Full-band-structure calculation of second-harmonic generation in odd-period strained (Si)n/(Ge)nsuperlattices

1991 ◽  
Vol 43 (11) ◽  
pp. 8990-9002 ◽  
Author(s):  
Ed Ghahramani ◽  
D. J. Moss ◽  
J. E. Sipe
Keyword(s):  
Band Structure ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Structure Calculation ◽  
Band Structure Calculation ◽  
Strained Si ◽  
Full Band ◽  
Full Band Structure

AB-Initio Calculations Of Second Order Optical Response Functions In Wurtzite GAN and ALN, And Their Short Period Superlattices

1997 ◽  
Vol 482 ◽  
Author(s):  
Sergey N. Rashkeev ◽  
Walter R. L. Lambrecht ◽  
B. Segall
Keyword(s):  
Band Structure ◽  
Second Harmonic Generation ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
Harmonic Generation ◽  
First Principles ◽  
Second Harmonic ◽  
Response Functions ◽  
Short Period ◽  
Short Period Superlattices

AbstractSecond harmonic generation coefficients were calculated from first-principles for wurtzite GaN, AlN and the (0001) superlattices (SL) (GaN)n,(AlN)n for n = 2, 4. The effects of the LDA gap underestimate are discussed. The SLs are found to have a strongly reduced static SHG response. The frequency dependent SHG coefficients are found to be sensitive to the SL band structure and to differ significantly form a superposition of the bulk components, indicating a strong intermixing of the bands.

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