Luminescence spectra of a quantum-dot cascade laser | Zendy

Vadym Apalkov | Zendy; Tapash Chakraborty | Zendy

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Luminescence spectra of a quantum-dot cascade laser

Author(s) -

Vadym Apalkov,

Tapash Chakraborty

Publication year - 2001

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1357808

Subject(s) - quantum dot , lasing threshold , quantum dot laser , luminescence , quantum cascade laser , laser , spectral line , spectroscopy , principal quantum number , molecular physics , electron , cascade , emission spectrum , atomic physics , blueshift , physics , chemistry , photoluminescence , quantum well , optoelectronics , quantum , optics , quantum mechanics , quantum dissipation , chromatography

A quantum cascade laser where the quantum wells in the active regions arereplaced by quantum dots with their atom-like discrete energy levels is aninteresting system to study novel features in optical spectroscopy. We studystructures suitable for diagonal lasing transitions in coupled dots, andvertical lasing transitions in a single dot, in the active regions of the laserdevice. The luminescence spectra as a function of electron number and dot sizeshow that for diagonal transitions, a significant amount of blue-shift in theemission spectra can be achieved by increasing electron population in thequantum dots as well as by decreasing the size of the dots.Comment: 5 pages, 4 figure

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