Electron transport and terahertz gain in quantum-dot cascades

被引：16

作者：

Vukmirovic, Nenad ^{[1
]}

Indjin, Dragan ^{[1
]}

Ikonic, Zoran ^{[1
]}

Harrison, Paul ^{[1
]}

机构：

[1] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 1-4期

关键词：

electron transport; quantum-cascade lasers (QCLs); quantum dots (QDs); terahertz;

D O I：

10.1109/LPT.2007.912533

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Electron transport through quantum-dot (QD) cascades was investigated using the formalism of nonequilibrium Green's functions within the self-consistent Born approximation. Polar coupling to optical phonons, deformation potential coupling to acoustic phonons, as well as anharmonic decay of longitudinal optical phonons were included in the simulation. A QD cascade laser structure comprising two QDs per period was designed and its characteristics were simulated. Significant values of population inversion enabling lasing in the terahertz frequency range were predicted, with operating current densities being more than an order of magnitude smaller than in existing terahertz quantum-well-based quantum-cascade lasers.

引用

页码：129 / 131

页数：3

共 21 条

[1] Electroluminescence of a quantum dot cascade structure [J].

Anders, S ;

Rebohle, L ;

Schrey, FF ;

Schrenk, W ;

Unterrainer, K ;

Strasser, G .

APPLIED PHYSICS LETTERS, 2003, 82 (22) :3862-3864

[2] Luminescence spectra of a quantum-dot cascade laser [J].

Apalkov, VM ;

Chakraborty, T .

APPLIED PHYSICS LETTERS, 2001, 78 (13) :1820-1822

[3] THEORETICAL CALCULATION OF LONGITUDINAL-OPTICAL-PHONON LIFETIME IN GAAS [J].

BHATT, AR ;

KIM, KW ;

STROSCIO, MA .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (06) :3905-3907

[4] Simulations of electric field domain suppression in a superlattice oscillator device using a distributed circuit model [J].

Daniel, ES ;

Gilbert, BK ;

Scott, JS ;

Allen, SJ .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 2003, 50 (12) :2434-2444

[5] Quantum cascade lasers based on quantum dot superlattice [J].

Dmitriev, IA ;

Suris, RA .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2005, 202 (06) :987-991

[6] Simulation of optically pumped intersubband laser in magnetic field [J].

Eric, Marko ;

Milanovic, Vitomir ;

Ikonic, Zoran ;

Indjin, Dragan .

SOLID STATE COMMUNICATIONS, 2007, 142 (10) :605-609

[7] Intersublevel electroluminescence from In0.4Ga0.6As/GaAs quantum dots in quantum cascade heterostructure with GaAsN/GaAs superlattice [J].

Fischer, CH ;

Bhattacharya, P ;

Yu, PC .

ELECTRONICS LETTERS, 2003, 39 (21) :1537-1538

[8]

Haug H., 1996, Quantum Kinetics in Transport and Optics of Semiconductors, DOI DOI 10.1007/978-3-540-73564-9

[9] Intersubband quantum-box semiconductor lasers [J].

Hsu, CF ;

O, JS ;

Zory, P ;

Botez, D .

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2000, 6 (03) :491-503

[10] Strain relaxation in stacked InAs/GaAs quantum dots studied by Raman scattering [J].

Ibáñez, J ;

Patanè, A ;

Henini, M ;

Eaves, L ;

Hernández, S ;

Cuscó, R ;

Artús, L ;

Musikhin, YG ;

Brounkov, PN .

APPLIED PHYSICS LETTERS, 2003, 83 (15) :3069-3071

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