Off-axis optical levitation and transverse spinning of metallic microparticles

2021 ◽  
Author(s):  
Yansheng Liang ◽  
Shaohui Yan ◽  
ZhaoJun Wang ◽  
Baoli Yao ◽  
Ming Lei
Keyword(s):  
Optical Levitation

Raman-Microsampling Technique Applying Optical Levitation by Radiation Pressure

1984 ◽  
Vol 38 (1) ◽  
pp. 78-83 ◽  
Author(s):  
R. Thurn ◽  
W. Kiefer
Keyword(s):  
Radiation Pressure ◽  
Optical Potential ◽  
Solid Particles ◽  
Spherical Particles ◽  
Exciting Light ◽  
Potential Wells ◽  
Ion Laser ◽  
Optical Levitation ◽  
Argon Ion ◽  
Microprobe Technique

We report on a new Raman microprobe technique where micron-sized solid particles are trapped in stable optical potential wells using only the force of radiation pressure from a continuous gas laser. We demonstrate this technique with Raman spectra from spherical and non-spherical particles of sizes ranging between 10–30 μm. The particles are stably supported by a vertical directed focused TEM00-mode cw argon ion laser of ∼500 mW. The latter simultaneously serves as the exciting light source. Several suggestions for improvements of this technique are made.

Optical brake induced by laser shock waves

2021 ◽  
pp. 2050010
Author(s):  
Qiao Kang ◽  
Dongyi Shen ◽  
Jie Sun ◽  
Xin Luo ◽  
Wei Liu ◽  
...  
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Optical Method ◽  
Close Contact ◽  
Surface Friction ◽  
Laser Shock ◽  
Free Standing ◽  
Friction Forces ◽  
Optical Levitation ◽  
Contact Surfaces

We demonstrate an optical method to modify friction forces between two close-contact surfaces through laser-induced shock waves, which can strongly enhance surface friction forces in a sandwiched confinement with/without lubricant, due to the increase of pressure arising from excited shock waves. Such enhanced friction can even lead to a rotating rotor’s braking effect. Meanwhile, this shock wave-modified friction force is found to decrease under a free-standing configuration. This technique of optically controllable friction may pave the way for applications in optical levitation, transportation, and microfluidics.

scholarly journals Observation of nonlinear dynamics in an optical levitation system

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Jinyong Ma ◽  
Jiayi Qin ◽  
Geoff T. Campbell ◽  
Giovanni Guccione ◽  
Ruvi Lecamwasam ◽  
...  
Keyword(s):  
Optical Cavity ◽  
Mechanical Quality Factor ◽  
Optical Field ◽  
Free Standing ◽  
Levitation System ◽  
Active Feedback ◽  
Sideband Generation ◽  
Optical Levitation ◽  
Mechanical Oscillators ◽  
Lift Off

Abstract Optical levitation of mechanical oscillators has been suggested as a promising way to decouple the environmental noise and increase the mechanical quality factor. Here, we investigate the dynamics of a free-standing mirror acting as the top reflector of a vertical optical cavity, designed as a testbed for a tripod cavity optical levitation setup. To reach the regime of levitation for a milligram-scale mirror, the optical intensity of the intracavity optical field approaches 3 MW cm−2. We identify three distinct optomechanical effects: excitation of acoustic vibrations, expansion due to photothermal absorption, and partial lift-off of the mirror due to radiation pressure force. These effects are intercoupled via the intracavity optical field and induce complex system dynamics inclusive of high-order sideband generation, optical bistability, parametric amplification, and the optical spring effect. We modify the response of the mirror with active feedback control to improve the overall stability of the system.

Optical levitation and transport of microdroplets: Proof of concept

2008 ◽  
Vol 20 (10) ◽  
pp. 101703 ◽  
Author(s):  
Peter T. Nagy ◽  
G. Paul Neitzel
Keyword(s):  
Proof Of Concept ◽  
Optical Levitation

Optical levitation and partial-wave resonances

1978 ◽  
Vol 18 (5) ◽  
pp. 2229-2233 ◽  
Author(s):  
Petr Chýlek ◽  
J. T. Kiehl ◽  
M. K. W. Ko
Keyword(s):  
Partial Wave ◽  
Optical Levitation
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