Abstract
Language | English |
---|---|
Pages | 55-60 |
Number of pages | 6 |
Journal | MRS Communications |
Volume | 2 |
Issue number | 2 |
DOIs | |
Publication status | Published - 15 Jun 2012 |
Fingerprint
Keywords
- quantum wells (QWs)
- quantum-confined stark effect (QCSE)
Cite this
}
Carrier-induced nonlinearities in InGaN/GaN quantum wells with V-pits. / Mahat, Meg; Llopis, Antonio; Schaller, Richard; Watson, Ian; Pereira, Sergio Manuel De Sousa; Neogi, Arup.
In: MRS Communications, Vol. 2, No. 2, 15.06.2012, p. 55-60.Research output: Contribution to journal › Article
TY - JOUR
T1 - Carrier-induced nonlinearities in InGaN/GaN quantum wells with V-pits
AU - Mahat, Meg
AU - Llopis, Antonio
AU - Schaller, Richard
AU - Watson, Ian
AU - Pereira, Sergio Manuel De Sousa
AU - Neogi, Arup
PY - 2012/6/15
Y1 - 2012/6/15
N2 - Ultrafast differential transmission spectroscopy was employed to study the carrier dynamics in InGaN/GaN multiple quantum wells with high inverted hexagonal pits density due to threading dislocation. By monitoring the temporal evolution of the excitonic absorption spectrum, a reduction of the quantum-confinement Stark shift was observed due to the photo-induced in-well field screening at low carrier densities and excitonic absorption quenching at high carrier densities. By comparing the differential absorption spectra at various injected carrier densities, the in-well field screening effect was distinguished from excitonic bleaching.
AB - Ultrafast differential transmission spectroscopy was employed to study the carrier dynamics in InGaN/GaN multiple quantum wells with high inverted hexagonal pits density due to threading dislocation. By monitoring the temporal evolution of the excitonic absorption spectrum, a reduction of the quantum-confinement Stark shift was observed due to the photo-induced in-well field screening at low carrier densities and excitonic absorption quenching at high carrier densities. By comparing the differential absorption spectra at various injected carrier densities, the in-well field screening effect was distinguished from excitonic bleaching.
KW - quantum wells (QWs)
KW - quantum-confined stark effect (QCSE)
UR - http://journals.cambridge.org/action/displayJournal?jid=MRC
U2 - 10.1557/mrc.2012.8
DO - 10.1557/mrc.2012.8
M3 - Article
VL - 2
SP - 55
EP - 60
JO - MRS Communications
T2 - MRS Communications
JF - MRS Communications
IS - 2
ER -