OPTICAL ABSORPTION OF CONFINED EXCITONS IN Tl HALIDE THIN FILMS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3769-3772
Author(s):  
A. FUJII ◽  
T. ONO ◽  
W. YU ◽  
R. MAKI
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Size Effect ◽  
Exchange Interaction ◽  
Absorption Spectra ◽  
Crystal Size ◽  
Experimental Results ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Quantum Size

Optical absorption spectra of the direct exciton of TlCl and TlBr micro-crystals are measured in evaporated thin films at 5.0K. The energy of the direct exciton bands shift to higher energy with decreasign micro-crystal size. The lower component of the doublet of the exciton in TlCl decreases its intensity with decreasing micro-crystal size. The experimental results are discussed with the quantum-size effect on the exciton states and on the electron-hole exchange interaction in an exciton.

Optical-absorption spectra of ferromagnetic semiconducting HgCr2Se4 thin films

1983 ◽  
Vol 2 (6) ◽  
pp. 1944-1949 ◽  
Author(s):  
N. Koguchi ◽  
K. Masumoto ◽  
S. Takahashi
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectra

QUANTUM CONFINEMENT AND COULOMB EFFECTS IN SEMICONDUCTOR QUANTUM DOTS

1990 ◽  
Vol 04 (16) ◽  
pp. 1009-1016 ◽  
Author(s):  
Y.Z. HU ◽  
S.W. KOCH ◽  
D.B. TRAN THOAI
Keyword(s):  
Quantum Dots ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Quantum Confinement ◽  
Semiconductor Quantum Dots ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Quantum Confinement Effects ◽  
Electron Hole Pair ◽  
Coulomb Effects

Coulomb and quantum confinement effects in small semiconductor microcrystallites are analyzed. Energies and wavefunctions for one- and two-electron-hole-pair states are computed and optical absorption spectra are evaluated.

Effect of Stacking and Redox State on Optical Absorption Spectra of Melanins−Comparison of Theoretical and Experimental Results

2005 ◽  
Vol 109 (5) ◽  
pp. 1970-1977 ◽  
Author(s):  
Klaus B. Stark ◽  
James M. Gallas ◽  
Gerry W. Zajac ◽  
Joseph T. Golab ◽  
Shirley Gidanian ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Redox State ◽  
Experimental Results ◽  
Optical Absorption Spectra

Plausible interpretation of optical absorption spectra of a-SiC:H thin films

2001 ◽  
Vol 184 (1-4) ◽  
pp. 214-220 ◽  
Author(s):  
V.I. Ivashchenko ◽  
G.V. Rusakov ◽  
V.I. Shevchenko ◽  
A.S. Klymenko ◽  
L.A. Ivashchenko ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectra

Formation of Single-phase CuO Quantum Particles

2002 ◽  
Vol 17 (5) ◽  
pp. 1220-1223 ◽  
Author(s):  
Kavita Borgohain ◽  
Shailaja Mahamuni
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Size Effects ◽  
Single Phase ◽  
Absorption Feature ◽  
Quantum Size Effects ◽  
Optical Absorption Spectra ◽  
Quantum Size ◽  
Quantum Particles ◽  
Cuo Nanocrystals

CuO nanocrystals of three different sizes 3.5, 6.5, and 10.0 nm were synthesized by a novel electrochemical route. Quantum size effects in these nanocrystals are evident from the optical absorption spectra. The optical absorption feature is observed to be blue shifted by about 1 eV with size reduction. The CuO q-particles were found to be single-phased and very stable as far as the size and phase is concerned.

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