The simulation research of multi-core optical fiber near-field optical tweezers

2011 ◽  
Author(s):  
Guohua Hou ◽  
Zhihai Liu
Keyword(s):  
Optical Fiber ◽  
Optical Tweezers ◽  
Near Field ◽  
Simulation Research

scholarly journals From Far-Field to Near-Field Micro- and Nanoparticle Optical Trapping

2020 ◽  
Vol 10 (4) ◽  
pp. 1375 ◽  
Author(s):  
Theodoros D. Bouloumis ◽  
Síle Nic Chormaic
Keyword(s):  
Optical Tweezers ◽  
Near Field ◽  
Metallic Nanostructures ◽  
Diffraction Limit ◽  
Submicron Particles ◽  
Great Success ◽  
Laser Illumination ◽  
Minimum Particle Size ◽  
Standard Tool ◽  
Established Technique

Optical tweezers are a very well-established technique that have developed into a standard tool for trapping and manipulating micron and submicron particles with great success in the last decades. Although the nature of light enforces restrictions on the minimum particle size that can be efficiently trapped due to Abbe’s diffraction limit, scientists have managed to overcome this problem by engineering new devices that exploit near-field effects. Nowadays, metallic nanostructures can be fabricated which, under laser illumination, produce a secondary plasmonic field that does not suffer from the diffraction limit. This advance offers a great improvement in nanoparticle trapping, as it relaxes the trapping requirements compared to conventional optical tweezers although problems may arise due to thermal heating of the metallic nanostructures. This could hinder efficient trapping and damage the trapped object. In this work, we review the fundamentals of conventional optical tweezers, the so-called plasmonic tweezers, and related phenomena. Starting from the conception of the idea by Arthur Ashkin until recent improvements and applications, we present the principles of these techniques along with their limitations. Emphasis in this review is on the successive improvements of the techniques and the innovative aspects that have been devised to overcome some of the main challenges.

scholarly journals Near‐Field Optical Tweezers for Chemistry and Biology

2020 ◽  
Vol 217 (1) ◽  
pp. 2070010 ◽  
Author(s):  
Sheng Hu ◽  
Zi-wei Liao ◽  
Lu Cai ◽  
Xiao-xiao Jiang
Keyword(s):  
Optical Tweezers ◽  
Near Field

Near‐Field Optical Tweezers for Chemistry and Biology

2019 ◽  
Vol 217 (1) ◽  
pp. 1900604 ◽  
Author(s):  
Sheng Hu ◽  
Zi-wei Liao ◽  
Lu Cai ◽  
Xiao-xiao Jiang
Keyword(s):  
Optical Tweezers ◽  
Near Field

scholarly journals Optical Fibre Micro/Nano Tips as Fluorescence-Based Sensors and Interrogation Probes

Optics ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 213-242 ◽  
Author(s):  
Simone Berneschi ◽  
Andrea Barucci ◽  
Francesco Baldini ◽  
Franco Cosi ◽  
Franco Quercioli ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Optical Fibre ◽  
Near Field ◽  
Optical Devices ◽  
Biochemical Sensors ◽  
Whispering Gallery ◽  
Biochemical Sensing ◽  
Nano Structures ◽  
Microscope Imaging ◽  
Physical And Chemical

Optical fibre micro/nano tips (OFTs), defined here as tapered fibres with a waist diameter ranging from a few microns to tens of nanometres and different tip angles (i.e., from tens of degrees to fractions of degrees), represent extremely versatile tools that have attracted growing interest during these last decades in many areas of photonics. The field of applications can range from physical and chemical/biochemical sensing—also at the intracellular levels—to the development of near-field probes for microscope imaging (i.e., scanning near-field optical microscopy (SNOM)) and optical interrogation systems, up to optical devices for trapping and manipulating microparticles (i.e., optical tweezers). All these applications rely on the ability to fabricate OFTs, tailoring some of their features according to the requirements determined by the specific application. In this review, starting from a short overview of the main fabrication methods used for the realisation of these optical micro/nano structures, the focus will be concentrated on some of their intriguing applications such as the development of label-based chemical/biochemical sensors and the implementation of SNOM probes for interrogating optical devices, including whispering gallery mode microcavities.

Two-core single mode optical fiber as optical tweezers

2007 ◽  
Author(s):  
Zhongfu Wu ◽  
Zhihai Liu ◽  
Jun Yang ◽  
Libo Yuan
Keyword(s):  
Optical Fiber ◽  
Optical Tweezers ◽  
Single Mode ◽  
Single Mode Optical Fiber
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