Electro-modulation enhancement in the InGaNAs/GaAs quantum well structures

J. R. Lee, C. R. Lu, H. L. Liu, H. H. Lin, L. W. Sun

Research output: Contribution to journalConference articlepeer-review


Electrooptical properties of InGaNAs/GaAs quantum well structures were investigated by photoreflectance spectroscopy. The MBE grown structures consist of a central InGa-NAs well, GaAs barriers, and GaAsN strain compensating buffer layers of different thickness. More quantum states and extended wave functions in the system with strain relief GaAsN barriers due to broader and lower confinement profile. Particular electro-modulated spectral features corresponding to excitonic interband transitions are enhanced. Compared with the numerically calculated quantum state energies and wave functions, the electromodulation enhanced transitions were those involving quantum states with wave functions distribute in wider regions and extend more from the InGaNAs well into the space charge region near interfaces. It was the internal electric field near the heterointerfaces strongly enhanced the electro-modulation efficiency.

Original languageEnglish
Pages (from-to)3054-3056
Number of pages3
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number9
Publication statusPublished - 2008
Event34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan
Duration: 2007 Oct 152007 Oct 18

ASJC Scopus subject areas

  • Condensed Matter Physics


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