The acoustic phonons can have gain under application of a suitable drift field. The form of the attenuation constant suggests that the optical phonons can also have gain; however, our theory cannot apply due to the large drift field required....
We report the results of the investigation of the acoustic and optical phonons in quasi-two-dimensional antiferromagnetic semiconductors of the transition metal phosphorus trisulfide family with Mn, Fe, Co, Ni, and Cd as metal atoms. The Brillouin-Mandelstam and Raman light scattering spectroscopies ...
Optical Phonons in K Cl 1 x Br x and K 1 x Rb x I Mixed Crystals DOI: http://dx.doi.org/10.1103/PhysRev.184.874 JH Fertel,CH Perry - 《Phys Rev》 被引量: 86发表: 1969年 Oxygen Level Dependent Lattice Dynamics of Na0.73CoO2-δ The optical and acoustic phonon branches of Na0.73...
QD systems were thought to be very insensitive to inelastic scattering by low-energy acoustic phonons because of the absence of suited states between the QD discrete energy levels (bottleneck effect). However, previous studies of single QD lines have shown the persistence of some significant ...
For Raman spectroscopic study, the temperature-dependent shift in phonon energy has been frequently modelled by considering the decay of optical phonons into acoustic phonons with the same frequency but opposite momenta20,48,54. In this model, the temperature-dependent phonon energy can be expressed ...
Multi-gigahertz mechanical vibrations that stem from interactions between light fields and matter—known as acoustic phonons—have long been a subject of research. In recent years, specially designed functional devices have been developed to enhance the
Revised analysis of the mobility and ION degradation in high-κ gate stacks: Surface optical phonons vs. remote Coulomb scattering 来自 IEEEXplore 喜欢 0 阅读量: 51 作者:P Toniutti,P Palestri,D Esseni,L Selmi 摘要: We use Multi-Subband Monte Carlo simulations to understand which ...
Accordingly, Figure 2 for WSe2 single crystal shows the spectral variation of (hν)1/2 vs hν. Since the curves indicate discontinuous straight lines, it is quite possible that they represent indirect interband transitions involving the emission and absorption of phonons. In order to make ...
All-optical swtiching based on a three-order scattering of light by coherent acoustic phonons in single crystals An attempt is made to use the phenomenon of a two-phonon light scattering with direct transitions between all the optical modes in uniaxial single crystals... AS Shcherbakov,ET Rodri...
(VZn) increases to a certain level and then shifts to a higher wavelength. However, due to surface modulation, it is feasible to observe some other Raman modes at the nanoscale. The overtones of transverse acoustic phonons63for all samples except ZnS2 were identified as the sources of the ...