# An Adaptive Soft Plasmonic Nanosheet Resonator

## TL;DR

This paper introduces a soft, adaptive plasmonic nanosheet resonator that can dynamically respond to light intensity and wavelength changes, mimicking biological systems and enabling tunable opto-mechanical applications.

## Contribution

It presents a novel organic-inorganic hybrid plasmonic nanosheet with reversible, tunable adaptive frequency responses driven by plasmonic heating effects.

## Key findings

- Responsive to incident light intensity and wavelength
- Reversible and tunable adaptive frequency responses
- Potential for next-generation bio-mimicking systems

## Abstract

Current micro nanomechanical system are usually based on rigid crystalline semiconductors that normally have high quality factors but lack adaptive responses to variable frequencies, a capability ubiquitous for communications in the biological world, such as bat and whale calls. Here, we demonstrate a soft mechanical resonator based on a freestanding organic-inorganic hybrid plasmonic superlattice nanosheet, which can respond adaptively to either incident light intensity or wavelength. This is achieved because of strong plasmonic coupling in closely-packed nanocrystals which can efficiently concentrate and convert photons into heat. The heat causes the polymer matrix to expand, leading to a change in the nanomechanical properties of the plasmonic nanosheet. Notably, the adaptive frequency responses are also reversible and the responsive ranges are fine-tunable by adjusting the constituent nanocrystal building blocks. We believe that our plasmonic nanosheets may open a new route to design next-generation intelligent bio-mimicking opto-mechanical resonance systems.

---
Source: https://tomesphere.com/paper/1902.05663