Absorption Spectra of Artificial Atoms in Presence of THz Fields

Artificial atoms are growing fields of interest due to their physical and optoelectronicapplications. The absorption spectra of the proposed artificial atom inpresence of Tera-Hertz field is investigated theoretically. We use the non-perturbativeFloquet theory and finite difference method to study the electronic structure of ArtificialAtom. The effect of static electric field on the energy levels of artificial atom is studied.The effect of orientation of static electric field on energy levels and diploe matrix elementsis also highlighted.

• B. Dahiya
• K.Batra
• V.Prasad

• Absorption spectra
• Artificial atom
• Floquet Theory
• THz fields

[1] T. Raz, D. Ritter, and G. Bahir, "Formation of InAs self-assembled
quantum rings on InP," Appl. Phys. Lett., vol. 82, pp. 1706-1708, March
2003
[2] D. Granados and J. M. Garcia, "In(Ga)As self-assembled quantum ring
formation by molecular beam epitaxy," Appl. Phys. Lett., vol. 82, pp.
2401-2403, April 2003
[3] V.Prasad and P. Silotia, "Effect of laser radiation on optical properties of
disk shaped quantum dot in magnetic fields," Phys. Lett. A, vol. 375, pp.
3910-3915, October 2011
[4] V. Prasad and B. Dahiya, "Modifications of laser field assisted
intersubband transitions in the coupled quantum wells due to static
electric field," Physica Status Solidi B, vol. 248, pp. 1727-1734, July
2011
[5] N. Kirstaedter, O. G. Schmidt, N. N. Ledentsov, D. Bimberg, V. M.
Ustinov, A. Yu. Egorov, A. E. Zhukov, M. V. Maximov, P. S. Kopev,
and Zh. I. Alferov, "Gain and differential gain of single layer
InAs/GaAs quantum dot injection lasers," Appl. Phys. Lett., vol. 69, pp.
1226-1228, August 1996
[6] D. Bimberg, "Quantum dots for lasers, amplifiers and computing," J.
Phys. D, vol. 38, pp. 2055-2058, July 2005 and references therein
[7] D. Loss and D.P. DiVincenzo, "Quantum computation with quantum
dots," Phys. Rev. A, vol. 57, pp. 120-126, January 1998 and references
therein
[8] K. R. Brown, D. A. Lidar, and K. B. Whaley, "Quantum computing with
quantum dots on quantum linear supports," Phys. Rev. A, vol. 65, pp.
012307(19 pages), December 2001
[9] S. Maimon, E. Finkman, G. Bahir, S. E. Schacham, J. M. Garcia, and P.
M. Petroff, "Intersublevel transitions in InAs/GaAs quantum dots
infrared photodetectors ," Appl. Phys. Lett., vol. 73, pp. 2003-2005,
October 1998
[10] Eui-Tae Kim, A. Madhukar, Z. Ye and J. C. Campbell, "High
detectivityInAs quantum dot infrared photodetectors," Appl. Phys. Lett.,
vol. 84, pp. 3277-3279, April 2004
[11] D. Ahn and S.L. Chuang, "Calculation of linear and nonlinear
intersubband optical absorptions in a quantum well model with an
applied electric field," IEEE J. Quantum Electron., vol. QE-23, pp.
2196-2204, December 1987
[12] X. Zhang, G. Xiong and X. Feng, "Well width-dependent third-order
optical nonlinearities of a ZnS/CdSe cylindrical quantum dot quantum
well," Physica E, vol. 33, pp. 120-124, June 2006
[13] I. Karabulut, S. Unlu and H. Safak, "Calculation of the changes in the
absorption and refractive index for intersubband optical transitions in a
quantum box," Physica Status Solidi B, vol. 242, pp. 2902-2909,
November 2005
[14] U. Banin, Y.W. Cao, D. Katz and O. Millo, "Identification of atomiclike
electronic states in indium arsenide nanocrystal quantum dots,"
Nature, vol. 400, pp.542-544, August 1999
[15] A. P. Alivisatos, "Semiconductor Clusters, Nanocrystals, and Quantum
Dots," Science, vol. 271, pp. 933-937, February 1996
[16] M. A. Kastner, "Artificial Atoms," Phys. Today, vol. 46(1), pp. 24-31,
January 1993
[17] R.C. Ashoori, "Electrons in artificial atoms," Nature, vol. 379, pp. 413-
419, February 1996
[18] A.D. Stone and H. Bruus, "Chaos and fluctuations in quantum dots,"
Physica B, vol. 189, pp. 43-56, June 1993
[19] J. L. Liu, Y. S. Tang, K. L. Wang, T. Radetic, and R. Gronsky, "Raman
scattering from a self-organized Ge dot superlattice," Appl. Phys. Lett.,
vol. 74, pp. 1863-1865, March 1999
[20] J. L. Liu, W. G. Wu, A. Balandin, G. L. Jin, and K. L. Wang,
"Intersubband absorption in boron-doped multiple Ge quantum dots,"
Appl. Phys. Lett., vol. 74, pp. 185-187, January 1999
[21] S. Abdi-Ben Nasrallah, A. Bouazra, A. Poncet, and M. Said,
"Theoretical investigation of intersubband transition energies and
oscillator strength in CdS/SiO2 quantum dots," Physica E, vol. 43, pp.
146-150, November 2010
[22] J. H. Shirley, "Solution of the Schrödinger Equation with a Hamiltonian
Periodic in Time," Phys. Rev., vol. 138, pp. B979-B987, May 1965
[23] Shih-I Chu, "Recent Developments in Semiclassical Floquet Theories
for Intense-Field Multiphoton Processes," Adv. At. Mol. Phys., vol. 21,
pp. 197-253, July 1985
[24] M. Mohan and V. Prasad, "Laser-assisted vibrational excitations during
ion-molecule collisions," J. Phys. B, vol. 24, pp. L81-L87, February
1991
[25] V. Prasad, B. Sharma and M. Mohan, "Excitation of atomic hydrogen
due to proton impact in the presence of a resonant laser field,"
PhysicaScripta, vol. 52, pp. 372-376, April1995
[26] U. Arya, B. Dahiya and V. Prasad, "l-Mixing Collision in Presence of
Microwave Field," J. Mod. Phys., vol. 3, pp. 28-36, January 2012
[27] T. B. Boykin and G. Klimeck, "The discretized Schrödinger equation
and simple models for semiconductor quantum wells," Eur. J. Phys.,
vol. 25, pp. 503-514, July 2004
[28] W. H. Ng and K. S. Chan, "An analytical expression for quantum-well
tunneling lifetimes ," J. Appl. Phys., vol. 93, pp. 2630-2637, March
2003
[29] M. Gudwani, V. Prasad, P. K. Jha, and M. Mohan, "Intersubband
Transitions in Coupled Quantum wells under an intense Laser Field,"
Int. J. Nanosci., vol. 7, pp. 215-221, August 2008
[30] Zhi-Hai Zhang, Kang-Xian Guo, Bin Chen, Rui-Zhen Wang, Min-Wu
Kang, "Third-harmonic generation in cubical quantum dots," Superlattices
and Microstructures, vol. 46, pp. 672-678, October 2009