Open AccessQuantitative measurement and mechanism analysis of the high-efficiency laser propulsion of a graphene sponge
Author(s) -
Lei Wang,
Wing Yim Tam,
Qi Zhao,
Xia Wang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.403875
Subject(s) - propulsion , laser , graphene , knudsen number , materials science , work (physics) , propellant , aerospace engineering , spacecraft propulsion , mechanism (biology) , optics , nanotechnology , physics , mechanics , thermodynamics , engineering , quantum mechanics
Laser propulsion of a graphene sponge shows tremendous potential in propellant-free flight, photoresponsive actuators and micro opto-electro mechanical systems. However, the mechanism is still in dispute and the propulsion force hasn't been accurately measured, seriously hindering its development. This work develops a quantitative method to measure the propulsion force. It is found that the characteristics of the force agree qualitatively with the Knudsen force due to laser-induced thermal nonequilibrium in rarefied gas, which might be another possible mechanism of laser propulsion of a graphene sponge. Also, this kind of laser propulsion is highly efficient, stable and sustainable.