Localization of an Exciton in a Quantum Dot Molecule by an ac–dc Electric Field

2005 ◽  
Vol 2 (1) ◽  
pp. 154-160 ◽  
Author(s):  
Andreas F. Terzis ◽  
Emmanuel Paspalakis
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
Dc Electric Field

Dynamical properties of one-dimension quantum dot array in a DC electric field

2002 ◽  
Vol 296 (4-5) ◽  
pp. 222-228
Author(s):  
Ying Luo ◽  
Suqing Duan ◽  
Wen-Bin Fan ◽  
Xian-Geng Zhao ◽  
Li-Min Wang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
One Dimension ◽  
Dc Electric Field ◽  
Dynamical Properties

QUANTUM DOT SUPERLATTICES IN A CONSTANT ELECTRIC FIELD: LOCALIZATION AND BLOCH OSCILLATIONS

2002 ◽  
Vol 12 (02) ◽  
pp. 583-592 ◽  
Author(s):  
ROBERT A. SURIS ◽  
IVAN A. DMITRIEV
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
Constant Electric Field ◽  
Strong Dependence ◽  
Bloch Oscillations ◽  
Field Orientation ◽  
Dc Electric Field ◽  
Field Localization ◽  
2D And 3D ◽  
The Ideal

An analysis has been presented of electron localization in ideal 2D and 3D quantum dot superlattices (QDSL) in a homogeneous dc electric field and of Bloch oscillations in such structures. A very strong dependence of the ideal QDSL spectrum and wave functions on the field orientation is demonstrated. Bloch oscillations (BO) in QDSL are performed at two (or three for 3D QDSL) main Stark frequencies, which can be independently tuned by variation of field value and orientation. Due to the strong dependence of spectrum on field orientation, in QDSL intraminiband scattering processes can be almost totally suppressed. That allows to enlarge the BO lifetime by two orders of magnitude as compared with conventional quantum well superlattices.

Nonlinear photoacoustic effect of semiconductors in dc electric field

1990 ◽  
Vol 68 (8) ◽  
pp. 3865-3871 ◽  
Author(s):  
Jian‐chun Cheng ◽  
Shu‐yi Zhang ◽  
Yue‐sheng Lu
Keyword(s):  
Electric Field ◽  
Photoacoustic Effect ◽  
Dc Electric Field

POLARON IN A QUANTUM DOT UNDER AN ELECTRIC FIELD

2007 ◽  
Vol 21 (24) ◽  
pp. 1635-1642
Author(s):  
MIAN LIU ◽  
WENDONG MA ◽  
ZIJUN LI
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
Field Intensity ◽  
Ground State Energy ◽  
Ground State ◽  
Electric Field Intensity ◽  
State Energy ◽  
Theoretical Study ◽  
The Moment ◽  
Transformation Methods

We conducted a theoretical study on the properties of a polaron with electron-LO phonon strong-coupling in a cylindrical quantum dot under an electric field using linear combination operator and unitary transformation methods. The changing relations between the ground state energy of the polaron in the quantum dot and the electric field intensity, restricted intensity, and cylindrical height were derived. The numerical results show that the polar of the quantum dot is enlarged with increasing restricted intensity and decreasing cylindrical height, and with cylindrical height at 0 ~ 5 nm , the polar of the quantum dot is strongest. The ground state energy decreases with increasing electric field intensity, and at the moment of just adding electric field, quantum polarization is strongest.

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