Photoluminescence of two-dimensional excitons in an electric field: Lifetime enhancement and field ionization in GaAs quantum wells

1988 ◽  
Vol 38 (8) ◽  
pp. 5496-5503 ◽  
Author(s):  
K. Köhler ◽  
H.-J. Polland ◽  
L. Schultheis ◽  
C. W. Tu
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Field Ionization ◽  
Two Dimensional ◽  
Lifetime Enhancement

Electric-field-dependent absorption of ZnSe-based quantum wells: The transition from two-dimensional to three-dimensional behavior

1998 ◽  
Vol 58 (16) ◽  
pp. 10709-10720 ◽  
Author(s):  
D. Merbach ◽  
E. Schöll ◽  
W. Ebeling ◽  
P. Michler ◽  
J. Gutowski
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Field Dependent ◽  
Dependent Absorption

Influence of electric field on interwell tunneling rate in quasi two dimensional organic quantum wells

2000 ◽  
Vol 113 (17) ◽  
pp. 7606-7612 ◽  
Author(s):  
K. J. Donovan ◽  
J. E. Elliott ◽  
I. S. Jeong ◽  
K. Scott ◽  
E. G. Wilson
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Tunneling Rate ◽  
Two Dimensional

Enhanced Dissociation of Hot Excitons with an Applied Electric Field under Low-Power Photoexcitation in Two-Dimensional Perovskite Quantum Wells

2019 ◽  
Vol 10 (16) ◽  
pp. 4752-4757 ◽  
Author(s):  
Vidya Kattoor ◽  
Kamlesh Awasthi ◽  
Efat Jokar ◽  
Eric Wei-Guang Diau ◽  
Nobuhiro Ohta
Keyword(s):  
Electric Field ◽  
Low Power ◽  
Quantum Wells ◽  
Applied Electric Field ◽  
Two Dimensional

scholarly journals Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells

2019 ◽  
Vol 114 (23) ◽  
pp. 232102 ◽  
Author(s):  
K. Shibata ◽  
M. Karalic ◽  
C. Mittag ◽  
T. Tschirky ◽  
C. Reichl ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Two Dimensional

scholarly journals Модель терагерцового квантово-каскадного лазера на основе двумерного плазмона

2021 ◽  
Vol 55 (10) ◽  
pp. 869
Author(s):  
А.А. Дубинов ◽  
В.Я. Алешкин
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Quantum Wells ◽  
Active Medium ◽  
Electron Concentration ◽  
Two Dimensional ◽  
Quantum Cascade ◽  
Strong Localization ◽  
Cascade Structure ◽  
Quantum Cascade Structure

In this work, we calculated the characteristics of a two-dimensional plasmon amplified by an active medium based on a terahertz quantum-cascade structure. It is shown that for realistic parameters of GaAs/AlGaAs structures with quantum wells (mobility 2×105 cm2V-1s-1 at an electron concentration of 5×1011 cm-2 and at temperatures up to 77 K), the gain of a two-dimensional plasmon can reach 1500 cm-1 for frequency 2.3 THz. In addition, due to the strong localization of the plasmon electric field near the quantum well, only a few cascades of the active medium are required for amplification.

Field-assisted ionization theory for microscopists

1994 ◽  
Vol 52 ◽  
pp. 820-821
Author(s):  
Patrick P. Camus
Keyword(s):  
Electric Field ◽  
Electron Tunneling ◽  
Ionization Probability ◽  
Critical Distance ◽  
Tunneling Probability ◽  
Field Ionization ◽  
Radius Of Curvature ◽  
Field Evaporation ◽  
A Value ◽  
Ion Emission

The theory of field ion emission is the study of electron tunneling probability enhanced by the application of a high electric field. At subnanometer distances and kilovolt potentials, the probability of tunneling of electrons increases markedly. Field ionization of gas atoms produce atomic resolution images of the surface of the specimen, while field evaporation of surface atoms sections the specimen. Details of emission theory may be found in monographs.Field ionization (FI) is the phenomena whereby an electric field assists in the ionization of gas atoms via tunneling. The tunneling probability is a maximum at a critical distance above the surface,xc, Fig. 1. Energy is required to ionize the gas atom at xc, I, but at a value reduced by the appliedelectric field, xcFe, while energy is recovered by placing the electron in the specimen, φ. The highest ionization probability occurs for those regions on the specimen that have the highest local electric field. Those atoms which protrude from the average surfacehave the smallest radius of curvature, the highest field and therefore produce the highest ionizationprobability and brightest spots on the imaging screen, Fig. 2. This technique is called field ion microscopy (FIM).

Biaxial strain, electric field and interlayer distance-tailored electronic structure and magnetic properties of two-dimensional g-C3N4/Li-adsorbed Cr2Ge2Te6 van der Waals heterostructures

2021 ◽  
Vol 23 (10) ◽  
pp. 6171-6181
Author(s):  
Yaoqi Gao ◽  
Baozeng Zhou ◽  
Xiaocha Wang
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Electric Field ◽  
Van Der Waals ◽  
Interlayer Distance ◽  
Two Dimensional ◽  
Biaxial Strain ◽  
Van Der Waals Heterostructures

It is found that the biaxial strain, electric field and interlayer distance can effectively modulate the electronic structure and magnetic properties of two-dimensional van der Waals heterostructures.

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