Simultaneous printing and deformation of microsystems via two-photon lithography and holographic optical tweezers

2019 ◽  
Vol 6 (2) ◽  
pp. 350-355 ◽  
Author(s):  
Samira Chizari ◽  
Lucas A. Shaw ◽  
Jonathan B. Hopkins
Keyword(s):  
Optical Tweezers ◽  
Strain Energy ◽  
Two Photon ◽  
Holographic Optical Tweezers

Microstructures with embedded strain energy are fabricated by an advanced approach that combines two-photon lithography with holographic optical tweezers.

scholarly journals Micro-Dumbbells—A Versatile Tool for Optical Tweezers

2018 ◽  
Author(s):  
Weronika Lamperska ◽  
Sławomir Drobczyński ◽  
Michał Nawrot ◽  
Piotr Wasylczyk ◽  
Jan Masajada
Keyword(s):  
Laser Beam ◽  
Optical Tweezers ◽  
Optical Trapping ◽  
Viscosity Measurements ◽  
Two Photon ◽  
Vibration Detection ◽  
Holographic Optical Tweezers ◽  
Versatile Tool ◽  
Micro Tool

Manipulation of micro- and nano-sized objects with optical tweezers is a well established, albeit still evolving technique. While many objects can be trapped directly with focused laser beam(s), for some applications indirect manipulation with tweezers-operated tools is preferred. We introduce a simple, versatile micro-tool operated with holographic optical tweezers. The 40 µm long dumbbell-shaped tool, fabricated with two-photon laser 3D photolithography has two beads for efficient optical trapping and a probing spike on one end. We demonstrate fluids viscosity measurements and vibration detection as examples of possible applications.

scholarly journals Single-Cell Elasticity Measurement with an Optically Actuated Microrobot

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 882
Author(s):  
István Grexa ◽  
Tamás Fekete ◽  
Judit Molnár ◽  
Kinga Molnár ◽  
Gaszton Vizsnyiczai ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Target Cells ◽  
Lateral Direction ◽  
Two Photon ◽  
Holographic Optical Tweezers ◽  
Feasible Alternative ◽  
A Cell ◽  
Cell Elasticity ◽  
Force Range ◽  
Elasticity Measurement

A cell elasticity measurement method is introduced that uses polymer microtools actuated by holographic optical tweezers. The microtools were prepared with two-photon polymerization. Their shape enables the approach of the cells in any lateral direction. In the presented case, endothelial cells grown on vertical polymer walls were probed by the tools in a lateral direction. The use of specially shaped microtools prevents the target cells from photodamage that may arise during optical trapping. The position of the tools was recorded simply with video microscopy and analyzed with image processing methods. We critically compare the resulting Young’s modulus values to those in the literature obtained by other methods. The application of optical tweezers extends the force range available for cell indentations measurements down to the fN regime. Our approach demonstrates a feasible alternative to the usual vertical indentation experiments.

ROTATIONAL PROPERTIES OF MICRO-SLABS DRIVEN BY LINEARLY-POLARIZED LIGHT

2005 ◽  
Vol 14 (03) ◽  
pp. 375-382 ◽  
Author(s):  
CHIH-LANG LIN ◽  
IRÈNE WANG ◽  
MARC PIERRE ◽  
ISABELLE COLOMBIER ◽  
CHANTAL ANDRAUD ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Polarized Light ◽  
Polarization Plane ◽  
Light Polarization ◽  
Good Prediction ◽  
Polarization Anisotropy ◽  
Two Photon ◽  
Flat Slabs ◽  
Linearly Polarized ◽  
Optical Torque

We study the rotational motion of objects trapped in a focused laser beam (optical tweezers). Micrometer-sized flat slabs are fabricated using two-photon photopolymerization. These objects, trapped by linearly-polarized light, tend to align parallel to the polarization plane. This alignment effect is attributed to the polarization anisotropy resulting from the object shape and we present a simple electromagnetic approach to estimate the resulting optical torque. Micro-rotors of different sizes are studied experimentally. We characterize the behavior of micro-objects when the light polarization is rotated at constant speed. Our theoretical approach gives a good prediction of how the size of micro-objects affects their rotation efficiency.

Moving average process underlying the holographic–optical–tweezers experiments

2014 ◽  
Vol 53 (10) ◽  
pp. B254 ◽  
Author(s):  
Jakub Ślęzak ◽  
Sławomir Drobczyński ◽  
Karina Weron ◽  
Jan Masajada
Keyword(s):  
Optical Tweezers ◽  
Moving Average ◽  
Average Process ◽  
Moving Average Process ◽  
Holographic Optical Tweezers

scholarly journals Precise, contactless measurements of the surface tension of picolitre aerosol droplets

2016 ◽  
Vol 7 (1) ◽  
pp. 274-285 ◽  
Author(s):  
Bryan R. Bzdek ◽  
Rory M. Power ◽  
Stephen H. Simpson ◽  
Jonathan P. Reid ◽  
C. Patrick Royall
Keyword(s):  
Surface Tension ◽  
Optical Tweezers ◽  
Holographic Optical Tweezers ◽  
Contactless Measurements

Precise measurements of the surface tension and viscosity of airborne picolitre droplets can be accomplished using holographic optical tweezers.

Aberration correction in holographic optical tweezers using a high-order optical vortex: publisher’s note

2018 ◽  
Vol 57 (17) ◽  
pp. 4857
Author(s):  
Yansheng Liang ◽  
Yanan Cai ◽  
Zhaojun Wang ◽  
Ming Lei ◽  
Zhiliang Cao ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Optical Vortex ◽  
High Order ◽  
Aberration Correction ◽  
Holographic Optical Tweezers

Wavefront engineering and holographic optical tweezers

2015 ◽  
pp. 319-344
Author(s):  
Philip Jones ◽  
Onofrio Marago ◽  
Giovanni Volpe
Keyword(s):  
Optical Tweezers ◽  
Holographic Optical Tweezers

scholarly journals Raman, Hyper-Raman, Hyper-Rayleigh and Two-Photon Excited Luminescence Microspectroscopy in an Optical Tweezers System

2003 ◽  
Vol 9 (S02) ◽  
pp. 164-165
Author(s):  
A. Fontes ◽  
K. Ajito ◽  
A. M. De Paula ◽  
A. R. Neves ◽  
W. L. Moreira ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Two Photon ◽  
Excited Luminescence

scholarly journals Assembly of 3-dimensional structures using programmable holographic optical tweezers

2004 ◽  
Vol 12 (22) ◽  
pp. 5475 ◽  
Author(s):  
Gavin Sinclair ◽  
Pamela Jordan ◽  
Johannes Courtial ◽  
Miles Padgett ◽  
Jon Cooper ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
3 Dimensional ◽  
Holographic Optical Tweezers
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