摘要:

We have fabricated two‐dimensional periodic arrays of circular openings with submicrometer diameter and spacing in thin photoresist films coated on top of glass substrates using a laser beam interferometric technique coupled with the simultaneous exposure and development (SED) method. The two‐dimensional grating masks generated in this way are comparable in quality to those generated by computer‐controlled scanning electron beam (CCSEB). Important advantages of the method described are that it is simple in both skill and instrumentation involved and that it is economic, fast, free of electron scattering and electrical charging problems, flexible, and able to generate large areas of uniform arrays. However, with this technique only periodic lattice structures can be generated. Possible new applications utilizing these structures are discussed.

ISSN:0003-6951    

DOI:10.1063/1.88360

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Rapid modulation of infrared radiation in the 10‐&mgr; wavelength region has been achieved by operating a thin‐film Pb1−xSnxTe optical shutter. The switching mechanism considered here takes advantage of the rapid absorption edge shift induced by an intense incident optical pump. Experimental evidence suggests the possibility of producing picosecond infrared transients.

ISSN:0003-6951    

DOI:10.1063/1.88361

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

The orientational relaxation times andS1singlet lifetimes for Rhodamine 6G molecules in various alcohols have been measured using mode‐locked laser pulses in a transient induced grating technique. The transient grating technique can be applied to measure a variety of atomic and molecular excited state phenomena on subnanosecond to picosecond time scales.

ISSN:0003-6951    

DOI:10.1063/1.88362

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

An increase in the ratio of S34/S32of 3300% over its natural ratio has been obtained by irradiating SF6in the presence of H2with an intensely focused CO2laser. The quantities of material separated are on the order of 100 &mgr;g.

ISSN:0003-6951    

DOI:10.1063/1.88371

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

We report the preparation of a CuInSe2/CdS heterojunction solar cell having a solar power conversion efficiency of 12% measured on a clear day in New Jersey (∼92‐mW/cm2solar intensity).

ISSN:0003-6951    

DOI:10.1063/1.88372

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

A novel low‐dark‐current high‐sensitivity vidicon target has been made using a semiconductor ‘n‐type CdSe’ coated with a granular metal ‘Au‐SiO2’ film. The granular metal‐semiconductor interface forms a Schottky barrier which blocks effectively the beam electrons. The high lateral resistance of the granular metal film precludes the need of an array structure to achieve good resolution.

ISSN:0003-6951    

DOI:10.1063/1.88373

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Tunable spin‐flip Raman and recombination laser emission from [Hg,Cd]Te have been observed using a chopped‐cw CO2laser as the pump. Peak powers of over 1 mW and average powers of over 100 &mgr;W have been obtained for both the spin‐flip Raman and recombination emissions with conversion efficiencies of over 0.3%. A zero‐fieldgfactor of ‖82‖±3 has been measured, corresponding to a conduction band‐edge effective‐mass ratio of 0.0098±0.0004.

ISSN:0003-6951    

DOI:10.1063/1.88374

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

A new effect is being developed which significantly improves the conversion efficiency of antireflection‐coated metal‐oxide‐semiconductor ‘AMOS’ solar cells. The effect, a marked increase in the open‐circuit voltage, is produced by the addition of an oxide layer to the semiconductor. Cells using gold onn‐type gallium arsenide have been made with efficiencies up to 15% in terrestrial sunlight. All processing steps are amenable to the use of low‐cost polycrystalline films of GaAs in place of the single crystals now used.

ISSN:0003-6951    

DOI:10.1063/1.88375

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

The instability of unprotected HgI2x‐ray detectors in vacuum, contrasted with their apparent stability in air is examined. The degradation is treated as a result of noncongruent sublimation of Hg and I2from the detector surface, resulting in a buildup of free Hg atoms. The calculations indicate that the observed degradation of these devices in vacuum is to be expected, and that similar degradation in air will occur at rates 103–104times more slowly.

ISSN:0003-6951    

DOI:10.1063/1.88376

出版商:AIP    

年代:1975

数据来源: AIP