses, nearly resonant with the 2P1/2 line (7948 A) of Rb, first passed through a LiNbO3 frequency modulator, and then ...
    • Theory of the dispersive modulator 

      Grischkowsky, Daniel R.; Loy, M. M. T. (AIP Publishing, 1975-02-15)
      The recent observations by Loy of amplitude modulation and compression of infrared laser pulses caused by passage through the dispersive modulator (a cell containing dilute NH3 vapor with a Stark-modulated resonant frequency) ...
    • Biological properties of a canine distemper virus isolate associated with demyelinating encephalomyelitis 

      Confer, Anthony W.; Kahn, Donald Edward; Koestner, Adalbert; Krakowka, Steven (American Society for Microbiology, 1975-04)
      A canine distemper virus (CDV), designated R252, originally recovered from a dog with demyelinating encephalomyelitis was shown to reproduce this disease in gnotobiotic dogs with a high incidence as compared to other CDV ...
    • Self-induced adiabatic rapid passage 

      Grischkowsky, Daniel R.; Loy, M. M. T. (American Physical Society, 1975-09)
      We show that, by virtue of the linewidth reduction provided by counter-propagating beams, it is possible to use the optical Stark shift to sweep a two-photon resonance through the sum frequency of the applied light while ...
    • Triethyl-n-hexylammonium triethyl-n-hexylboride: a new antimicrobial showing activity against Candida albicans and gram-positive bacteria 

      Rosenthal, K. S.; Storm, D. R.; Ford, Warren T.; Ford, Warren T. (Antimicrobial Agents and Chemotherapy, 1975-10)
      The organic salt triethyl-n-hexylammonium triethyl-n-hexylboride (N2226 B2226) has biostatic effects against two gram-positive bacteria, Bacillus subtilis and Micrococcus luteus, and the yeast Candida albicans. Escherichia ...
    • Adiabatic following model for two-photon transitions: Nonlinear mixing and pulse propagation 

      Grischkowsky, Daniel R.; Loy, M. M. T.; Liao, P. F. (American Physical Society, 1975-12)
      Two-photon resonantly enhanced parametric generation processes have generally been described using time-dependent perturbation theory. In this paper we show that a theory of two-photon coherent effects can be used to derive ...
    • Purification and properties of two deoxyribonucleases of Pseudomonas aeruginosa 

      Miller, Robert V.; Clark, A. J.; Miller, Robert V. (Journal of Bacteriology, 1976-08)
      A survey of the major deoxyribonucleases in Pseudomonas aeruginosa strain PAO was undertaken. Two activities predominated in Brij-58 lysates of this organism. These have been purified from contaminating nuclease activities, ...
    • Coherent excitation, incoherent excitation, and adiabatic states 

      Grischkowsky, Daniel R. (American Physical Society, 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 ...
    • Generation of time-reversed wave fronts by nonlinear refraction 

      Hellwarth, R. W.; Hellwarth, R. W. (Applied Physics Letters, 1977-01)
      We describe a nonlinear method for generating, nearly instantaneously, a time-reversed replica of any monochromatic-beam wave pattern. The method employs the interaction of the incident beam, of arbitrary wave front, with ...
    • Comment on the relationship between an exact two-photon solution and a two-photon vector model 

      Grischkowsky, Daniel R.; Brewer, R. G. (American Physical Society, 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 ...
    • Prophage F116: evidence for extrachromosomal location in Pseudomonas aeruginosa strain PAO 

      Miller, Robert V.; Pemberton, J. M.; Clark, A. J.; Miller, Robert V. (Journal of Virology, 1977-06)
      F116 is a temperate-generalized transducing phage of Pseudomonas aeruginosa. Genetic evidence leads to the conclusion that F116 prophage DNA is maintained extrachromosomally as a plasmid. Preliminary physical evidence is ...
    • Light-controlled light modulator 

      Grischkowsky, Daniel R. (AIP Publishing, 1977-10-01)
      A fast resonantly enhanced light-controlled light modulator is demonstrated. Optical switching action is obtained with driving laser pulses with intensities as low as 2 kW/cm^2. The switching mechanism is the optical ...
    • Characterization of Pseudomonas aeruginosa mutants deficient in the establishment of lysogeny 

      Miller, Robert V.; Ku, C. C.; Miller, Robert V. (Journal of Bacteriology, 1978-06)
      Mutants of Pseudomonas aeruginosa with impaired ability to establish a lysogenic relationship with temperate bacteriophage (Les-) have been isolated. These les mutations map to two areas of the P. aeruginosa chromosomal ...
    • Frequency of F116-mediated transduction of Pseudomonas aeruginosa in a freshwater environment 

      Morrison, W. D.; Miller, Robert V.; Sayler, G. S.; Miller, Robert V. (Applied and Environmental Microbiology, 1978-11)
      Transduction of Pseudomonas aeruginosa streptomycin resistance by a generalized transducing phage, F116, was shown to occur during a 10-day incubation in a flow-through environmental test chamber suspended in a freshwater ...