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Proceedings Paper

Effect of photon energy on the photoemission from nonlinear optical materials under different physical conditions
Author(s): Kamakhya Prasad Ghatak; Ardhendhu Ghoshal; Badal De
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Paper Abstract

In this paper an attempt is made to study the influence of photon energy on the photoernission from nonlinear optical materials from ultrathin films, cj,uantum well wires, quantum dots of the said material on the basis of a new dispersion law considerir all types of anisotropies of the band parameters within the framework of E' formalism. We have studied the photoeriisson from bulk specimens and also under the influence of an arbitrarily oriented quanti zing magne tic field in the same material tak ing n-C dGeAs as an example for the purpose of numerical computations. It is found that the photoemission increases with increasing carrier concentration non- linearly in all, the cases an oscillates with inverse magnetic field. The photoemission also increases with the incident photon energy, in a ladder like manner and exhibits oscillatory dependen- ces with Changirg film thickness in all types of quantum confine- ment. The well known results of three-band Kane model, two-band Kane model and that of parabolic model of nonlinear optical mate- rials have been obtained as special cases of our generalized theoretical formulations. The mathematical analysis is in agree- ment with the experimental observation as reported elsewhere.

Paper Details

Date Published: 1 November 1990
PDF: 23 pages
Proc. SPIE 1338, Optoelectronic Devices and Applications, (1 November 1990); doi: 10.1117/12.22983
Show Author Affiliations
Kamakhya Prasad Ghatak, Univ. of Jadavpur (India)
Ardhendhu Ghoshal, Univ. of Jadavpur (India)
Badal De, Hindustan Motors (United States)

Published in SPIE Proceedings Vol. 1338:
Optoelectronic Devices and Applications
Sriram Sriram, Editor(s)

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