Fast size estimation of single-levitated nanoparticles in a vacuum optomechanical system

• DOI: 10.1364/ol.436041
• Publication Date: 2021-08-20T15:02:01Z
• Authors: Cui-Hong Li; Jiang Jing; Lei-Ming Zhou; Zhen-Hai Fu; Xiao-Wen Gao; Nan Li; Xing-Fan Chen; Hui-Zhu Hu
• Keywords: 02 engineering and technology; 0210 nano-technology

Optical trapping of single nanoparticles in vacuum has various applications both precise measurements and fundamental physics. However, to date, the number size randomly loaded an optical trap is difficult determine unless vacuum. In this Letter, efficient method for nanoparticle estimation tweezer system before evacuation air was proposed demonstrated experimentally, using scattering light from levitated particles. The particle radii deduced power our proposal kinetic theory particles gas match well (with differences less than <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mn>10</mml:mn> <mml:mi mathvariant="normal">%</mml:mi> </mml:math> ). For sample with ranging within 50–100 nm, we also provide a preselection rule based on method, where over half trapped are verified as Such analysis applicable diamond particles, gold other plasmonic can be applied discovering novel effects.