Raman spectrum scanning imaging system based on SPP thermoelectric optical tweezers

The invention provides a Raman spectrum scanning imaging system based on SPP thermoelectric optical tweezers. The system includes an excitation light unit, a surface plasmon excitation unit, and an SPP thermoelectric effect unit. Light beams generated by the excitation light unit are emitted to the surface plasmon excitation unit, the surface plasmon excitation unit excites a converging surface plasmon special light field under light beam irradiation, and the SPP thermoelectric effect unit carries out optical tweezers capture in the special light field. Stable capture on nano-level particles can be realized, and dynamic Raman spectrum scanning imaging in a range of a to-be-measured sample can be realized under SPP field enhancement. 本发明提供了一种基于SPP热电光镊的拉曼光谱扫描成像系统，包括激发光单元、表面等离激元激发单元及SPP热电效应单元；所述激发光单元产生的光束入射到所述表面等离激元激发单元，所述表面等离激元激发单元在光束照射下激发会聚的表面等离激元特殊光场，所述SPP热电效应单元在特殊光场中进行光镊捕获。能实现对纳米级别颗粒的稳定捕获，并在SPP的场增强下，实现对待测样品的范围内动态的拉曼光谱扫描成像。