Title :
Effect of barrier asymmetry on tunneling current in double barrier quantum well structure
Author :
Mukherjee, Kasturi ; Das, N.R.
Author_Institution :
Inst. of Radio Phys. & Electron., Univ. of Calcutta, Kolkata, India
Abstract :
In this paper, the current-voltage characteristics of a double barrier quantum well structure has been studied. The current through the structure has been calculated after obtaining the transmission coefficient using quantum mechanical approach. The effect of barrier height asymmetry as well as barrier width non-uniformity on the tunneling current density has been investigated. The results indicate suitable designs to obtain high current density and desired peak-to-valley ratio.
Keywords :
conduction bands; current density; quantum wells; tunnelling; barrier asymmetry effect; barrier width effect; conduction band offset symmetry; current-voltage characteristics; double barrier quantum well structure; peak-to-valley ratio; quantum mechanical approach; transmission coefficient; tunneling current density; Boundary conditions; Current density; Current-voltage characteristics; Electrons; Photonic band gap; Physics; Quantum cascade lasers; Quantum mechanics; Tunneling; Wave functions; Propagation matrix; asymmetry; double barrier; quantum well; transmission coefficient; tunneling current;
Conference_Titel :
Emerging Trends in Electronic and Photonic Devices & Systems, 2009. ELECTRO '09. International Conference on
Conference_Location :
Varanasi
Print_ISBN :
978-1-4244-4846-3
DOI :
10.1109/ELECTRO.2009.5441069
