APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

1 Oct 1974

Volume 25, Issue 7, pp. 363-428

Page 1 of 2 Pages Next Page | Jump to Page

A surface acoustic wave planar resonator employing an interdigital electrode transducer

K. M. Lakin, T. Joseph, and D. Penunuri

Appl. Phys. Lett. 25, 363 (1974); http://dx.doi.org/10.1063/1.1655509 (3 pages) | Cited 2 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF


See Also: Erratum

Show Abstract
A surface acoustic wave planar resonator is described in theory and experiment. The resonance is due to energy storage within an interdigital transducer. Experimental results are reported for a one hundred finger pair double electrode transducer on YZ LiNbO3 which exhibited a resonance Q of 1900 at 34 MHz. The resonator is unique in that the resonant frequency is not determined by material dimensions and many such devices can be fabricated upon a common substrate.

Extended dislocations in GaAs0.7P0.3

S. Mader and A. E. Blakeslee

Appl. Phys. Lett. 25, 365 (1974); http://dx.doi.org/10.1063/1.1655510 (3 pages) | Cited 5 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Misfit dislocations in epitaxially grown layers of GaAs1−xPx with a lattice constant gradient were examined by weak beam TEM. They are dissociated into partial dislocations and in specimens with (113) growth planes they form networks of extended and contracted nodes on (111) planes. The dissociation corresponds to an intrinsic stacking fault energy of 43 erg∕cm2 for GaAs0.7P0.3.

Rayleigh wave guidance using anisotropic topographic structures

L. A. Coldren

Appl. Phys. Lett. 25, 367 (1974); http://dx.doi.org/10.1063/1.1655511 (4 pages) | Cited 6 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
A new type of topographic acoustic surface waveguide which uses substrate anisotropy is described. In this guide the velocity reduction at the center of a hump or depression on the substrate is primarily due to the change in crystal cut rather than a reduction in material constraint as in other topographic guides. Experimental results obtained on the (001) apex of a 110 axis Bi12GeO20 rod are in good agreement with the predictions of a ``lenslike media'' theory based on parabolically approximated wave surfaces.

Noncollinear acousto‐optic filter with large angular aperture

I. C. Chang

Appl. Phys. Lett. 25, 370 (1974); http://dx.doi.org/10.1063/1.1655512 (3 pages) | Cited 49 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF


See Also: Erratum

Show Abstract
A new type of noncollinear acousto‐optic filter with large angular aperture is described. By an appropriate choice of acoustic wave propagation direction, the momentum mismatch caused by the angular deviation of the incident light from the matching condition in a noncollinear interaction can be compensated by the angular change of optical birefringence. A TeO2 noncollinear acousto‐optic filter was constructed that had a half‐power bandwidth of 40 Å at an f∕4 (±7°) aperture. Tuning from 700 to 450 nm is obtained by changing the acoustic frequency from about 100 to 180 MHz. About 95% maximum transmission is obtained with an electrical power density of 1 W∕cm2 applied to the transducer.

Stabilizing effect produced by acoustic surface waves on collinearly propagating light beams

A. Alippi

Appl. Phys. Lett. 25, 372 (1974); http://dx.doi.org/10.1063/1.1655513 (3 pages)

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The interaction of light with the field of the alternating strains produced by inhomogeneous acoustic surface waves may enable one to guide light beams underneath the surface of solid media. The evaluation is made of the convergence which may be attained for light beams which collinearly propagate with the acoustic waves. Maximum spreading angles are obtained which are equal to a fractional variation of the refractive index induced by the stress wave of the order of 0.1 Δn∕n.

Two‐photon resonantly enhanced self‐defocusing in Cs vapor at 1.06 μ

R. H. Lehmberg, J. Reintjes, and R. C. Eckardt

Appl. Phys. Lett. 25, 374 (1974); http://dx.doi.org/10.1063/1.1655514 (3 pages) | Cited 12 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The electronic nonlinear refractive index in Cs vapor at 1.06 μ is shown to be negative and to consist of two distinct contributions. One of these contributions arises from a two‐photon resonance in the susceptibility and can be made comparable in magnitude to the positive n2 in laser glass. The other term arises from population redistributions between the ground and first excited state. We present measurements of self‐defocusing of a single pulse from a Nd: YAG mode‐locked laser that are in agreement with the theoretical predictions.

Stimulated cyclotron resonance scattering and production of powerful submillimeter radiation

P. Sprangle and V. L. Granatstein

Appl. Phys. Lett. 25, 377 (1974); http://dx.doi.org/10.1063/1.1655515 (3 pages) | Cited 40 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Interaction of a high‐frequency electromagnetic pump wave with a magnetized plasma is analyzed. Enhanced growth rates for parametric instability are found near cyclotron resonance. The result implies that tunable high‐power submillimeter sources could be developed using intense relativistic electron beams.

Dependence of ion acceleration on limiting current in relativistic electron beams

David C. Straw and R. B. Miller

Appl. Phys. Lett. 25, 379 (1974); http://dx.doi.org/10.1063/1.1655516 (3 pages) | Cited 17 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
A 2‐MeV 15‐kA 45‐nsec electron beam was used to obtain high‐energy deuterons when injected into a chamber filled with neutral deuterium at low pressure. It was found that ion acceleration did not occur until the electron current exceeded the space‐charge limiting current, the threshold established by the acceleration model of Olson. The limiting current was varied through its dependence on the ratio of guide tube radius to injected electron beam radius. The maximum deuteron energy was measured to be 4.5 MeV for the largest guide tube to beam radius ratio. An increasing average ion energy with an increasing radius ratio was also observed.

Observation of subgrain boundaries and dislocations by neutron diffraction topography

M. Schlenker, J. Baruchel, J. F. Pétroff, and W. B. Yelon

Appl. Phys. Lett. 25, 382 (1974); http://dx.doi.org/10.1063/1.1655517 (3 pages) | Cited 12 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
We have improved the resolution of neutron diffraction topography by working with a low‐divergence primary beam from a neutron guide tube and using an almost perfect monochromator. As a result, we have obtained neutron topographs revealing, although with a resolution still very inferior to that of x‐ray topography, subgrain boundaries and inclusions in a Fe‐2.5 wt% Si single crystal, as well as some individual dislocations in a germanium single crystal. Their contrast is compared with that of x‐ray topographs of the same specimens and discussed.

Phase‐matched guided optical second harmonic wave generation in oriented ZnS polycrystalline thin‐film waveguides

Hiromasa Ito, Naoshi Uesugi, and Humio Inaba

Appl. Phys. Lett. 25, 385 (1974); http://dx.doi.org/10.1063/1.1655518 (3 pages) | Cited 7 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The first experimental verification of phase‐matched SHG was performed in the polycrystalline ZnS thin‐film waveguide deposited on a BK‐7 glass substrate. The complete phase‐matching between the TE1 mode at the fundamental frequency of 1.054 μm and the TM4 mode at its second harmonic wave was realized by using a tunable optical parametric oscillator. The interaction length estimated from the tuning curve for the phase matching was about 35 μm and the output harmonic power was of the order of milliwatts at 300‐W fundamental input under the phase‐matched condition.

Coherent anti‐Stokes Raman spectroscopy

R. F. Begley, A. B. Harvey, and R. L. Byer

Appl. Phys. Lett. 25, 387 (1974); http://dx.doi.org/10.1063/1.1655519 (4 pages) | Cited 92 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Coherent anti‐Stokes Raman spectroscopy offers significant advantages over standard incoherent Raman spectroscopy. The advantages include 105 improvement in conversion efficiency, spectral and spatial discrimination against fluorescence, low incident average power, and no requirement for a monochromator. The potential disadvantages of signal scaling as power cubed and requirement for a high peak power tunable laser source are largely overcome by presently available tunable laser sources. The method appears particularly useful for investigating biological compounds where background fluorescence is a problem for conventional spontaneous Raman studies. We show that for low concentrations, the density‐squared signal dependence becomes linear due to coherent mixing with an intense solvent Raman mode or the third‐order background signal.

Carrier mobility profiles for low‐dose boron‐implanted layers

M. Y. Darwish and H. W. Luginbühl

Appl. Phys. Lett. 25, 390 (1974); http://dx.doi.org/10.1063/1.1655520 (2 pages) | Cited 1 time

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Carrier concentration and mobility profiles of low‐dose boron‐implanted layers have been measured for several low‐temperature heat treatments. It is found that sufficient activation of impurities can be obtained, but that significantly lower mobilities have to be expected.

Low‐loss parallel‐plate waveguide at 10.6 μm

H. Nishihara, T. Inoue, and J. Koyama

Appl. Phys. Lett. 25, 391 (1974); http://dx.doi.org/10.1063/1.1655521 (3 pages) | Cited 16 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
A slightly curved parallel‐plate waveguide made of metal or dielectric material is proposed for a low‐loss and self‐focusing optical guide for CO2 laser beams. The minimum‐loss TE1 mode in a copper guide with a separation of 0.5 mm has a transmission loss as low as 0.02 dB∕m, and the loss is 6 times less than that of the TE01 mode in the hollow circular guide of diameter equal to the separation. Theoretical prediction of the low‐loss and self‐focusing characteristics of the waveguide has been experimentally confirmed.

Tunable far infrared methyl fluoride laser using transverse optical pumping

Fielding Brown, Steven Kronheim, and Eric Silver

Appl. Phys. Lett. 25, 394 (1974); http://dx.doi.org/10.1063/1.1655522 (3 pages) | Cited 7 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Some severe limitations of optically pumped superradiant FIR lasers (700‐MHz linewidth, ragged pulse shape) may be overcome by using transverse optical pumping (TOP). Strong (∼500 W) lines have been produced in CH3F with linewidth <30 MHz, and cavity tuning has been achieved over a range of 460 MHz at 496 μm. Prospects for extending the tuning range and increasing the power are considered.

Anomalies in the surface plasmon resonance excitation at both surfaces of evaporated metal films

Willes H. Weber and S. L. McCarthy

Appl. Phys. Lett. 25, 396 (1974); http://dx.doi.org/10.1063/1.1655523 (3 pages) | Cited 15 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Measurements of the resonant excitation of surface plasmons at both the air and substrate surfaces of evaporated Ag films indicate that the real part of ϵAg is a larger negative number at the substrate interface. This difference can be explained with a Maxwell‐Garnett type theory which assumes that the film density near the air surface is several percent below that near the substrate interface.

Semiconductor‐electrolyte interface devices for solar energy conversion

T. S. Jayadevaiah

Appl. Phys. Lett. 25, 399 (1974); http://dx.doi.org/10.1063/1.1655524 (2 pages) | Cited 16 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
A new application of the well known semiconductor‐electrolyte interface is reported in this letter. The space‐charge layer necessary for photovoltaic processes is simply created in the semiconductor‐electrolyte interface by the charge transfer process. Application of this interface for solar energy conversion is quite interesting. These cells avoid the costly and elaborate p‐n junction fabrication and allow the use of polycrystalline and amorphous semiconductors for photovoltaic conversion.

Oxidation studies of amorphous and crystalline germanium films by Auger spectroscopy

John C. C. Fan and Victor E. Henrich

Appl. Phys. Lett. 25, 401 (1974); http://dx.doi.org/10.1063/1.1655525 (3 pages) | Cited 6 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Using Auger spectroscopy and ion‐beam etching, we have studied the room‐temperature oxidation of sputtered and electron‐beam‐evaporated germanium films. Large differences are observed between the oxygen profiles of sputtered and e‐beam amorphous films. Sputtered amorphous films have only a very thin layer of oxide on the surface (4–5 Å), possibly because the presence of argon in the films inhibits further oxidation. In e‐beam amorphous films, the heavily oxidized layer is also thin (7–8 Å), but some oxygen is present as far as 200 Å into the samples.

Tunable dye laser pulse converter for production of picosecond pulses

C. K. Chan and S. O. Sari

Appl. Phys. Lett. 25, 403 (1974); http://dx.doi.org/10.1063/1.1655526 (4 pages) | Cited 40 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
An open flowing Rh6G dye laser, cavity length tuned to a mode‐locked Ar+ laser, has been used to generate continuous pulse trains tunable from 5600 to 6100 Å over the dye lasing bandwidth. Interferometric pulsewidth measurement using second harmonic generation yields a pulsewidth of 2.8 ps.

Nondestructive technique for the precise evaluation of optical waveguides

Daisuke Kato

Appl. Phys. Lett. 25, 406 (1974); http://dx.doi.org/10.1063/1.1655527 (3 pages) | Cited 2 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
In order to offer an effective method to measure a characteristic such as the light attenuation in an optical waveguide without breaking or contacting the sample, regular light scattering signals have been separated from the irregular ones by rejecting the Rayleigh component.

Streak camera investigation of the self‐focusing onset in glass

A. J. Campillo, Robert A. Fisher, R. C. Hyer, and S. L. Shapiro

Appl. Phys. Lett. 25, 408 (1974); http://dx.doi.org/10.1063/1.1655528 (4 pages) | Cited 2 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The onset of self‐focusing in a glass sample has been studied with a streak camera. After passing through the sample, the beam is no longer focused by a subsequent lens into a nearly diffraction‐limited spot, but rather into a time‐dependent ring. A simple model explains these results and indicates practical limitations for uniformly illuminating small targets with a Nd:glass laser chain.

``Photoinduced relaxation'' in amorphous As☒S films

A. Matsuda, H. Mizuno, T. Takayama, M. Saito, and M. Kikuchi

Appl. Phys. Lett. 25, 411 (1974); http://dx.doi.org/10.1063/1.1655529 (3 pages) | Cited 5 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The photoinduced motion of a As2S8 film‐mica substrate system has been observed during He☒Cd laser beam irradiation on the surface of the evaporated region. Experimental results using a prestressed mica substrate during the evaporation show that this phenomenon is a ``photoinduced relaxation'' effect.

Temperature dependence of the gold acceptor energy level in silicon

O. Engström and H. G. Grimmeiss

Appl. Phys. Lett. 25, 413 (1974); http://dx.doi.org/10.1063/1.1655530 (3 pages) | Cited 25 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Using the spectral distribution of the optical emission rates it is shown that the gold acceptor energy level in silicon is probably pinned to the conduction band in the temperature range between 90 and 242 K.

Grating masks suitable for ion‐beam machining and chemical etching

Won‐Tien Tsang and Shyh Wang

Appl. Phys. Lett. 25, 415 (1974); http://dx.doi.org/10.1063/1.1655531 (4 pages) | Cited 4 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
By using the simultaneous exposure and development technique, high‐resolution relief gratings with periods as small as 2400 Å have been produced which have grooves cleanly developed down to the substrate surface and exposing wide surface stripes with clearly defined, sharp and narrow photoresist ridges. Such gratings are suitable for use as masks in ion‐beam machining and chemical etching. Results of chemically etched gratings into glass substrates with a 5000‐Å period are presented and prospects of obtaining chemically etched gratings with shorter periods are discussed.

Transport and localized levels in amorphous binary chalcogenides

Richard H. Bube, John E. Mahan, Ralph T.‐S. Shiah, and Hubert A. Vander Plas

Appl. Phys. Lett. 25, 419 (1974); http://dx.doi.org/10.1063/1.1655532 (3 pages) | Cited 13 times

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
Measurements of photoconductivity versus intensity and temperature, photoconductivity decay, thermoelectric power versus temperature, and field effect have been extended to several binary amorphous semiconductors: Sb2Te3, As2Te3, As2Se3, and Ge2Te7, to be compared with earlier measurements on As2SeTe2 and Ge3Se2Te4 and more complex multicomponent chalcogenides. Analogous behavior is found in all these materials: about 1019 cm−3 eV−1 localized recombination levels within about 0.1 eV of the gap edges; about 1019 cm−3 eV−1 localized levels near the equilibrium Fermi level; thermally activated mobility with activation energy of the order of 0.1–0.2 eV. Crystallization produces an increase in photoconductivity at 100°K by over a factor of 106.

Quantum detection of microwave acoustic pulses

M. Martin and J. Y. Desmons

Appl. Phys. Lett. 25, 421 (1974); http://dx.doi.org/10.1063/1.1655533 (3 pages) | Cited 1 time

Online Publication Date: 9 October 2003

Full Text: | Download PDF

Show Abstract
The effect of longitudinal phonons on a very wide Dayem bridge involving amplitude voltage steps ΔV=hv∕2e of the detected echoes has been measured. The mechanism seems to be related to the motion of the vortices created by the dc bias current.
Page 1 of 2 Pages Next Page | Jump to Page
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close