scholarly journals Resonant Light Absorption by Semiconductor Quantum Dots

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
I. G. Lang ◽  
S. T. Pavlov
Keyword(s):  
Quantum Dots ◽  
Magnetic Fields ◽  
Cross Section ◽  
Light Absorption ◽  
Semiconductor Quantum Dots ◽  
Electric And Magnetic Fields ◽  
The Cross

The cross-section of light absorption by size-quantized semiconductor quantum dots (QD) is calculated in the case of a resonance with an exciton in cubical crystals of class. The interference of stimulating and induced electric and magnetic fields is taken into account. The cross-section of light absorption is proportional to the exciton nonradiative damping .

EXCITON-MEDIATED RAMAN SCATTERING IN ONE-DIMENSIONAL QUANTUM DOTS

2011 ◽  
Vol 25 (32) ◽  
pp. 4387-4393 ◽  
Author(s):  
HAI-CHAO SUN ◽  
CUI-HONG LIU
Keyword(s):  
Quantum Dots ◽  
Differential Cross Section ◽  
Raman Scattering ◽  
Cross Section ◽  
Differential Cross ◽  
Semiconductor Quantum Dots ◽  
Scattering Process ◽  
One Dimensional ◽  
Intermediate States ◽  
Potential Frequency

The differential cross section (DCS) for exciton-mediated Raman scattering (EMRS) in one-dimensional semiconductor quantum dots is presented. The exciton states are considered as intermediate states in the Raman scattering process. The selection rules for the EMRS process are studied. The numerical results show that the contribution to DCS indicated by exciton is larger than that by electron. DCS of EMRS is larger when there is a bigger confinement potential frequency.

scholarly journals An attempt to detect some electro-optical effects

1909 ◽  
Vol 82 (553) ◽  
pp. 224-226
Keyword(s):  
Magnetic Fields ◽  
Cross Section ◽  
Simple Form ◽  
Silver Film ◽  
Short Account ◽  
Optical Part ◽  
Propagation Of Light ◽  
Optical Effects ◽  
Electric And Magnetic Fields ◽  
Velocity Of Propagation

The following paper contains a description of some experiments made with the object of detecting possible effects due to electric and magnetic fields and moving matter on the velocity of propagation of light in glass. The results obtained were negative, but it seems worth while to publish a short account of the experiments. The optical part of the apparatus is a simple form of interferometer which proved very easy and convenient to work with. It consists of a square glass frame made up of glass bars of square cross-section cemented together with canada balsam. Three of the corners are cut off at 45°, as shown in the figure, and the fourth corner contains a half silvered surface FF. Light entering in the direction of the arrow A is divided into two beams by the silver film, which pass round the frame in opposite directions, being totally reflected at the cut-off corners. Half of each beam emerges in the direction of the arrow B, and the two beams at B are in a condition to interfere with each other.

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