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<strong>Amplitude modulation and demodulation of a coherent electromagnetic wave in magnetized doped III-V semiconductors</strong>

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Title Statement <strong>Amplitude modulation and demodulation of a coherent electromagnetic wave in magnetized doped III-V semiconductors</strong>
 
Added Entry - Uncontrolled Name Sangwan, Anita ; Department of Physics Singhania University Pacheri Bari, Jhunjunu Rajasthan
Singh, Navneet ; Department of Physics, Rajiv Gandhi Government College for Women, Bhiwani
 
Uncontrolled Index Term Amplitude modulation/demodulation; Diffusion; Acousto-electric effects; III-V semiconductors
 
Summary, etc. <span>This present paper is concerned with the analytical study of the amplitude modulation and demodulation of a coherent electromagnetic wave in magnetized doped III-V semiconductors. Utilizing the hydrodynamic model of a semiconductor plasma, the modulation indices for upper (+) and lower (–) side bands have been obtained. The incorporation of carrier diffusion in the nonlinear laser-semiconductor interaction adds new dimension to the analysis. The numerical estimations have been made for n-InSb crystal at liquid nitrogen temperature illuminated by frequency doubled pulsed 10.6 µm CO</span><span>2</span><span> laser. The problem has been analyzed in two different wave regimes (in the presence as well as absence of phenomenological acoustic damping parameter (Γ</span><span>a</span><span>) over a wide range of externally applied magnetic field (incorporated in terms of cyclotron frequency ω</span><span>c</span><span>). The results indicate that in absence of damping parameter, the absorption of coherent electromagnetic radiation takes place completely in all possible wavelength regimes when ω</span><span>c</span><span>~ (v</span><span>2</span><span> + ω</span><img src="http://www.niscair.res.in/jinfo/equation165.gif" border="0" alt="" /><span>)</span><span>1/2</span><span>; v and ω</span><span>0</span><span> being the electron collision frequency and pump frequency, respectively. Moreover, the carrier diffusion modifies amplitude modulation and demodulation processes significantly. The damping parameter additionally assumes a significant role in choosing the range of parameters and selecting the modulated side band mode.</span>
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2020-09-07 10:42:51
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/31381
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 58, ##issue.no## 7 (2020): Indian Journal of Pure & Applied Physics
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/31381/465496864
 
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