Polarization tuned light-matter coupling in exciton-polariton manifold
ORAL
Abstract
Group VII TMDs like ReS2 show strongly anisotropic electronic and optical properties from bulk to monolayer limit without any drastic change, making it ideal for multilayer photonic devices. Here, we demonstrate highly tunable strong light-matter coupling in ReS2, with Rabi splitting of up to 68 meV, utilizing the interaction of anisotropic polarized excitons and the photonic mode supported in the ReS2 layer placed on a DBR structure. The coupling strength of such highly anisotropic exciton-polaritons can be tuned by rotation of incident beam polarization. It also can be used to switch between two independent three-body coupled oscillators in this system. In addition, layer thickness and temperature variation provide a way to manipulate the coupling strength and polariton detuning. Our result paves the way to engineer devices for application in polarization-controlled photonics.
*S. D. acknowledges Science and Engineering Research Board (SB/S2/RJN-110/2016) Ramanujan Fellowship, SERB (CRG/2018/002845), Indian Institute of Technology Kharagpur (IIT/SRIC/ISIRD/2017-2018), and Ministry of Human Resource Development (IIT/SRIC/PHY/NTS/2017-18/75) for the funding and support for this work. A. R. C. acknowledges SERB, ECR/2017/000498 for funding for this work. D. C. acknowledges Council of Scientific and Industrial Research, JRF (09/081(1352)/2019-EMR-I) for the financial assistance. K. G. acknowledges Department of Science and Technology INSPIRE fellowship (IF180046) for the financial support.
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Publication:"Interfacial anisotropic exciton-polariton manifolds in ReS2", Devarshi Chakrabarty*, Avijit Dhara*, Kritika Ghosh, Aswini K Pattanayak, Shreyashi Mukherjee, Ayan Roy Chaudhuri, Sajal Dhara arXiv preprint arXiv:2107.09920 (Accepted in Optica) *equal contribution
