| Autor: |
Agrawal, Ratna, Vanshpal, Ravi, Dubey, Swati, Ghosh, S. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2224 Issue 1, p040004-1-040004-5, 5p |
| Abstrakt: |
In a polar semiconductor, the donor spectrum is influenced by the presence of electron-lattice coupling. In a non-piezoelectric polar semiconductor the donor electron is coupled to the Longitudinal optical (LO) phonons. If the semiconductor happens to be piezoelectric an additional contribution to the donor spectrum comes from the interaction between the electron and the Longitudinal acoustical (LA) phonons. In the present study we have explored the lowest order nonlinearity for the first time in laser irradiated piezopolar semiconductor. In order to study the polar contribution to the crystal bond in simple diatomic lattice, Callen effective charge parameter has been used. Effect of wave vector and doping concentrations on the absorption characteristics has been investigated. Numerical estimations have been made with a set of data appropriate for a semiconductor crystal (n-InSb) duly irradiated by a frequency doubled CO2 laser to establish the validity of the present work. Piezopolaronic effects are found to be favourable as compared to polaronic effects as far as amplification characteristics is concerned. This study is pertinent to a low cost parametric amplifier using n-InSb–CO2 system. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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