Exciton gas transport through nano-constrictions


Two-dimensional indirect excitons can be created optically in heterostructures containing double quantum wells or atomically thin semiconductors. We study theoretically transmission of such bosonic quasiparticles through nanoconstrictions. We show that quantum transport phenomena, e.g., conductance quantization, single-slit diffraction, two-slit interference, and the Talbot effect are experimentally realizable in systems of indirect excitons. We discuss similarities and differences between these phenomena and their counterparts in electronic devices.

Chao Xu, J. R. Leonard, C. J. Dorow, L. V. Butov, M. M. Fogler, D. E. Nikonov, and I. A. Young; Split-gate device for indirect excitons, arXiv:1905.01619 (2019), Nano Lett. 19, 5373 (2019).

Split-gate device for indirect excitons


We present a concept and experimental proof of principle for split-gate devices for indirect excitons (IXs). The split-gate forms a narrow channel, a point contact, for IX current. Control of IX flow through the split-gate with both gate voltage and excitation power is demonstrated.

C.J. Dorow, J.R. Leonard, M.M. Fogler, L.V. Butov, K.W. West, L.N. Pfeiffer. Split-gate device for indirect excitons, arXiv:1801.01553 (2018), Appl. Phys. Lett. 112, 183501 (2018).