Optical Levitation of a Droplet under Linear Increase of Gravitational Acceleration

Details Optical Levitation of a Droplet under Linear Increase of Gravitational Acceleration Optical Levitation of a Droplet under Linear Increase of Gravitational Acceleration

2005-05-15

arxiv.org/abs/physics/0505104v1

Physics

Optics

Scientific paper

Optical levitation of a liquid droplet in gas phase was investigated under timedependent change of the gravitational acceleration with specific flight pattern of an airplane. Through multiple trials under linear increase of effective gravitational acceleration, we performed the experiment of ptical trapping of a droplet from 0.3g_0 to 0.9g_0, where g_0 = 9.8 m/s^2. During such change of the effective gravitational acceleration, the trapping position on a droplet with the radius of 14 μm was found to be lowered by ca. 100 μm. The essential feature of the change of the trapping position is reproduced by a theoretical calculation under the framework of ray optics. As far as we know, the present study is the first report on optical levitation under time-dependent gravitational change.

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