Fifth-order nonlinear optical response of excitonic states in an InAs quantum dot ensemble measured with two-dimensional spectroscopy

2012/10/30 by G. Moody, Galan Moody, Rohan Singh +11 · 65 citations
Physics and Astronomy · #Atomic physics #Biexciton #Coherent spectroscopy #Condensed matter physics #Dephasing #Excitation #Exciton #Molecular physics #Motional narrowing #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum optics and atomic interactions #Semiconductor Quantum Structures and Devices #Spectral line #Spectroscopy #Trion #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.87.045313

published in Physical Review B 87(4) (American Physical Society)

arxiv created 2012/10/30 · openalex publication_date 2013/01/25 · arxiv updated 2014/09/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Exciton, trion, and biexciton dephasing rates are measured for an ensemble of InAs quantum dots using two-dimensional Fourier-transform spectroscopy. The two-dimensional spectra reveal that the dephasing rate of each excitonic state is similar for all dots in the ensemble and the rates are independent of excitation density. An additional spectral feature (too weak to be observed in the time-integrated four-wave mixing signal) appears at high excitation density and is attributed to the \ensuremathχ⁽⁵⁾ biexcitonic nonlinear response.

Citations

• Coulomb interactions in single charged self-assembled quantum dots: Radiative lifetime and recombination energy

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