Incoherent optical tweezer on a nanostructured rare metal

Yasuyuki Tsuboi; Sayaka Hashimoto; Ryota Takao; Ken-Ichi Yuyama; Tatsuya Shoji

doi:10.1117/12.2616169

27 October 2021 Incoherent optical tweezer on a nanostructured rare metal

Yasuyuki Tsuboi, Sayaka Hashimoto, Ryota Takao, Ken-Ichi Yuyama, Tatsuya Shoji

Proceedings Volume 11926, Optical Manipulation and Structured Materials Conference 2021; 1192613 (2021) https://doi.org/10.1117/12.2616169
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

Optical tweezers enable the manipulation of micro-and nano dielectric particles through entrapment using a tightly focused laser. Generally, optical trapping of sub-micron size particles requires high intensity light in the order of MW/cm2. Here, we demonstrate a technique of stable optical trapping of submicron polymeric beads on nanostructured rare metal surfaces (RMS) without the use of lasers. Fluorescent polymer beads with diameter d = 20 – 500 nm were successfully trapped on the nanostructured RMS by low-intensity focused illumination of incoherent light at =370 m from a Hg lamp. Light intensity was 5.5 W/cm2, corresponding to a reduced light intensity of 6 orders of magnitude. Upon switching off illumination, trapped particles were released from the illuminated area, indicating that the trapping was optically driven and reversible. The nanostructures were demonstrated to play a key role.

Citation Download Citation

Yasuyuki Tsuboi, Sayaka Hashimoto, Ryota Takao, Ken-Ichi Yuyama, and Tatsuya Shoji "Incoherent optical tweezer on a nanostructured rare metal", Proc. SPIE 11926, Optical Manipulation and Structured Materials Conference 2021, 1192613 (27 October 2021); https://doi.org/10.1117/12.2616169

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