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Energy level scheme...
Energy level scheme of InAs/InxGa1-xAs/GaAs quantum-dots-in-a-well infrared photodetector structures
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- Höglund, Linda, 1974- (author)
- Acreo AB
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- Karlsson, Fredrik (author)
- Linköpings universitet,Halvledarmaterial,Tekniska högskolan,IFM, Linköping University
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- Holtz, Per-Olof, 1951- (author)
- Linköpings universitet,Tekniska högskolan,Halvledarmaterial,IFM, Linköping University
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- Pettersson, Håkan (author)
- Högskolan i Halmstad,Tillämpad matematik och fysik (MPE-lab),Nanovetenskap,Center for Applied Mathematics and Physics, Halmstad University, Box 823, S-30118 Halmstad, Sweden/Solid State Physics and the Nanometer Consortium, Lund University, Box 118, S-22100 Lund, Sweden
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- Pistol, Mats-Erik (author)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Avd. f. Fasta Tillståndets Fysik, Lunds Universitet,Nanometerkonsortiet
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- Wang, Qin (author)
- Acreo AB, Electrum 236, S-16440 Kista, Sweden
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- Almqvist, Susanne (author)
- Acreo AB, Electrum 236, S-16440 Kista, Sweden
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- Asplund, Carl (author)
- IRnova, Electrum 236, S-16440 Kista, Sweden
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- Malm, Hedda (author)
- IRnova, Electrum 236, S-16440 Kista, Sweden
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- Petrini, Erik (author)
- Acreo AB, Electrum 236, S-16440 Kista, Sweden
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- Andersson, Jan (author)
- Acreo AB, Electrum 236, S-16440 Kista, Sweden
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- Pistol, L.E. (author)
- Lund University
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(creator_code:org_t)
- Woodbury, NY : American Physical Society, 2010
- 2010
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - Woodbury, NY : American Physical Society. - 1098-0121 .- 1550-235X. ; 82:3, s. 035314-
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Abstract
Subject headings
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- A thorough investigation of quantum-dots-in-a-well structures for infrared photodetector applications has been performed employing different experimental techniques. The electronic structure of self-assembled InAs quantum dots embedded in an In0.15Ga0.85As/GaAs quantum well (QW) was deduced from photoluminescence (PL) and PL excitation (PLE) spectroscopy. From polarization-dependent PL it was revealed that the quantum dots hold two electron energy levels and two heavy-hole levels. Tunnel capacitance spectroscopy confirmed an electron energy level separation of about 50 meV, and additionally, that the conduction-band ground state and excited state of the dots are twofold and fourfold degenerates, respectively. Intersubband photocurrent spectroscopy, combined with simultaneous interband pumping of the dots, revealed a dominant transition at 150 meV (8.5 mu m) between the ground state of the quantum dots and the excited state of the QW. Results from detailed full three-dimensional calculations of the electronic structure, including effects of composition intermixing and interdot interactions, confirm the experimentally unravelled energy level scheme of the dots and well.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Övrig annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)
Keyword
- Dot-in-well
- quantum dots
- photodetectors
- Semiconductor physics
- Halvledarfysik
- Material physics with surface physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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Höglund, Linda, ...
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Karlsson, Fredri ...
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Holtz, Per-Olof, ...
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Pettersson, Håka ...
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Pistol, Mats-Eri ...
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Wang, Qin
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Almqvist, Susann ...
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Asplund, Carl
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Malm, Hedda
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Petrini, Erik
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Andersson, Jan
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Pistol, L.E.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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ENGINEERING AND ...
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Halmstad University
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Lund University
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Linköping University