Journal article

Near-Perfect Absorption of Light by Coherent Plasmon-Exciton States

Daniel E Gomez, Xu Shi, Tomoya Oshikiri, Ann Roberts, Hiroaki Misawa

NANO LETTERS | AMER CHEMICAL SOC | Published : 2021

Abstract

We experimentally demonstrate and theoretically study the formation of coherent plasmon-exciton states which exhibit absorption of >90% of the incident light (at resonance) and cancellation of absorption. These coherent states result from the interaction between a material supporting an electronic excitation and a plasmonic structure capable of (near) perfect absorption of light. We illustrate the potential implications of these coherent states by measuring the charge separation attainable after photoexcitation. Our study opens the prospect for realizing devices that exploit coherent effects in applications.

Grants

Awarded by JSPS KAKENHI


Awarded by ARC


Funding Acknowledgements

We acknowledge the Hokkaido University Overseas Guest Instructor Program, the financial support from JSPS KAKENHI (Grant Nos. JP18H05205, JP18K05053, and JP20K15113), the Nanotechnology Platform (Hokkaido University), the Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials (Five-Star Alliance) of MEXT, the ARC for support through a Future Fellowship (FT140100514) and a Discovery Project (DP160100983).