High Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge
Abstract
The conversion of light in sound plays a crucial role in spectroscopy, applied physics, and technology. In this paper, light sound conversion in 3D graphene sponge through a photothermoacoustic mechanism is reported. It is shown that the unique combination of mechanical, optical, and thermodynamic properties of graphene assembled in a 3D sponge structure allows an unprecedented high efficiency conversion independent of light wavelength from infrared to ultraviolet. As a first application of this effect, a photothermal based graphene sponge loudspeaker is demonstrated, providing a full digital operation for frequencies from acoustic to ultrasound. The present results suggest a new pathway for light generation and control of sound and ultrasound signals potentially usable in a variety of new technological applications from high fidelity loudspeaker and radiation detectors to medical devices.
Keywords
Cite
@article{arxiv.1806.03930,
title = {High Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge},
author = {Flavio Giorgianni and Carlo Vicario and Mostafa Shalaby and Lorenzo Donato Tenuzzo and Augusto Marcelli and Tengfei Zhang and Kai Zhao and Yongsheng Chen and Christoph Hauri and Stefano Lupi},
journal= {arXiv preprint arXiv:1806.03930},
year = {2018}
}
Comments
8 pages,4 figures