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Proceedings Paper

Plasmonic optical nanotweezers
Author(s): Rehab Kotb; Mahmoud El Maklizi; Yehea Ismail; Mohamed A. Swillam
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Paper Abstract

Plasmonic grating structures can be used in many applications such as nanolithography and optical trapping. In this paper, we used plasmonic grating as optical tweezers to trap and manipulate dielectric nano-particles. Different plasmonic grating structures with single, double, and triple slits have been investigated and analyzed. The three configurations are optimized and compared to find the best candidate to trap and manipulate nanoparticles. The three optimized structures results in capability to super focusing and beaming the light effectively beyond the diffraction limit. A high transverse gradient optical force is obtained using the triple slit configuration that managed to significantly enhance the field and its gradient. Therefore, it has been chosen as an efficient optical tweezers. This structure managed to trap sub10nm particles efficiently. The resultant 50KT potential well traps the nano particles stably. The proposed structure is used also to manipulate the nano-particles by simply changing the angle of the incident light. We managed to control the movement of nano particle over an area of (5μm x 5μm) precisely. The proposed structure has the advantage of trapping and manipulating the particles outside the structure (not inside the structure such as the most proposed optical tweezers). As a result, it can be used in many applications such as drug delivery and biomedical analysis.

Paper Details

Date Published: 20 February 2017
PDF: 8 pages
Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101121C (20 February 2017); doi: 10.1117/12.2253656
Show Author Affiliations
Rehab Kotb, Mentor Graphics Egypt (Egypt)
The American Univ. in Cairo (Egypt)
Mahmoud El Maklizi, The American Univ. in Cairo (Egypt)
Yehea Ismail, The American Univ. in Cairo (Egypt)
Mohamed A. Swillam, The American Univ. in Cairo (Egypt)


Published in SPIE Proceedings Vol. 10112:
Photonic and Phononic Properties of Engineered Nanostructures VII
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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