TY - JOUR
T1 - Photoluminescence energy trend for ground and excited states in InAs quantum dots in InGaAs/GaAs QW structures
AU - Lozada, E. Velazquez
AU - Torchynska, T. V.
AU - Dybiec, M.
AU - Ostapenko, S.
AU - Eliseev, P. G.
AU - Stintz, A.
AU - Malloy, K. J.
PY - 2007
Y1 - 2007
N2 - This paper presents the photoluminescence study at 80K and scanning photoluminescence spectroscopy investigation of the ground and multi excited states at 80 and 300K in InAs quantum dots (QDs) inserted in symmetric In 0.15Ga0.85As/GaAs QW structures created at different QD growth temperatures. It is shown that some of the structures investigated exhibit a spatial long range variation of the average QD size in the QD ensemble across the sample. This long range QD size inhomogeneity was used for an investigation of the multi excited state energy trend versus ground state energy (or QD sizes). Experimental results were compared with the electron-hole level energy trend versus QD size predicted theoretically on the base of the 8-band k·p approach. Some anti correlation between experimental and theoretical results has been revealed and discussed.
AB - This paper presents the photoluminescence study at 80K and scanning photoluminescence spectroscopy investigation of the ground and multi excited states at 80 and 300K in InAs quantum dots (QDs) inserted in symmetric In 0.15Ga0.85As/GaAs QW structures created at different QD growth temperatures. It is shown that some of the structures investigated exhibit a spatial long range variation of the average QD size in the QD ensemble across the sample. This long range QD size inhomogeneity was used for an investigation of the multi excited state energy trend versus ground state energy (or QD sizes). Experimental results were compared with the electron-hole level energy trend versus QD size predicted theoretically on the base of the 8-band k·p approach. Some anti correlation between experimental and theoretical results has been revealed and discussed.
UR - http://www.scopus.com/inward/record.url?scp=41049094742&partnerID=8YFLogxK
U2 - 10.1002/pssc.200673343
DO - 10.1002/pssc.200673343
M3 - Artículo de la conferencia
AN - SCOPUS:41049094742
SN - 1862-6351
VL - 4
SP - 272
EP - 275
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
IS - 2
T2 - International Conference on Superlattices, Nano-structures and Nano-devices, ICSNN-2006
Y2 - 30 July 2006 through 4 August 2006
ER -