Vibrational coupling in plasmonic molecules
Abstract
In this work, we provide evidence of vibrational coupling between the constituent atoms in a plasmonic molecule mediated by coherent substrate phonons. A simple coupled harmonic oscillator model provides fundamental insight into the optomechanical selection rules for the launching of vibrational modes. The coupling strength-dependent vibrational frequency shifts can be directly manipulated by precise tuning of the structure of the plasmonic molecule by using top-down lithography. This tunability paves the way for new strategies to design optomechanical devices based on metallic nanostructures.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 16, 2017
- Source ID
- 10.1073/pnas.1712418114
Entities
People
- Chongyue Yi
- Debadi Chakraborty
- Fangfang Wen
- John E. Sader
- Man-Nung Su
- Naomi J. Halas
- Peter Nordlander
- Pratiksha D Dongare
- Stephan Link
- Wei-Shun Chang
- Wen-Xiao Wang
Organizations
- Australian Research Council
- National Science Foundation
- Rice University
- Robert A. Welch Foundation
- United States Air Force
- United States Army
- University of Melbourne