Numerical analysis of an optical nanoscale particles trapping device based on a slotted nanobeam cavity

Zhang, Senlin (author)

Yong, Zhengdong (author)

Shi, Yaocheng (author)

He, Sailing (author): KTH,Elektroteknisk teori och konstruktion,Zhejiang University, China

(creator_code:org_t)

2016-10-27
2016
English.
In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 6

Related links:: https://www.nature.c...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

A slotted nanobeam cavity (SNC) is utilized to trap a polystyrene (PS) particle with a radius of only 2 nm. The carefully designed SNC shows an ultrahigh Q factor of 4.5 x 10(7) while maintaining a small mode volume of 0.067(lambda/n(water))(3). Strongly enhanced optical trapping force is numerically demonstrated when the 2 nm PS particle is introduced into the central, slotted part of the SNC. In the vertical direction, the numerical calculation results show that a trapping stiffness of 0.4 pN/(nm.mW) around the equilibrium position and a trapping potential barrier of similar to 2000 k(B)T/mW can be reached. To our best knowledge, the trapping capability (trapping stiffness and trapping potential barrier) of the proposed structure significantly outperforms the theoretical results of those in previously reported work. In addition, the SNC system does not suffer from the metal induced heat issue that restricts the performance of state-of-the-art optical trapping systems involving plasmonic enhancement. Based on the proposed cavity, applications such as lab-on-a-chip platforms for nanoscale particle trapping and analysis can be expected in future.

By the author/editor: Zhang, Senlin; Yong, Zhengdong; Shi, Yaocheng; He, Sailing

About the subject

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.