Effect of diffusion on acoustic deformation potential characterization through coherent acoustic phonon dynamics
|Joint first author||He，Feng|
Ultrafast spectroscopy of coherent acoustic phonon (CAP) dynamics has recently been proposed as a method to characterize acoustic deformation potential (ADP), a key standard to quantify carrier-acoustic phonon coupling in semiconductors. In this Letter, we illustrate the importance of addressing the diffusion effect in ADP characterization by this method, using Ge as the demonstration system. It is found that the ADP mechanism and the thermoelastic effect have comparable contributions to CAP generation in Ge. Due to the different dependences on pump photon energies, the roles of these two mechanisms were assessed by varying pump wavelengths, based on which the ADP coupling constant of Ge was obtained. The analysis reveals that the carrier diffusion has a considerable impact on the shape of the CAP wave packet and must be processed cautiously for the ADP characterization for Ge.
First ; Corresponding
Guangdong Basic and Applied Basic Research Foundation[
|WOS Research Area|
Materials Science ; Physics
Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
|WOS Accession No|
|EI Accession Number|
Acoustic Spectroscopy ; Deformation ; Phonons
|ESI Classification Code|
Acoustic Properties Of Materials:751.2
|ESI Research Field|
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Mechanical and Energy Engineering|
1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Microelectronics,Shenzhen Institute of Information Technology,Shenzhen,518172,China
3.State Key Laboratory on Tunable Laser Technology,School of Electronics and Information Engineering,Harbin Institute of Technology,Shenzhen,518055,China
4.Shenzhen JL Computational Science and Applied Research Institute,Shenzhen,518131,China
5.Beijing Computational Science Research Center,Beijing,100193,China
6.Key Laboratory of Energy Conversion and Storage Technologies,Ministry of Education,Shenzhen,518055,China
|First Author Affilication||Department of Mechanical and Energy Engineering|
|Corresponding Author Affilication||Department of Mechanical and Energy Engineering|
|First Author's First Affilication||Department of Mechanical and Energy Engineering|
Li，Long,He，Feng,Zhao，Xu,et al. Effect of diffusion on acoustic deformation potential characterization through coherent acoustic phonon dynamics[J]. Physical Review B,2022,106(6):L060304.
Li，Long,He，Feng,Zhao，Xu,Tong，Zhen,&Guo，Liang.(2022).Effect of diffusion on acoustic deformation potential characterization through coherent acoustic phonon dynamics.Physical Review B,106(6),L060304.
Li，Long,et al."Effect of diffusion on acoustic deformation potential characterization through coherent acoustic phonon dynamics".Physical Review B 106.6(2022):L060304.
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|2022-Effect of diffu（726KB）||Restricted Access||--|
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