Abstract
We present time-resolved photoluminescence measurements performed on an ensemble of InAs quantum dots with density of 1011 dots/cm2 and ground state transition energies centered at 1.216 eV. The wavelength of the 100fs excitation pulse was tuned through the ground (excited) state transitions, resulting in resonant (optical phonon assisted) photoluminescence (PL). The PL was detected with its polarization both parallel with and perpendicular to the excitation polarization (along one of the crystal's cleave axes). The decay of the PL was time-resolved with a streak camera in the interval 1.5 - 3ns to avoid scattered laser light. A strong polarization dependence was observed. Considerable amount of the resonant fluorescence signal and even of the non-resonant PL signatures remained linearly polarized on a nanosecond time scale. A phenomenological rate equation analysis is made.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 7597 |
| DOIs | |
| State | Published - 2010 |
| Event | Physics and Simulation of Optoelectronic Devices XVIII - San Francisco, CA, United States Duration: Jan 25 2010 → Jan 28 2010 |
Other
| Other | Physics and Simulation of Optoelectronic Devices XVIII |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 1/25/10 → 1/28/10 |
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Keywords
- Dephasing
- Quantum dots
- TEM
- TRPL
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Polarization conservation and dephasing in InAs quantum dot ensembles. / Chernikov, Alexej; Horst, Swantje; Koch, Stephan W; Chatterjee, Sangam; Rühle, Wolfgang W.; Sweet, Julian; Richards, Benjamin C.; Hendrickson, Joshua; Khitrova, Galina; Gibbs, Hyatt M.; Litvinov, Dimitri; Gerthsen, Dagmar; Wegener, Martin.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7597 2010. 75971R.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Polarization conservation and dephasing in InAs quantum dot ensembles
AU - Chernikov, Alexej
AU - Horst, Swantje
AU - Koch, Stephan W
AU - Chatterjee, Sangam
AU - Rühle, Wolfgang W.
AU - Sweet, Julian
AU - Richards, Benjamin C.
AU - Hendrickson, Joshua
AU - Khitrova, Galina
AU - Gibbs, Hyatt M.
AU - Litvinov, Dimitri
AU - Gerthsen, Dagmar
AU - Wegener, Martin
PY - 2010
Y1 - 2010
N2 - We present time-resolved photoluminescence measurements performed on an ensemble of InAs quantum dots with density of 1011 dots/cm2 and ground state transition energies centered at 1.216 eV. The wavelength of the 100fs excitation pulse was tuned through the ground (excited) state transitions, resulting in resonant (optical phonon assisted) photoluminescence (PL). The PL was detected with its polarization both parallel with and perpendicular to the excitation polarization (along one of the crystal's cleave axes). The decay of the PL was time-resolved with a streak camera in the interval 1.5 - 3ns to avoid scattered laser light. A strong polarization dependence was observed. Considerable amount of the resonant fluorescence signal and even of the non-resonant PL signatures remained linearly polarized on a nanosecond time scale. A phenomenological rate equation analysis is made.
AB - We present time-resolved photoluminescence measurements performed on an ensemble of InAs quantum dots with density of 1011 dots/cm2 and ground state transition energies centered at 1.216 eV. The wavelength of the 100fs excitation pulse was tuned through the ground (excited) state transitions, resulting in resonant (optical phonon assisted) photoluminescence (PL). The PL was detected with its polarization both parallel with and perpendicular to the excitation polarization (along one of the crystal's cleave axes). The decay of the PL was time-resolved with a streak camera in the interval 1.5 - 3ns to avoid scattered laser light. A strong polarization dependence was observed. Considerable amount of the resonant fluorescence signal and even of the non-resonant PL signatures remained linearly polarized on a nanosecond time scale. A phenomenological rate equation analysis is made.
KW - Dephasing
KW - Quantum dots
KW - TEM
KW - TRPL
UR - http://www.scopus.com/inward/record.url?scp=77953314100&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953314100&partnerID=8YFLogxK
U2 - 10.1117/12.841589
DO - 10.1117/12.841589
M3 - Conference contribution
AN - SCOPUS:77953314100
SN - 9780819479938
VL - 7597
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -