Optical transitions in parabolic GaAs/Ga1-xAlxAs superlattices

2001-07-01
Erkoç, Şakir
Kokten, H
We have performed self-consistent field (SCF) calculations of the electronic structure of GaAs/Ga1-xAlxAs superlattices with parabolic potential profile within the effective mass theory. We have calculated the optical transition matrix elements involving transitions from the hole states to the electron states, and we have also computed the oscillator strength matrix elements for the transitions among the electron states.
SURFACE REVIEW AND LETTERS

Suggestions

Optical transitions in InSe/GaSe superlattices
Katırcıoğlu, Şenay; Allahverdi, K (1998-06-22)
We have performed self-consistent-field (SCF) calculations of the electronic structure of InSe/GaSe superlattices with square-well potential profile within the effective-mass theory. We have calculated the optical transition matrix elements involving transitions from the hole states to electron states, and we have also computed the oscillates strength matrix elements for the transitions among the electron states. (C) 1998 Elsevier Science S.A. All rights reserved.
Angle of graph energy - A spectral measure of resemblance of isomeric molecules
Gutman, I; Türker, Burhan Lemi (2003-11-01)
A method, elaborated earlier by one of the present authors, for measuring the structural resemblance of isomeric alternant conjugated hydrocarbons, based on a graph-spectral quantity theta, called the angle of total pi-electron energy approach has been extended now to arbitrary molecules. Some general properties of theta have been established.
Broadband THz Modulators Based on Multilayer Graphene on PVC
KAYA, Emine; Kakenov, Nurbek; Kocabas, Coskun; Altan, Hakan; Esentürk, Okan (2016-09-30)
In this study we present the direct terahertz timedomain spectroscopic measurement of CVD-grown multilayer graphene (MLG) on PVC substrate with an electrically tunable Fermi level. In a configuration consisting MLG and injected organic dopant, the transmitted intensity loss of terahertz radiation was observed with an applied voltage between 0 and 3.5 V.We showed that MLG on PVC devices provided approximately 100 % modulation between 0.2 and 1.5 THz at preferentially low operation voltage of ca. 3V. The obse...
Energy spectrum of a 2D Dirac oscillator in the presence of a constant magnetic field and an antidot potential
Akçay, Hüseyin; Sever, Ramazan (2016-07-04)
We investigate the energy spectrum and the corresponding eigenfunctions of a 2D Dirac oscillator confined by an antidot potential in the presence of a magnetic field and Aharonov-Bohm flux field. Analytical solutions are obtained and compared with the results of the Schrodinger equation found in the literature. Further, the dependence of the spectrum on the magnetic quantum number and on the repulsive potential is discussed.
Nonlinear optical properties of semiconductor heterostructures
Yıldırım, Hasan; Tomak, Mehmet; Department of Physics (2006)
The nonlinear optical properties of semiconductor heterostructures, such as GaAsAl/GaAs alloys, are studied with analytic and numerical methods on the basis of quantum mechanics. Particularly, second and third-order nonlinear optical properties of quantum wells described by the various types of confining potentials are considered within the density matrix formalism. We consider a Pöschl-Teller type potential which has been rarely considered in this area. It has a tunable asymmetry parameter, making it a goo...
Citation Formats
Ş. Erkoç and H. Kokten, “Optical transitions in parabolic GaAs/Ga1-xAlxAs superlattices,” SURFACE REVIEW AND LETTERS, pp. 321–325, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56827.