Optical two-dimensional coherent spectroscopy of semiconductor nanostructures

Gaël Nardin; Travis M. Autry; Galan Moody; Rohan Singh; Hebin Li; Steven T. Cundiff

doi:10.1117/12.2062608

5 September 2014 Optical two-dimensional coherent spectroscopy of semiconductor nanostructures

Gaël Nardin, Travis M. Autry, Galan Moody, Rohan Singh, Hebin Li, Steven T. Cundiff

Proceedings Volume 9198, Ultrafast Nonlinear Imaging and Spectroscopy II; 91980Y (2014) https://doi.org/10.1117/12.2062608
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

Our recent work on optical two-dimensional coherent spectroscopy (2DCS) of semiconductor materials is reviewed. We present and compare two approaches that are appropriate for the study of semiconductor nanostructures. The first one is based on a non-collinear geometry, where the Four-Wave-Mixing (FWM) signal is detected in the form of a radiated optical field. This approach works for samples with translational symmetry, such as Quantum Wells (QWs), or large and dense ensembles of Quantum Dots (QDs). The second method is based on a collinear geometry, where the FWM is detected in the form of a photocurrent. This second approach enables 2DCS of samples where translational symmetry is broken, such as single QDs, nanowires, or nanotubes, and small ensembles thereof. For each method, we provide an example of experimental results obtained on semiconductor QWs. In particular, it is shown how 2DCS can reveal coherent excitonic coupling between adjacent QWs.

Citation Download Citation

Gaël Nardin, Travis M. Autry, Galan Moody, Rohan Singh, Hebin Li, and Steven T. Cundiff "Optical two-dimensional coherent spectroscopy of semiconductor nanostructures", Proc. SPIE 9198, Ultrafast Nonlinear Imaging and Spectroscopy II, 91980Y (5 September 2014); https://doi.org/10.1117/12.2062608

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