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  • 1
    Electronic Resource
    Electronic Resource
    Study of higher excited Rydberg states in ethylene (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 4093-4094 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and photoionization spectra of ethylene have been shown to exhibit weak broad structures in the spectral region between the ionization threshold and 1060 A(ring). Some members of three Rydberg series that converge to the first excited electronic state A˜(2B3) of C2H+4 have been identified. They have been tentatively assigned as transitions from the ground state to the 4sσ-, 4pσ-, 3d-, and 4d-Rydberg states. The C2H4 molecule is suggested to be twisted in at least the 4sσ- and nd-Rydberg states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460639
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  • 2
    Electronic Resource
    Electronic Resource
    Limitations on ultrafast optical switching in a semiconductor laser amplifier operating at transparency current (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 4740-4747 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ultrafast optical switching in a semiconductor laser amplifier (SLA) at transparency current is studied under a strong pump condition. The switch configuration is a nonlinear optical loop mirror with a SLA as the nonlinear element. We demonstrate optical switching with 2 ps recovery time and 60% nonlinear transmission at switching energy of 9 pJ. We find that the transparency current is pump power dependent and that the transparency current is different for uniform 7-bit input control pulses at 100 Gb/s. We believe these two outcomes are due to significant carrier generation via two photon absorption (TPA) at high pump intensity. To verify our hypothesis, we modify coupled propagation equations by including the carrier generation due to the TPA and solve the equations numerically. Good agreement between the experimental and simulation results is obtained. We conclude that to achieve complete pattern-independent 100 Gb/s optical switching using a SLA at transparency current, we have to avoid TPA or use the SLA with a transit time shorter than the control pulse width. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371438
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  • 3
    Electronic Resource
    Electronic Resource
    Theory of Faraday rotation in granular magnetic materials (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 2736-2741 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a formalism to treat Faraday rotation (FR) in composite media. The method is not limited to low concentrations of magnetically active inhomogeneities and is thus useful for understanding the magneto-optical properties of such inhomogeneous media over the whole range of concentrations. It involves the calculation of an effective magnetic-field-dependent dielectric tensor @sεe using a tensor effective-medium approximation. To illustrate the technique, we present the results of several model calculations involving both paramagnetic and ferromagnetic metals. We find that such materials have strongly enhanced FR over a wide range of frequencies. The effects of particle shapes on FR are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345438
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