scholarly journals Infra-Red Tunneling Absorption in Semiconductor Double Quantum Wells in Tilted Magnetic Fields

1996 ◽  
Vol 450 ◽  
Author(s):  
S. K. Lyo
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Linear Response ◽  
Resonance Energy ◽  
Linear Response Theory ◽  
Energy Difference ◽  
Double Quantum ◽  
Absorption Intensity ◽  
Double Quantum Well ◽  
Infra Red

ABSTRACTUsing a linear response theory, interwell-tunneling absorption of infra-red photons is calculated in a double-quantum-well structure with a wide center barrier in tilted magnetic fields. Tunneling occurs between the ground sublevels of the two quantum wells, with an energy difference that is tunable. The absorption intensity depends strongly on the temperature and the carrier densities. The resonance width is narrow even at high temperatures due to the two-dimensional phase restriction for tunneling. In magnetic fields, both the in-plane and perpendicular components of the field sensitively control and tune the absorption lineshape in very different ways, affecting the absorption threshold, the resonance energy of absorption, and the linewidth.

Electronic States in Cd1−xZnxTe/CdTe Strained Layer Coupled Double Quantum Wells and their Photoluminescence

1994 ◽  
Vol 358 ◽  
Author(s):  
Tiesheng Li ◽  
H. J. Lozykowski
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Lattice Mismatch ◽  
Electronic States ◽  
Double Quantum ◽  
Strain Effect ◽  
Strained Layer ◽  
Quantum Well Structure ◽  
Double Quantum Well ◽  
Theoretical Investigations

ABSTRACTExperimental and theoretical investigations of electronic states in a strained-layer CdTe/CdZnTe coupled double quantum well structure are presented. The optical properties of this lattice mismatched heterostructure were characterized by photoluminescence (PL), PL excitation and polarization spectroscopies. The influence of electrical field on exciton states in the strained layer CdTe/CdZnTe coupled double quantum well structure is experimentally studied. The confined electronic states were calculated in the framework of the envelope function approach, taking into account the strain effect induced by the lattice-mismatch. Experimental results are compared with the calculated transition energies.

Luminescence of double quantum wells subject to in-plane magnetic fields

2005 ◽  
Vol 72 (16) ◽  
Author(s):  
M. Orlita ◽  
R. Grill ◽  
P. Hlídek ◽  
M. Zvára ◽  
G. H. Döhler ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Double Quantum

GIANT THIRD-ORDER KERR NONLINEARITIES AND SLOW OPTICAL SOLITONS IN DOUBLE QUANTUM-WELL

2010 ◽  
Vol 24 (17) ◽  
pp. 1899-1905
Author(s):  
XUN XIAO
Keyword(s):  
Quantum Wells ◽  
Probe Pulse ◽  
Optical Solitons ◽  
Double Quantum ◽  
Third Order ◽  
Raman Resonance ◽  
Linear Absorption ◽  
Two Photon ◽  
Double Quantum Well ◽  
Slow Group

We show the formation of slow optical solitons in the asymmetric coupled double quantum wells (CQW) via a two-photon Raman resonance. With the consideration of real parameters in AlGaAs -based CQW, we indicate the possibility to have cancelation of the linear absorption, giant Kerr nonlinearities, and slow group velocity propagation of the weak probe pulse at the same one-photon detuning frequency around several THz .

A THEORETICAL AND EXPERIMENTAL STUDY OF ELECTRONIC CONFINEMENT, COUPLING, AND TRANSLAYER INTERACTION IN NOBLE-METAL QUANTUM-WELL STRUCTURES

1994 ◽  
Vol 08 (18) ◽  
pp. 1075-1096 ◽  
Author(s):  
W. E. MCMAHON ◽  
T. MILLER ◽  
T.-C. CHIANG
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Noble Metal ◽  
Experimental Studies ◽  
Surface States ◽  
Double Quantum ◽  
Multilayer Systems ◽  
Quantum Well Structures ◽  
Double Quantum Well ◽  
Bloch Electrons

Noble-metal multilayer systems have been grown and examined with angle-resolved photoemission. Surface states, and single and double quantum wells have been studied experimentally; the results can be explained with a simple theoretical model based upon Bloch electrons. In this paper, we will present our model and then give a description of some experimental studies which utilize the model. In particular, we will consider double-quantum-well systems which can be used to examine basic aspects of electronic confinement, layer–layer coupling, and translayer interaction through a barrier.

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