Photoelectrochemical fabrication of spectroscopic diffraction gratings
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Photoelectrochemical fabrication of spectroscopic diffraction gratings final report. by

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Published by EIC Laboratories, Inc. in Norwood, Mass .
Written in English

Subjects:

  • Diffraction gratings.,
  • Spectroscope.

Book details:

Edition Notes

SeriesNASA-CR -- 180786., NASA contractor report -- NASA CR-180786.
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL15284065M

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  This program was directed toward the production of Echelle diffraction gratings by a light-driven, electrochemical etching technique (photoelectrochemical etching). Etching is carried out in single crystal materials, and the differential rate of etching of the different crystallographic planes used to define the groove profiles. Etching of V-groove profiles was first discovered by us during Author: R. David Rauh, Michael M. Carrabba, Jianguo Li, Robert F. Cartland, John P. Hachey, Sam Mathew. Get this from a library! Photoelectrochemical fabrication of spectroscopic diffraction gratings--phase II. [R D Rauh; EIC Laboratories, Inc.; Goddard Space Flight Center.]. Get this from a library! Photoelectrochemical fabrication of spectroscopic diffraction gratings: final report.. [United States. National Aeronautics and Space Administration.;]. Photoelectrochemical fabrication of spectroscopic diffraction gratings, phase 2 By Sam Mathew, Robert F. Cartland, Michael M. Carrabba, R. David Rauh, Jianguo Li and John P. Hachey Abstract.

Photoelectrochemical fabrication of spectroscopic diffraction gratings. By Michael M. Carrabba, it was determined that diffraction gratings could be produced in gallium arsenide crystals by this method, using either a scanned focused laser beam or by uniform illumination of a ruling mask defined in metal or photoresist on the crystal. Fabrication and characterization of diffraction gratings in ophthalmic polymers by using UV direct laser interference patterning Compositional and structural modifications on the materials were studied by means of micro-Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). Diffraction.   Fabrication and Photoelectrochemical Behavior of Ordered CIGS Nanowire Arrays for Application in Solar Cells. X-ray diffraction analysis showed that nanowires, whose chemical composition was determined by energy-dispersive spectroscopy analysis, were amorphous. A composition of, very close to the stoichiometric value, was obtained. These. Title: Slide 1 Author: sasha Created Date: 4/23/ PM.

Diffraction gratings and optical spectroscopy. A grating disperses light of different wavelengths to give, for any wavelength, a narrow fringe. This allows precise spectroscopy. Absorption and emission spectra. Gas and incandescent lamps. Physics with animations and video film clips. Light. Physclips provides multimedia education in introductory physics (mechanics) at different levels. Direct photoelectrochemical (PEC) etching of diffraction gratings on n‐InP and n‐GaInAsP in a 2‐M HF/‐M KOH solution has been demonstrated using laser interference holography. Development of a maskless technique for producing gratings has potential application in the fabrication of distributed feedback lasers which are currently made by a multistep photoresist process.   Scalar diffraction formulation Software for Designing Diffractive Optics Concluding Remarks References. 2 Design of Diffractive Optical Elements Design of Simple Diffractive Optical Elements Design and analysis of 1D gratings Design of 1D gratings with MATLAB ® Design of 2D gratings Binary circular. First-order diffraction gratings for ?m DFB/DBR lasers have been fabricated by photoelectrochemical laser interference etching directly on n-InP substrates () with high uniformity and reproducibility. A profile depth of 75 nm was obtained for symmetrical triangular profiles in the () plane. In the () plane the profiles became asymmetrically U-shaped with a depth of 80 nm.