Quantum dimensionality, entropy, and the modulation response of quantum dot lasers

Authors
Deppe, DG Huffaker, DL
Citation
Dg. Deppe et Dl. Huffaker, Quantum dimensionality, entropy, and the modulation response of quantum dot lasers, APPL PHYS L, 77(21), 2000, pp. 3325-3327
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
77
Issue
21
Year of publication
2000
Pages
3325 - 3327
Database
ISI
SICI code
0003-6951(20001120)77:21<3325:QDEATM>2.0.ZU;2-2
Abstract
Rate equations are used to show that the modulation response of quantum dot lasers can be limited by entropy change due to carrier relaxation from a w etting layer. The entropy change is due to the difference in the spectral d ensity of quantum states between the two-dimensional wetting layer and the zero-dimensional quantum dot. When limited by this effect, the laser's 3 dB modulation response becomes strongly temperature dependent. (C) 2000 Ameri can Institute of Physics. [S0003-6951(00)02647-4].