Nonlinear optical trapping effect with reverse saturable absorption

被引：16

作者：

Zhu, Zheng ^{[1
,2
,3
,4
]}

Zhang, Yuquan ^{[1
,2
]}

Zhang, Shuoshuo ^{[1
,2
]}

Adam, Aurele J. L. ^{[4
]}

Min, Changjun ^{[1
,2
]}

Urbach, Hendrik Paul ^{[4
]}

Yuan, Xiaocong ^{[1
,2
,3
]}

机构：

[1] Shenzhen Univ, Inst Microscale Optoelect, Shenzhen, Peoples R China

[2] Nanophoton Res Ctr, State Key Lab Radio Frequency Heterogeneous Integr, Shenzhen, Peoples R China

[3] Zhejiang Lab, Res Inst Intelligent Sensing, Res Ctr Humanoid Sensing, Hangzhou, Peoples R China

[4] Delft Univ Technol, Opt Res Grp, Delft, Netherlands

来源：

ADVANCED PHOTONICS | 2023年 / 5卷 / 04期

基金：

中国国家自然科学基金;

关键词：

nonlinear optical tweezers; optical force; reverse saturable absorption; FIELD ENHANCEMENT; PARTICLES; AU; MANIPULATION; REGION;

D O I：

10.1117/1.AP.5.4.046006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Nonlinear responses of nanoparticles induce enlightening phenomena in optical tweezers. With the gradual increase in optical intensity, effects from saturable absorption (SA) and reverse SA (RSA) arise in sequence and thereby modulate the nonlinear properties of materials. In current nonlinear optical traps, however, the underlying physical mechanism is mainly confined within the SA regime because threshold values required to excite the RSA regime are extremely high. Herein, we demonstrate, both in theory and experiment, nonlinear optical tweezing within the RSA regime, proving that a fascinating composite trapping state is achievable at ultrahigh intensities through an optical force reversal induced through nonlinear absorption. Integrated results help in perfecting the nonlinear optical trapping system, thereby providing beneficial guidance for wider applications of nonlinear optics.

引用

页数：8