scholarly journals Extremely confined quantum-well states for (2×2)-K and (3×3)-K on graphite: First-principles calculations

2011 ◽  
Vol 84 (16) ◽  
Author(s):  
V. Chis ◽  
L. Walldén
Keyword(s):  
Quantum Well ◽  
First Principles ◽  
First Principles Calculations ◽  
Quantum Well States

Strain Effects on Optical Gain Properties of GaN/AlGaN Quantum Well Lasers

1996 ◽  
Vol 421 ◽  
Author(s):  
M. Suzuki ◽  
T. Uenoyama
Keyword(s):  
Quantum Well ◽  
First Principles ◽  
Carrier Density ◽  
Optical Gain ◽  
Uniaxial Strain ◽  
Quantum Well Lasers ◽  
Physical Parameters ◽  
First Principles Calculations ◽  
Strain Effects ◽  
Laser Performance

AbstractSubband structures and optical gains of the strained wurtzite GaN/AlGaN quantum well lasers are theoretically investigated on the basis of k.p theory. First-principles calculations are used for deriving the unknown physical parameters, such as deformation potentials. Neither compressive nor tensile biaxial strains are so effective on the reduction of the threshold carrier density. It is also found that the uniaxial strain in the c-plane is one of the preferable approaches for the efficient improvement of the laser performance.

scholarly journals Efficiency limits of Si/SiO2 quantum well solar cells from first-principles calculations

2009 ◽  
Vol 105 (10) ◽  
pp. 104511 ◽  
Author(s):  
Thomas Kirchartz ◽  
Kaori Seino ◽  
Jan-Martin Wagner ◽  
Uwe Rau ◽  
Friedhelm Bechstedt
Keyword(s):  
Solar Cells ◽  
Quantum Well ◽  
First Principles ◽  
First Principles Calculations
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