Electric field tuning of strain-induced quantum emitters in WSe2
Abstract
Generation of spectrally tunable single photon sources at predetermined spatial locations is a key enabling step toward scalable optical quantum technologies. In this regard, semiconducting two dimensional materials, like tungsten diselenide (WSe2), have recently been shown to host optically active quantum emitters that can be strain induced using nanostructured substrates and also be spectrally tuned with electric and magnetic fields. In this work, we employ a van der Waals heterostructure of WSe2, hexagonal boron nitride, and few layer graphene on a nanopillar array to yield electric field tunable single photon emission at locations with induced strain. The quantum emission lines, which have linewidths of hundreds of μeV, can be tuned by several times their linewidths. In contrast to previous reports of decrease in energy of randomly occurring quantum emitters in WSe2, we interestingly find an increase in energies (blueshift) in these strain-induced emitters.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 01, 2020
- Source ID
- 10.1063/5.0010395
Entities
People
- Arunabh Mukherjee
- Chitraleema Chakraborty
- Liangyu Qiu
- Nick Vamivakas
Organizations
- Air Force Office of Scientific Research
- Harvard University
- National Science Foundation
- University of Rochester