creating knowledge for future



High Quality


Scholarly Publishing
                CAREER NETWORK  
         
World's one of the largest Research
Career Network
Benefits
  •     Academic & Industry jobs
  •     Project funding
  •     Visiting faculty positions
  •     Visiting scientist positions
  •     Invited talks
  •     and more...  
   
Register FREE  
 
 
 
 
 
  Physics Express 2014, 4: 11
  Research Article
 
Angular phonon dispersion in lateral superlattices
  V. A. Volodina,b, V. A. Sachkovc, I. S. Golovinc  
     
a A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrent’eva ave., 13, 630090, Novosibirsk, Russia
b Novosibirsk State University, Pirogova street, 2, 630090, Novosibirsk, Russia
c Omsk Scientific Center of Siberian Branch Russian Academy of Sciences, Neftezavodskaya Street, 54, Omsk, 644040 Russia

   
  Abstract  
  Phonon dispersion in GaAs/AlAs lateral superlattices on nanofaceted (311)A surface was calculated using enhanced Born approach. The angle phonon dispersions were obtained both for folded acoustic modes and for optic modes. The attempt to study this effect experimentally was carried out for (311)A GaAs6/AlAs8 lateral superlattice with the use of Raman scattering spectroscopy with micro-Raman setup. The spectra of backscattered light in the direction perpendicular to the nanofacets exhibit peaks corresponding to folded acoustic phonons and confined optical phonons. Some differences between calculated phonon frequencies and experimental ones may be due to not-ideal lateral periodicity in lateral superlattices.
     
  Keywords  
  Phonons; Lateral superlattices; Folding; Confinement; Raman scattering  
     
   
   
   
   
     

  © 2016 Cognizure