scholarly journals Optical properties of ion-implanted GaAs: The observation of finite-size effects in GaAs microcrystals

1989 ◽  
Vol 40 (2) ◽  
pp. 1064-1073 ◽  
Author(s):  
G. F. Feng ◽  
R. Zallen
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Finite Size ◽  
Finite Size Effects ◽  
Ion Implanted

Interband Optical Properties of the Microcrystalline Component within the Damage Layer of Be+ - Implanted GaAs

1988 ◽  
Vol 128 ◽  
Author(s):  
G. F. Feng ◽  
R. Zallen
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Finite Size ◽  
Bulk Crystal ◽  
Interband Absorption ◽  
Finite Size Effects ◽  
Damage Layer ◽  
Lorentz Oscillator ◽  
Fine Grain ◽  
Short Time

ABSTRACTThe damage layer in unannealed Be+-implanted GaAs samples (45-keV Be+ ions, 1013 to 5 × 1014 ions/cm2) consists of a fine-grain mixture of amorphous GaAs and GaAs microcrystals, with the characteristic microcrystal size L of the microcrystalline component decreasing with increasing fluence. We have carried out reflectivity measurements on these samples for photon energies from 2.0 to 5.6 eV, in the electronic interband regime. Using Lorentz oscillator analysis and the effective medium approximation, we have extracted the dielectric function of the microcrystalline component (μ-GaAs) within the damage layer. The optical properties of μ-GaAs deviate appreciably from those of the bulk crystal near the interband absorption peaks. The linevidths of these peaks are found to increase over the bulk-crystal value by an amount proportional to (l/L), the increase being about 0.2 eV when L =100 Å. These finite-size effects can be understood in terms of a lifetime reduction caused by the short time it takes for electrons to reach the microcrystal boundaries.

Finite Size Effects in Magnetic and Optical Properties of Antiferromagnetic NiO Nanoparticles

2014 ◽  
Vol 50 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Bhagaban Kisan ◽  
P. C. Shyni ◽  
Samar Layek ◽  
H. C. Verma ◽  
David Hesp ◽  
...  
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Finite Size ◽  
Nio Nanoparticles ◽  
Finite Size Effects

scholarly journals Finite Size Effects on Light Propagation throughout Random Media: Relation between Optical Properties and Scattering Event Statistics

2019 ◽  
Vol 8 (1) ◽  
pp. 1901196 ◽  
Author(s):  
José M. Miranda‐Muñoz ◽  
Victoria Esteso ◽  
Alberto Jiménez‐Solano ◽  
Gabriel Lozano ◽  
Hernán Míguez
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Random Media ◽  
Light Propagation ◽  
Finite Size ◽  
Finite Size Effects

Finite Size Effects on Electroluminescence of Nanoscale Semiconducting Polymer Heterojunctions

1997 ◽  
Vol 9 (2) ◽  
pp. 409-412 ◽  
Author(s):  
Samson A. Jenekhe ◽  
Xuejun Zhang ◽  
X. Linda Chen ◽  
Vi-En Choong ◽  
Yongli Gao ◽  
...  
Keyword(s):  
Size Effects ◽  
Finite Size ◽  
Finite Size Effects ◽  
Semiconducting Polymer

scholarly journals Entanglement, combinatorics and finite-size effects in spin chains

2009 ◽  
Vol 2009 (02) ◽  
pp. P02063 ◽  
Author(s):  
Bernard Nienhuis ◽  
Massimo Campostrini ◽  
Pasquale Calabrese
Keyword(s):  
Size Effects ◽  
Finite Size ◽  
Spin Chains ◽  
Finite Size Effects
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