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A Theoretical Evaluation of Optical Absorption Coefficient of a Quantum Wire as a Function of Photon Energy for Different Incident Optical Intensities

Priyanka Kumari1, Sangeeta Sinha2 and L. K. Mishra3

1D/o Shree Shambhu Sharma, C/o Shree R. P. Sharma, MIG 309 near Shivajee Park, Kankarbagh, Patna-800020 (Bihar), INDIA. 2Associate Professor, Department of Physics, A. N. College, Patna-800013 (Bihar), INDIA. 3Department of Physics, Magadh University, Bodh-Gaya-824234 (Bihar), INDIA.

ABSTRACT

Using the theoretical formalism of Reza Khordad [J. Theor & Appl. Phys, 6, 19(2012)] and R Khordad et al., [Commun. Theor Phys, 57, 1076(2012)], we have evaluated inter subband optical absorption coefficients of the wire as a function of photon energy. The evaluation has been performed in two ways: (1) Keeping length of the wire fixed and varying the incident optical intensity (2) Keeping incident optical intensity fixed and varying the length of the wire. We observed that in the first case the total absorption coefficients decreases with increase of the optical intensity. In the second case, the total absorption coefficients decrease as the quantum size increases. These results have great importance in the quantum confinement of the charge carriers of the nanostructured material. This work will also help in the fabrication of optoelectronics and photonic devices .Our theoretically evaluated results are in good agreement with the other theoretical workers.

Keywords : Low-dimensional semiconductor structures, Quantum wire, Single and multiple quantum wells, quantum dots, Quantum confinement, Optoelectronic and photonic devices, Parallelogram cross section, Inter suband optical absorption coefficients.