journal article·2022-11-03Open access

Single-exciton trapping in an electrostatically defined two-dimensional semiconductor quantum dot

Daniel N. Shanks, Fateme Mahdikhanysarvejahany, Michael R. Koehler, David G. Mandrus, Takashi Taniguchi, Kenji Watanabe, Brian J. LeRoy, John R. Schaibley

Physical Review B· Volume 106· Issue 20

Abstract

The ability to deterministically trap and control single interlayer excitons in 2D transition metal dichalcogenide heterostructures opens new opportunities to utilize their spin and valley degrees of freedom for quantum information applications. In this work, the authors fabricate a lithographically defined electrostatic exciton trap using a nanopatterned graphene gate. Photoluminescence measurements show discrete excitation power-dependent emission energies, corresponding to different number states of excitons occupying the trap, with the lowest-energy state corresponding a single-exciton population.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Semiconductor Quantum Structures and Devices · Quantum and electron transport phenomena · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, University of Arizona, 1118 East 4th Street, Tucson, Arizona 85721, USA

IAMM Diffraction Facility, Institute for Advanced Materials and Manufacturing, University of Tennessee, Knoxville, 2641 Osprey Vista Way, Knoxville, Tennessee 37920, USA

Department of Materials Science and Engineering, University of Tennessee, Knoxville, 1508 Middle Drive, Knoxville, Tennessee 37996, USA; Materials Science and Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, USA; and Department of Physics and Astronomy, University of Tennessee, Knoxville, 1408 Circle Drive, Knoxville, Tennessee 37996, USA

International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Funding

National Science Foundation · Army Research Office · Air Force Office of Scientific Research · Gordon and Betty Moore Foundation · Japan Society for the Promotion of Science

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