Technical University of Denmark

Programmable Phase Optics

Home

People

Research

Publications

Projects

Jobs

Contact


Research



The Generalised Phase Contrast method Advanced optical micro-manipulation Phase-only optical encryption and decryption Spatial phase-only modulation by the reverse phase contrast method GPC implemented in plana-integrated micro-optics Complex field coupling to advanced optical fibers 2D polarization encoding using Spatial light modulators

Fully dynamic multiple-beam optical micromanipulators

Optical traps are useful for a wide range of inter-disciplinary research where structures in the micro- and nano-scale have to be manipulated. When an array of particles has to be trapped simultaneously and manipulated independently, there is a need to generate multiple trapping-beams where the shape, size, position and intensity of each beam can be controlled individually and preferably manipulated in real-time.

We work with a technique that makes it possible to obtain fully dynamic multiple-beam optical traps (see further reading), using the GPC method and a computer-controlled liquid-crystal phase-only spatial light modulator (Hamamatsu Photonics).

Figure 1. Generic system layout for a GPC-based system generating multiple dynamic tweezer-beams at the output.

Dynamic manipulation of multiple particles has been performed using the system shown in fig. 1. The examples below shows trapping and dynamic manipulation of micron sized particles while the particles are viewed under a microscope.

Simultaneous manipulation of twelve polystyrene microspheres by controllably assigning different 3D trajectories for each particle using GPC-synthesized multiple counterpropagating-beam traps. (View /download multimedia file 2.5 MB; See Rodrigo, et al)


Reported October 2004

User-coordinated patterning of commercially-dyed microspheres into characters "G P C" (choosing one color for each character) either in the same plane or in three different planes using GPC-synthesized multiple counterpropagating-beam traps. (See Rodrigo, et al)


Reported October 2004

Manipulation of nine SiO2 microspheres into a 3D crystal-like structure using GPC-synthesized multiple counterpropagating-beam traps. (View /download multimedia file 2.5 MB; See Rodrigo, et al)


Reported October 2004

Manipulation of mixed low-index and high-index particles. Laser = 800 mW (of max 1.6W) CW Ti:S at 830 nm. (View /download multimedia file 1480 KB; See Rodrigo, et al)


Reported January 2004

Interactive sorting of low- and high-index particles using mixed types of optical traps. Laser = 800 mW (of max 1.6W) CW Ti:S at 830 nm. (View /download multimedia file 1080 KB; See Rodrigo, et al)


Reported January 2004

Manipulation of low-index particles using dark optical traps. Laser = 800 mW (of max 1.6W) CW Ti:S at 830 nm. (View /download multimedia file 2450 KB; See Rodrigo, et al)


Reported December 2003

Deflection of a low-index particle by a top-hat beam.


Reported December 2003

Manipulation of low-index particles using dark optical traps. Laser = 200 mW Laser diode at 830 nm. (View /download multimedia file 1660 KB; See Daria, et al)


Reported July 2003

Interactive sorting of colored 3 micron beads. Laser = 200 mW Laser diode at 830 nm. (View/download multimedia file 3532 KB; See Rodrigo, et al)


Reported November 2002

Interactive sorting of 2 and 5 micron beads. Laser = 200 mW Laser diode at 830 nm. (View/download multimedia file 2104 KB; See Rodrigo, et al)


Reported October 2002

Interactive manipulation of bakers yeast cells. Laser = 200 mW Laser diode at 830 nm. (See Daria, et al)


Reported August 2002

8 Polystyrene particles. The untrapped particles at the bottom of the frame are moving freely due to Brownian motions. Laser = 200 mW Laser diode at 830 nm. (View/download multimedia file 195 KB; See Eriksen, et al.)


Reported February 2002

Single beam optical tweezers has been used to spin an 8 micron sized calcite particle using circularly polarised light carrying angular momentum.  


Reported in 2001


 

Further reading

P. J. Rodrigo,  V. R. Daria, and J. Glückstad, "Four-dimensional optical manipulation of colloidal particles," Appl. Phys. Lett. 86, 074103 (2005). (Online access) (PDF)

P. J. Rodrigo, V. R. Daria, and J. Glückstad, “Optical manipulation of high- and low-index particles and living cells,” Optics & Photonics News 15 - Special issue: Optics in 2004, 20 (2004). (Online access)

P. J. Rodrigo, V. R. Daria, and J. Glückstad, “Real-time three-dimensional optical micromanipulation of multiple particles and living cells," Opt. Lett. 29, 2270-2272 (2004). (Online access)

P. J. Rodrigo, V. R. Daria, and J. Glückstad, Real-time interactive optical micromanipulation of a mixture of high-and low-index particles, Opt. Express 12, 1417-1425 (2004)(Online access) 

Daria, V.R.; Rodrigo, P.J.; Glückstad, J., Dynamic formation of optically trapped microstructure arrays for biosensor applications. Biosensors and Bioelectronics (Special issue on Micro and Nano Bioengineering) 19, 11, 1439-1444 (2004) 
(Online access)

Glückstad, J., Sorting particles with light. Nature Materials 3, 9-10 (2004) 
(Online access)

Daria, V.R.; Rodrigo, P.J.; Glückstad, J., Dynamic array of dark optical traps. Applied Physics Letters 84, 323-325 (2004) 
(Online access)

Rodrigo, P.J.; Daria, V. R., Glückstad, J., Multiple dynamic optical traps facilitate active microscopy. Optics & Photonics News 14, 20 (2003)

Eriksen, R.L.; Rodrigo, P.J.; Daria, V.R.; Glückstad, J; Spatial light modulator controlled alignment and spinning of birefingent particles optically trapped in an array. Applied Optics (2003) 42, 5107-5111

Eriksen R.L.; Daria V.R.M.; Rodrigo, P.J. and Glückstad J; Computer-controlled orientation of multiple optically-trapped microscopic particles, Microelectronics Eng. (2003) 67-68, 872-878

Rodrigo, P. J.; Eriksen, R.L.; Daria, V.R.M.; Glückstad, J., Interactive light-driven and parallel manipulation of inhomogeneous particles. Opt. Express (2002) 10, 1550-1556. Full text version. 

Daria, V.R.M.; Eriksen, R.L.; Glückstad, J., Dynamic optical manipulation of colloidal structures using a spatial light modulator. Journ of Mod Opt (2003) 50, 1601-1614

Eriksen, R.L.; Daria, V.R.M.; Glückstad, J., Fully dynamic multiple-beam optical tweezers. Opt. Express (2002) 10, 597-602.

Eriksen, R.L.; Mogensen, P.C.; Glückstad, J., Multiple-beam optical tweezers generated by the generalized phase-contrast method. Opt. Lett. (2002) 27, 267-269

Mogensen, P.C.; Glückstad, J., Dynamic array generation and pattern formation for optical tweezers. Opt. Commun. (2000) 175, 75-81


Glückstad, J.; Mogensen, P.C., Reconfigurable ternary-phase array illuminator based on the generalised phase contrast method. Opt. Commun. (2000) 173, 169-175


website design by: VR Daria
Last update: 23-04-2009