Photothermal self-oscillation and laser cooling of graphene optomechanical systems.
By virtue of their low mass and stiffness, atomically thin mechanical resonators are attractive candidates for use in optomechanics. Here, we demonstrate photothermal back-action in a graphene mechanical resonator comprising one end of a Fabry-Perot cavity. As a demonstration of the utility of this effect, we show that a continuous wave laser can be used to cool a graphene vibrational mode or to power a graphene-based tunable frequency oscillator. Owing to graphene's high thermal conductivity and optical absorption, photothermal optomechanics is efficient in graphene and could ultimately enable laser cooling to the quantum ground state or applications such as photonic signal processing.
School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
Robert A
RA
Barton
Isaac R
IR
Storch
Vivekananda P
VP
Adiga
Reyu
R
Sakakibara
Benjamin R
BR
Cipriany
B
B
Ilic
Si Ping
SP
Wang
Peijie
P
Ong
Paul L
PL
McEuen
Jeevak M
JM
Parpia
Harold G
HG
Craighead
D003080:Cold Temperature; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007834:Lasers; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D055096:Optical Devices; D010316:Particle Size; D010777:Photochemistry / Q000379:methods; D013685:Telecommunications / Q000295:instrumentation*; D013696:Temperature
D006108:Graphite