摘要:

Films of halide complexes of silver can be electrodeposited onto, or removed from, transparent indium tin oxide contacts in less than 10 msec using a clear liquid mixture of dimethyl sulfoxide (DMSO), silver halide, alkali metal halide, and bromine or iodine. The solutions do not attack the contacts, even at high voltages, as long as adequate silver remains in solution. Variations include a mulled mixture of an opacifier and superionic conductor particles in a variety of organic solvents. The electro‐optic properties of experimental display structures are discussed.

ISSN:0003-6951    

DOI:10.1063/1.90549

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Intense electron‐beam pinches are formed and propagated at relatively high impedance (5–25 &OHgr;) using rod pinch diodes. Pinch propagation of up to 20 cm with 45% efficiency and ion‐generation efficiency ≳15% has been observed.

ISSN:0003-6951    

DOI:10.1063/1.90550

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

When two elastic solids of known interfacial and surface energies are placed in contact, various types of force are involved. It is shown that both the adhesive force and the peripheral attractive force are equal to one‐half the difference between the apparent Hertz load and the applied load. A simple formula enables values of these forces to be derived.

ISSN:0003-6951    

DOI:10.1063/1.90551

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Energetic 8‐nsec laser pulses were focused on Al, Au, and Cu foils ranging in thickness from 0.1 to 9 &mgr;m. The transmitted laser light was recorded and the plasma expansion from the front and back surfaces of these foils was measured using Thomson parabola and Faraday cup diagnostics. Comparison of the front‐ and back‐surface Thomson parabola traces clearly shows the change from ablatively driven behavior to nearly symmetric exploding‐pusher behavior for all of the materials.

ISSN:0003-6951    

DOI:10.1063/1.90552

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

A laser dye which is insoluble in water has been dissolved in hexane and emulsified in a water matrix. When pumped with a nitrogen laser, this mixture was observed to lase. The emulsion is superior to a simple hexane solution because the excellent thermo‐optical properties of the water matrix help prevent refractive‐index gradients from degrading laser performance. This is a useful characteristic for flash‐pumped dye lasers, laser‐pumped dye lasers, and liquid filters. Another type of solvent system, a critical solution, is also discussed. For certain dyes, a critical solution has even better thermo‐optical properties because of its ability to absorb heat as it undergoes a liquid‐liquid phase transition.

ISSN:0003-6951    

DOI:10.1063/1.90553

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Time‐reversed optical wave fronts were generated by degenerate four‐wave mixing in rubidium vapor. An extremely large and resonantly enhanced electronic nonlinearity, described by the adiabatic following (AF) model, was responsible for the mixing. The intensity dependence of the AF nonlinear susceptibility was shown to explain the observed reduction in conversion efficiency at high pumping intensities.

ISSN:0003-6951    

DOI:10.1063/1.90554

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

We observed the stratospheric ozone layer by a newly designed powerful laser radar using a differential‐absorption technique. A discharge‐pumped XeCl excimer laser with a 308‐nm wavelength was used as an emitter in this system. The observed ozone concentrations in an altitude range 16–25 km are in good agreement with those measured by radiosonde. The present system is promising for the continuous monitoring of the stratospheric ozone concentration because of the simplicity of the construction.

ISSN:0003-6951    

DOI:10.1063/1.90535

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Photoacoustic (i.e., photocalorimetric) measurements on photovoltaic devices can directly yield their energy conversion efficiency. This is illustrated for a Si solar cell, for which case excellent agreement is found with normal electrical measurements. In addition, the photoacoustic spectra under load and at open‐circuit conditions are reported and compared with the cell’s spectral response. Together, such measurements can provide information on the wavelength dependence of the cell performance as well.

ISSN:0003-6951    

DOI:10.1063/1.90536

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

We report the first solar cell whose junction is formed by a polymer‐semiconductor interface. Open‐circuit voltages,Voc≳0.7 V, have been observed on cells consisting of a thin film of polymeric sulfur‐nitride, (SN)x, deposited on GaAs. This is an enhancement of more than 40% over theVoccommonly measured with metal‐GaAs solar cells. Initial efforts have resulted in efficiencies ≳6% without antireflection coatings.

ISSN:0003-6951    

DOI:10.1063/1.90537

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

A simple method is described for fabricating fibers with large strain birefringence starting with standard MCVD preforms. The method is illustrated using borosilicate fibers. The birefringence and polarization properties are measured in a long fiber and the birefringence is also measured using a fiber slice and polarizing microscope.

ISSN:0003-6951    

DOI:10.1063/1.90538

出版商:AIP    

年代:1978

数据来源: AIP