Non-local coherent coupling between excitons in a disordered quantum well
2013; IOP Publishing; Volume: 15; Issue: 7 Linguagem: Inglês
10.1088/1367-2630/15/7/075026
ISSN1367-2630
AutoresYuri D. Glinka, Mikhail Erementchouk, Chandriker Kavir Dass, Michael N. Leuenberger, Allan S. Bracker, Xiaoqin Li,
Tópico(s)Semiconductor Quantum Structures and Devices
ResumoWe investigated coherent coupling among multiple exciton resonances formed in a single disordered quantum well using the powerful electronic two-dimensional Fourier transform spectroscopy. Our experiment revealed clear signatures of non-local coherent coupling between the heavy-hole and light-hole excitons residing in regions that differ in thickness by one atomic layer. The experimental observation is qualitatively explained by spatial overlap between exciton linear response functions calculated within a single defect model.
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