Journal ArticleDOI
Optical dephasing of homogeneously broadened two-dimensional exciton transitions in GaAs quantum wells.
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In this article, the authors reported optical dephasing of two-dimensional excitons in single quantum wells by means of time-resolved degenerate-four-wave mixing and transmission experiments in the temperature range below 80 K.Abstract:
We report optical dephasing of two-dimensional excitons in $\mathrm{GaAs}\ensuremath{-}{\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ single quantum wells by means of time-resolved degenerate-four-wave mixing and transmission experiments in the temperature range below 80 K. The observed absorption linewidths correspond directly to the excitonic phase coherence times, confirming the homogeneous broadening of the excitonic absorption. A linear temperature dependence of the homogeneous linewidth indicates acoustic-phonon scattering as the broadening mechanism.read more
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Journal ArticleDOI
Intrinsic homogeneous linewidth and broadening mechanisms of excitons in monolayer transition metal dichalcogenides
Galan Moody,Chandriker Kavir Dass,Kai Hao,Chang-Hsiao Chen,Lain-Jong Li,Akshay Singh,Kha Tran,Genevieve Clark,Xiaodong Xu,Gunnar Berghäuser,Ermin Malic,Andreas Knorr,Xiaoqin Li +12 more
TL;DR: The key insights reported here—strong many-body effects and intrinsically rapid radiative recombination—are expected to be ubiquitous in atomically thin semiconductors.
Journal ArticleDOI
Radiative lifetime of free excitons in quantum wells
TL;DR: In this article, the intrinsic radiative lifetime of excitons in quantum wells arising from the lack of translational invariance along the growth direction was calculated for 100 A wide GaAs-Ga1−x Al x As quantum wells.
Journal ArticleDOI
Observation of Excitonic Fine Structure in a 2D Transition-Metal Dichalcogenide Semiconductor
Jingzhi Shang,Xiaonan Shen,Chunxiao Cong,Namphung Peimyoo,Bingchen Cao,Mustafa Eginligil,Ting Yu +6 more
TL;DR: The finding of electrically induced robust emission opens up a possibility to boost the luminous efficiency of emerging 1L TMD light emitting diodes and indicates the strong Coulomb interactions in such a 2D material.
Journal ArticleDOI
Theory of exciton dephasing in semiconductor quantum dots
TL;DR: In lower-dimensional semiconductors, electronic confinement leads to qualitative changes in population relaxation, including spontaneous emission and exciton-phonon scattering, as shown in extensive recent studies as mentioned in this paper.
Journal ArticleDOI
Coherent nonlinear pulse propagation on a free-exciton resonance in a semiconductor
TL;DR: In this paper, the coherent nonlinear pulse propagation was analyzed using the semiconductor Maxwell-Bloch equations, which accomplished the transition from linear to nonlinear optics by taking into account many-body interactions consisting of mean-field and correlation effects.
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