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  • 1
    Electronic Resource
    Electronic Resource
    Extended Mulliken electron population analysis (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 3319-3325 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Mulliken electron population analysis has been a standard feature of computer output from the quantum mechanical molecular calculation. An extension of the original analysis is proposed here. It produces a point-charge model of a molecule that retains the same electric dipole moment as calculated with the molecular wave function. The analysis offers visually more interesting information than the original Mulliken analysis. The extension can be made easily by extracting and printing out some additional numerical data usually once computed but discarded after being processed in molecular calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458812
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  • 2
    Electronic Resource
    Electronic Resource
    A microscanning electron microscope in ultrahigh vacuum for surface microanalysis (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2844-2848 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A microscanning electron microscope (SEM) column has been constructed as an attachment of an ultrahigh-vacuum chamber with a 70 mm diam flange to observe microstructures on a solid surface. The micro-SEM column is 26 mm diam and 140 mm long and operated in an energy range from 100 eV to 3 keV. It consists of a thermal-field-emission (TFE) gun and two magnetic lenses. The excitation of the objective lens for 3 kV electrons is 250 A T at a working distance of 10 mm. The saturated temperature of the objective lens at the excitation of 250 A T is approximately 50 °C and the vacuum of the chamber is 2×10−10 Torr. The electron probe is adjustable against a specimen position from the outside of the vacuum by movement of the SEM column with screws. The spot size of the electron probe is 100 A(ring) at 3 kV and 3000 A(ring) at 300 eV in conditions of a working distance of 10 mm and a probe current of 3×10−11 A.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144625
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  • 3
    Electronic Resource
    Electronic Resource
    Stable cw operation at room temperature of a 1.5-μm wavelength multiple quantum well laser on a Si substrate (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 472-473 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Room-temperature cw operation of an InGaAs/InGaAsP multiple quantum well (MQW) laser diode on a Si substrate is reported. The MQW laser emits at a 1.54 μm wavelength and exhibits no degradation after over 2000 h of operation. Employing a hybrid organometallic vapor phase epitaxy/vapor mixing epitaxy method and a layer structure for improving crystalline quality, high-quality MQW layers are obtained. A stable longitudinal mode spectrum demonstrates the effectiveness of the MQW active layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106638
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  • 4
    Electronic Resource
    Electronic Resource
    Development of high-strength, high-conductivity Cu–Ag alloys for high-field pulsed magnet use (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 2965-2967 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A wire-conductor fabrication method has been developed for Cu–Ag alloys containing 2–60 at. % Ag where high strength and high conductivity conductors are obtained by cold working combined with intermediate heat treatment. The intermediate heat treatment is repeated 3–4 times at 350–450 °C for 1–2 h at appropriate stages of reduction of area. The optimized Cu-16 at. % Ag alloy wire with 99% reduction of area showed a tensile strength of 1000 MPa and an electrical conductivity of 80% IACS at room temperature. This suggests that the wires fabricated may be very promising for high-field pulsed magnet use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105813
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  • 5
    Electronic Resource
    Electronic Resource
    Sub-100 femtosecond pulses from an external-cavity surface-emitting InGaAs/InP multiple quantum well laser with soliton-effect compression (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 2076-2078 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have compressed strongly chirped optical pulses from a synchronously pumped In0.53Ga0.47As/InP multiple quantum well surface-emitting laser operating with an external cavity. The pulses, initially exhibiting a strong up-chirp with a time-bandwidth product of more than 100 times the Fourier transform limit, were compressed to 77 fs using dispersion and soliton compression in a negative group-velocity-dispersion fiber. Chirp compensation using a diffraction grating pair followed by soliton compression in a fiber gave pulses as short as 21 fs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106135
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