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Showing 1 to 20 of 60 for “"Optical studies"”.
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Optical studies of the mesospheric region
… Adelaide's Buckland Park field site to collect optical observations of the 557.7nm OI and 730nm OH airglow emissions. Data have been collected on an almost continuous basis since May 1995 through to May 2000, with observations made whenever the moon was not up. Techniques and analysis procedures …
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Optical studies of highly-doped GaAs:C
… γ<sub>p</sub> is large and corresponds to an optical hole mobility that is about half the Hall mobility at that p. Secondary-ion mass spectroscopy and localized-vibrational-mode measurements indicate that the Hall-effect-derived hole concentration is close to the carbon concentration and that …
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Synthesis and Optical Studies of Organoboron Compounds
… borafluorenes which have improved optical stability.A family of four-coordinate borafluorenes was synthesized, each containing a dative B-O bondand two tert-butyl moieties on the aryl ring. Transient absorption spectroscopy (TAS) of the newborafluorenes showed existence of a single …
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Optical studies of DNA-wrapped carbon nanotubes
This thesis presents a series of detailed optical studies of phonon-assisted relaxation processes in DNA-wrapped single walled carbon nanotubes. Using resonance Raman spectroscopy (RRS) and photoluminescence spectroscopy (PL), a careful characterization has been carried out on different DNA-wrapped …
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Optical studies of ion-bombarded gallium arsenide
The present work studies the disorder in ion-implanted and ion-etched GaAs semiconductors. The primary targets in this study consist of two types of systems:45-keV Be⁺-implanted GaAs and low-energy Ar⁺-etched GaAs. Electronic and lattice structural disorder in these systems are investigated by …
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Optical studies of chiral 1-substituted-2-phenylcyclohexanes
… were prepared in racemic and optically-active forms: trans-2-phenylcyclohexanol (I), cis-2-phenylcyclohexanol (II), trans-2-phenylcyclohexylamine (III), cis-2-phenylcyclohexylamine (IV), trans-2-phenylcyclohexanecarboxylic acid (V), trans-2-phenylcyclohexanecarbonyl chloride …
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Magneto - optical studies of quantum wells and superlattices
Contains fulltext : mmubn000001_028979664.pdf (Publisher’s version ) (Open Access)
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Gamma-Ray Optical Studies of ⁷³Ge and ⁵⁷Fe
… annealing for the nuclear Borrmann effect studies.</p> <p>The experimental setup and circuitry required for observation of the time-filtering effect were also developed and tested. The processing electronics used in the delayed coincidence circuit were optimized and the resulting …
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Magneto-optical studies of RirA and cytochrome cd1
Rhizobia are members of the Gram-negative α-proteobacteria. Rhizobium leguminosarum controls genes involved in iron uptake through repression under conditions of iron sufficiency. This part of iron regulation is co-ordinated by the dimeric rhizobial iron regulator, RirA. The sequence of RirA …
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Electrical and optical studies on carbon nanotube arrays
Single-walled carbon nanotubes (SWNTs) have been studied as a prominent class of high performance electronic materials for next generation electronics. Their geometry dependent electronic structure, ballistic transport and low power dissipation due to quasi one dimensional transport, and their …
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Transient transport and optical studies of chalcogenide glasses
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1985.
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Optical studies of the nature of metallic surfaces
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1936
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Optical studies of super-collimation in photonic crystals
… the fabrication of photonic crystals for optical wavelengths. These periodic structures of alternating high-to-low index of refraction materials allow the observation of peculiar effects, in particular, the propagation of optical beams without spatial spreading. This effect, called …
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Nonlinear and linear optical studies of Si-SiO2 interfaces
Contains fulltext : mmubn000001_254659667.pdf (Publisher’s version ) (Open Access)
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Nano-optical studies of superconducting nanowire single-photon detectors
… of device uniformity and achieving efficient optical coupling. Nano-optical techniques such as confocal microscopy can be used to image localised areas of SNSPDs providing a direct measurement of the device uniformity. The work in this thesis describes both initial nano-optical testing at …
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Optical Studies of Rare Gas Impurities in Alkali Metals
Made available in DSpace on 2015-05-12T22:39:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7511802.PDF: 4165954 bytes, checksum: 0de9c0bb1c1b04d3b220214fa8dc494b (MD5) Previous issue date: 1974
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Optical Studies of Rare Gas Impurities in Alkali Metals
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-09T21:42:07Z No. of bitstreams: 1 1974_tilton.pdf: 4324042 bytes, checksum: 231302e618becf1a28c904a0d79f7881 (MD5)
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Nonlinear optical studies of dye-doped nematic liquid crystals
Nematic liquid crystals possess large optical nonlinearities owing to their large refractive index anisotropy coupled with the collective molecular reorientation. Doping absorbing dyes into liquid crystals increases their optical responses significantly due to increased absorption in the visible …
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Interband and intraband optical studies of CdSe colloidal nanocrystal films
We present results for optical measurements on charged CdSe nanocrystals. The injection of electrons into quantum confined states is confirmed by monitoring changes in the visible and infrared absorption spectra. Interestingly, the response is observed only in the nanocrystals that have been …
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