Surface plasmon optical tweezer device

Abstract

The invention relates to the near field optical technical field, and provides a surface plasmon optical tweezer device comprising an exciting light unit, a surface plasmon excitation unit and a scan control and monitoring unit; the surface plasmon excitation unit comprises a glass slide plated with a metal film, a to-be-dynamically controlled and directionally rotating micro-nano composition solution is placed on the glass slide; the exciting light unit is used for forming a vortex light beam, and emitting the vortex light beam into the surface plasmon excitation unit; the surface plasmon excitation unit is used for using the vortex light beam to respectively excite a convergence surface plasmon vortex light field on the metal film and the hydrosphere surface of the micro-nano compositionsolution; the surface plasmon vortex light field can dynamically control and directionally rotate the micro-nano compositions in the micro-nano composition solution; the scan control and monitoring unit is used for monitoring the dynamical control and directional rotation of the micro-nano compositions in real time. The micro-nano compositions can be stably captured and dynamically controlled in fixed points in the surface plasmon vortex light fields.

Description

technical field [0001] The invention belongs to the technical field of near-field optics, in particular to a surface plasmon optical tweezers device. Background technique [0002] Optical vortex OV (Optical Vortices) is a special beam with helical phase and orbital angular momentum (OAM), which has become a research hotspot in recent years due to its unique properties. The optical vortex optical tweezers technology has been widely used in the field of optical manipulation of microscopic substances, and its function can be similar to an optical wrench. In recent years, the plasmonic structure based on the micro-nano structure-metal film structure has very important research value and Practical significance. [0003] In traditional laser optical tweezers, micro-nano structures such as nanowires or nanorods are usually affected by two kinds of forces in the light field, that is, the gradient force generated by the uneven distribution of light intensity around the nanowires. T...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a surface plasmon optical tweezers device, which aims to solve the problem that in the prior art, metal micro-nano structures are subjected to uneven and difficult to control forces in laser optical tweezers, and it is difficult to achieve Problems of Stable Capture and Orientation Rotation Manipulation in 3D Space

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