Peculiarities of InSe absorption spectra in the domain of direct exciton transitions

2009 ◽  
Author(s):  
Natalya K. Kramar ◽  
Valeriy M. Kramar ◽  
Olena V. Pugantseva
Keyword(s):  
Absorption Spectra ◽  
Exciton Transitions

scholarly journals Permittivity spectra and structure of d-bands of germanium telluride, tin telluride and lead telluride

2020 ◽  
pp. 44-49
Author(s):  
D.A. Perevoshchikov ◽  
◽  
V.Val. Sobolev ◽  
A.I. Kalugin ◽  
E.A. Antonov ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Lead Telluride ◽  
Germanium Telluride ◽  
General Behavior ◽  
Electron Transitions ◽  
Tin Telluride ◽  
Experimental Absorption ◽  
Exciton Transitions

Based on the experimental absorption spectra, the permittivity spectra of GeTe, SnTe, and PbTe crystals were obtained in the region of electron transitions from core d -bands of cations. Their specific features and general behavior are revealed. The permittivity spectra of each crystal were decomposed into six elementary components and their main parameters were determined by using of combined Argand diagrams method. Based on the theory of interband and exciton transitions, the nature of the formation of these oscillators was proposed.

Free-exciton transitions in the optical absorption spectra ofGaAs1−xPx

1976 ◽  
Vol 13 (12) ◽  
pp. 5415-5419 ◽  
Author(s):  
R. J. Nelson ◽  
N. Holonyak ◽  
W. O. Groves
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Free Exciton ◽  
Optical Absorption Spectra ◽  
Exciton Transitions

scholarly journals Spectroscopy of PbS and PbSe quantum dots in fluorine phosphate glasses

2018 ◽  
Vol 52 (5) ◽  
pp. 497
Author(s):  
M.S. Kuznetsova ◽  
R.V. Cherbunin ◽  
V.M. Litvyak ◽  
E.V. Kolobkova
Keyword(s):  
Quantum Dots ◽  
Absorption Spectra ◽  
Phosphate Glass ◽  
Semiconductor Quantum Dots ◽  
Phosphate Glasses ◽  
Temperature Behavior ◽  
Narrow Bandgap ◽  
Different Temperatures ◽  
Quantum Confined ◽  
Exciton Transitions

AbstractTransmission spectra of the narrow-bandgap semiconductor quantum dots PbS and PbSe in the fluorine phosphate glass are experimentally studied at different temperatures. Energies of 1s exciton transitions observed in the absorption spectra are used to determine characteristic sizes of the quantum dots under study. A nontrivial temperature behavior of the ground and excited quantum confined states in the quantum dots of different sizes are observed.

Ultraviolet Absorption of Refractory Elements by a Dual Laser Plasma Method

1988 ◽  
Vol 102 ◽  
pp. 243-246
Author(s):  
J.T. Costello ◽  
W.G. Lynam ◽  
P.K. Carroll
Keyword(s):  
Absorption Spectra ◽  
Laser Plasma ◽  
Optical Pulse ◽  
Ionic Species ◽  
Neutral Species ◽  
Plasma Method ◽  
Plasma Technique ◽  
Refractory Elements ◽  
Delay Times ◽  
Dual Laser

AbstractThe dual laser-produced plasma technique for the study of ionic absorption spectra has been developed by the use of two Q-switched ruby lasers to enable independent generation of the absorbing and back-lighting plasmas. Optical pulse handling is used in the coupling cicuits to enable reproducible pulse delays from 250 nsec. to 10 msec, to be achieved. At delay times > 700 nsec. spectra of essentially pure neutral species are observed. The technique is valuable, not only for obtaining the neutral spectra of highly refractory and/or corrosive materials but also for studying behaviour of ionic species as a function of time. Typical spectra are shown in Fig. 1.

XUV Absorption Spectra of Carbon Ions

1988 ◽  
Vol 102 ◽  
pp. 71-73
Author(s):  
E. Jannitti ◽  
P. Nicolosi ◽  
G. Tondello
Keyword(s):  
Absorption Spectra ◽  
Cross Section ◽  
Theoretical Calculations ◽  
Photoionization Cross Section ◽  
Carbon Ions

AbstractThe photoabsorption spectra of the carbon ions have been obtained by using two laser-produced plasmas. The photoionization cross-section of the CV has been absolutely measured and the value at threshold, σ=(4.7±0.5) × 10−19cm2, as well as its behaviour at higher energies agrees quite well with the theoretical calculations.

Surface enhancement of Raman and absorption spectra from cyanine dye D266 adsorbed on ZnO colloids

1996 ◽  
Vol 88 (1) ◽  
pp. 281-290 ◽  
Author(s):  
HAO WEN ◽  
TIANJING HE ◽  
CUNYI XU ◽  
JIAN ZUO ◽  
FAN-CHEN LIU
Keyword(s):  
Absorption Spectra ◽  
Cyanine Dye ◽  
Surface Enhancement ◽  
Zno Colloids
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