ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
NPL-v2.pdf (4.47 MB)

Molecular Polaritons Generated from Strong Coupling between CdSe Nanoplatelets and a Dielectric Optical Cavity

preprint
revised on 09.04.2021, 18:35 and posted on 12.04.2021, 06:28 by Liangyu Qiu, Arkajit Mandal, Ovishek Morshed, Mahilet T. Meidenbauer, William Girten, Pengfei Huo, A. Nickolas Vamivakas, Todd D. Krauss
We demonstrate the formation of CdSe nanoplatelet (NPL) exciton-polaritons in a distributed bragg reflector (DBR) cavity. The molecule-cavity hybrid system is in the strong coupling regime with an 83 meV Rabi splitting, characterized from angle-resolved reflectance and photoluminescence measurements. Mixed quantum-classical dynamics simulations are used to investigate the polariton photophysics of the hybrid system by treating the electronic and photonic degrees of freedom (DOF) quantum mechanically, and the nuclear phononic DOF classically. Our numerical simulations of the angle-resolved photoluminescence (PL) agree extremely well with the experimental data, providing a fundamental explanation of the asymmetric intensity distribution of the upper and lower polariton branches. Our results also provide mechanistic insights into the importance of phonon-assisted non-adiabatic transitions among polariton states which are reflected in the various features of the PL spectra. This work proves the feasibility of coupling nanoplatelet electronic states with the photon states of a dielectric cavity to form a hybrid system and provides a new platform for investigating cavity-mediated physical and chemical processes.

Funding

National Science Foundation

Research Corporation for Science Advancement

History

Email Address of Submitting Author

pengfei.huo@rochester.edu

Institution

University of Rochester

Country

United States

ORCID For Submitting Author

0000-0002-8639-9299

Declaration of Conflict of Interest

NA

Exports