Optical trapping of nanoparticles on a silicon subwavelength grating and their detection by an ellipsometric technique. Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: Taki, Naoya; Mizutani, Yasuhiro; Iwata, Tetsuo; Kojima, Takao; Yamamoto, Hiroki; Kozawa, Takahiro
• Is Part Of: International journal of optomechatronics. Volume 10:Issue 1(2016)
• Page Start: 24
• Page End: 31
• Publication Date: 2016-01-02
• Subjects: Ellipsometry -- finite-difference time-domain method -- nanocomposite material -- nanoparticle -- optical trapping -- periodically localized light -- subwavelength grating; Optical engineering -- Periodicals; Mechanical engineering -- Periodicals; Electrical engineering -- Periodicals; Photonics -- Periodicals; Mechatronics -- Periodicals; 621.36
• DOI: 10.1080/15599612.2015.1124475
• Languages: English
• ISSNs: 1559-9612

Abstract

ABSTRACT: A method and setup are proposed for trapping and detecting nanoparticles dispersed in a nanocomposite solution using periodically localized light generated by a subwavelength transmission grating. By numerical simulations, it is shown that there is an optimum duty ratio of the grating to produce the periodically localized light. Experimental results are presented for Au/γ-Fe2 O3 composite nanoparticles having a diameter of 21.0 nm trapped on a silicon subwavelength rectangular grating and detected ellipsometrically. The technique should prove useful for evaluating optical and mechanical properties of nanocomposite materials.