Ultrafast fluorescent decay induced by metal-mediated dipole–dipole interaction in two-dimensional molecular aggregates
Abstract
Quantitative understanding of the ultrafast energy transfer between fluorescent nanoemitters and the environment is essential in nanophotonics and optoelectronics and beneficial to many industrial applications. For nanoemitters like single or colloidal dye molecules or quantum dots, their fluorescence decay near a metallic substrate can be described by a noninteracting single-dipole picture. In this work, we find a dominant fluorescent decay channel in a 2D molecular aggregate as a result of the strong and coherent dipole–dipole interaction mediated by a metallic substrate. This unique mechanism leads to an ultrafast fluorescent decay and 10-times greater energy dissipation rate than expected. Our finding opens up a unique way to manipulate energy transfer and to develop light-energy devices on the molecular level.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 05, 2017
- Source ID
- 10.1073/pnas.1703000114
Entities
People
- Dafei Jin
- Jun Xiao
- Nicholas X. Fang
- Qing Hu
- Sang Hoon Nam
- Xiang Zhang
- Xiaoze Liu
- Yongmin Liu
Organizations
- Air Force Office of Scientific Research
- Division of Civil, Mechanical & Manufacturing Innovation
- King Abdulaziz University
- Lawrence Berkeley National Laboratory
- Massachusetts Institute of Technology
- National Science Foundation
- Northeastern University