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Micromachines
Special Issues
State-of-Art in Optical Tweezers
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State-of-Art in Optical Tweezers

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (1 April 2023) | Viewed by 2692

Special Issue Editors

Dr. Ruben Ramos-Garcia

E-Mail Website
Guest Editor
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Luis Enrique Erro #1. Sta Maria Tonantzintla, Puebla 72840, Mexico
Interests: optical physics; biophotonics; optical tweezers; laser-induced cavitation; structured beams; nanophotonics
Prof. Dr. Gabriel Spalding

E-Mail Website
Guest Editor
Laboratory for Mesoscopics & Quantum Microscopies, Illinois Wesleyan University, Bloomington, IL 61701, USA
Interests: digital optics; optical trapping; shaped beams; single-photon quantum; advanced lab instuction

Special Issue Information

Dear Colleagues,

Optical tweezers (OTs) enable trapping and manipulation without contact and apply minute forces on microscopic particles. Since the pioneering work of Arthur Ashkin, OTs have been developed at a dazzling speed.

To maintain the pace in recent advancements regarding OTs, the Special Issue, entitled “State of the Art in Optical Tweezers”, welcomes contributions regarding all aspects of optical trapping and manipulation. Theoretical and experimental studies are welcome, as well as articles concerning applications of OT in all the fields of science. This Special Issue will accept all forms of contributions, including research papers, communications and review articles.

Dr. Ruben Ramos-Garcia
Prof. Dr. Gabriel Spalding
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • optical tweezers
  • optical trapping
  • optical manipulations
  • optical force
  • radiation pressure
  • microparticles
  • living cells
  • nanoparticles
  • plasmon
  • single molecules
  • colloidal particles

Published Papers (2 papers)

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Research

9 pages, 1739 KiB  
Article
Holographic Optical Tweezers That Use an Improved Gerchberg–Saxton Algorithm
by Zhehai Zhou, Guoqing Hu, Shuang Zhao, Huiyu Li and Fan Zhang
Micromachines 2023, 14(5), 1014; https://doi.org/10.3390/mi14051014 - 09 May 2023
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Abstract
It is very important for holographic optical tweezers (OTs) to develop high-quality phase holograms through calculation by using some computer algorithms, and one of the most commonly used algorithms is the Gerchberg–Saxton (GS) algorithm. An improved GS algorithm is proposed in the paper [...] Read more.
It is very important for holographic optical tweezers (OTs) to develop high-quality phase holograms through calculation by using some computer algorithms, and one of the most commonly used algorithms is the Gerchberg–Saxton (GS) algorithm. An improved GS algorithm is proposed in the paper to further enhance the capacities of holographic OTs, which can improve the calculation efficiencies compared with the traditional GS algorithm. The basic principle of the improved GS algorithm is first introduced, and then theoretical and experimental results are presented. A holographic OT is built by using a spatial light modulator (SLM), and the desired phase that is calculated by the improved GS algorithm is loaded onto the SLM to obtain expected optical traps. For the same sum of squares due to error SSE and fitting coefficient η, the iterative number from using the improved GS algorithm is smaller than that from using traditional GS algorithm, and the iteration speed is faster about 27%. Multi-particle trapping is first achieved, and dynamic multiple-particle rotation is further demonstrated, in which multiple changing hologram images are obtained continuously through the improved GS algorithm. The manipulation speed is faster than that from using the traditional GS algorithm. The iterative speed can be further improved if the computer capacities are further optimized. Full article
(This article belongs to the Special Issue State-of-Art in Optical Tweezers)
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10 pages, 2258 KiB  
Article
Theoretical Analysis and Experimental Verification of the Influence of Polarization on Counter-Propagating Optical Tweezers
by Ming Chen, Wenqiang Li, Jianyu Yang, Mengzhu Hu, Shidong Xu, Xunmin Zhu, Nan Li and Huizhu Hu
Micromachines 2023, 14(4), 760; https://doi.org/10.3390/mi14040760 - 29 Mar 2023
Viewed by 1009
Abstract
Counter-propagating optical tweezers are experimental platforms for the frontier exploration of science and precision measurement. The polarization of the trapping beams significantly affects the trapping status. Using the T-matrix method, we numerically analyzed the optical force distribution and the resonant frequency of counter-propagating [...] Read more.
Counter-propagating optical tweezers are experimental platforms for the frontier exploration of science and precision measurement. The polarization of the trapping beams significantly affects the trapping status. Using the T-matrix method, we numerically analyzed the optical force distribution and the resonant frequency of counter-propagating optical tweezers in different polarizations. We also verified the theoretical result by comparing it with the experimentally observed resonant frequency. Our analysis shows that polarization has little influence on the radial axis motion, while the axial axis force distribution and the resonant frequency are sensitive to polarization change. Our work can be used in designing harmonic oscillators which can change their stiffness conveniently, and monitoring polarization in counter-propagating optical tweezers. Full article
(This article belongs to the Special Issue State-of-Art in Optical Tweezers)
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