Complex amplitude modulation in femtosecond vortex optical trapping systems

【摘要】 The phase structure of vortex beams makes them extremely sensitive to wavefront aberrations—even slight variations in amplitude or phase can disrupt their rotational symmetry, causing unstable particle trapping. Aberration correction is a commonly used approach to compensate for phase distortions. However, it is not effective in addressing the impact of amplitude distortions on vortex light fields. In this paper, we propose a complex amplitude modulation scheme for femtosecond optical vortex trapping systems. By employing amplitude and phase spatial light modulators to implement closed-loop modulation, the vortex trap was corrected, and trapping experiments were conducted.更多还原

【Abstract】 The phase structure of vortex beams makes them extremely sensitive to wavefront aberrations—even slight variations in amplitude or phase can disrupt their rotational symmetry, causing unstable particle trapping. Aberration correction is a commonly used approach to compensate for phase distortions. However, it is not effective in addressing the impact of amplitude distortions on vortex light fields. In this paper, we propose a complex amplitude modulation scheme for femtosecond optical vortex trapping systems. By employing amplitude and phase spatial light modulators to implement closed-loop modulation, the vortex trap was corrected, and trapping experiments were conducted.更多还原