Optically driven micromachines: progress and prospects

Nieminen, Timo A.; Higuet, J.; Knöner, Gregor; Loke, Vincent L. Y.; Parkin, Simon J.; Singer, Wolfgang; Heckenberg, N. R.; Rubinsztein‐Dunlop, Halina

doi:10.1117/12.651760

Cited by 20 publications

(31 citation statements)

References 95 publications

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“…In the presence of an illuminating electromagnetic field, this object starts rotating. Similar structures have been indeed experimentally realized [43,44].…”

Section: Further Numerical Experimentssupporting

confidence: 63%

Computational toolbox for optical tweezers in geometrical optics

Callegari¹,

Mijalkov²,

Gököz³

et al. 2015

J. Opt. Soc. Am. B

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Optical tweezers have found widespread application in many fields, from physics to biology. Here, we explain in detail how optical forces and torques can be described within the geometrical optics approximation and we show that this approximation provides reliable results in agreement with experiments for particles whose characteristic dimensions are larger than the wavelength of the trapping light. Furthermore, we provide an object-oriented software package implemented in MatLab for the calculation of optical forces and torques in the geometrical optics regime: OTGOOptical Tweezers in Geometrical Optics. We provide all source codes for OTGO as well as the documentation and code examples -e.g., standard optical tweezers, optical tweezers with elongated particle, windmill effect, Kramers transitions between two optical traps -necessary to enable users to effectively employ it in their research and teaching.

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“…In the presence of an illuminating electromagnetic field, this object starts rotating. Similar structures have been indeed experimentally realized [43,44].…”

Section: Further Numerical Experimentssupporting

confidence: 63%

Computational toolbox for optical tweezers in geometrical optics

Callegari¹,

Mijalkov²,

Gököz³

et al. 2015

J. Opt. Soc. Am. B

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“…Since the pioneering work by Ashkin et al [1][2][3], light-induced mechanical effects have been widely used for trapping, transportation, orientation and localization of micro-particles (see, e.g., Refs [4][5][6][7][8]. ), as well as for the study of fine structure of light fields [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Self-action of continuous laser radiation and Pearcey diffraction in a water suspension with light-absorbing particles

Angelsky¹,

Bekshaev²,

Maksimyak³

et al. 2014

Opt. Express

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“…Another proven application is in optical manipulation [29][30][31][32][33], where the capacity to exert a far greater torque than a regular circularly polarized beam has earned the technique the name "optical spanners (wrench)" [34][35][36][37]. There are also numerous methods utilizing structured light in imaging applications, edge contrast enhancement [38] and microparticle trapping [39], for example.…”

Section: Introductionmentioning

confidence: 99%

Direct generation of optical vortices

2014

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A detailed scheme is established for the direct generation of optical vortices, signifying light endowed with orbital angular momentum. In contrast to common techniques based on the tailored conversion of the wave front in a conventional beam, this method provides for the direct spontaneous emission of photons with the requisite field structure. This form of optical emission results directly from the electronic relaxation of a delocalized exciton state that is supported by a ringlike array of three or more nanoscale chromophores. An analysis of the conditions leads to a general formulation revealing a requirement for the array structure to adhere to one of a restricted set of permissible symmetry groups. It is shown that the coupling between chromophores within each array leads to an energy level splitting of the exciton structure, thus providing for a specific linking of exciton phase and emission wavelength. For emission, arrays conforming to one of the given point-group families' doubly degenerate excitons exhibit the specific phase characteristics necessary to support vortex emission. The highest order of exciton symmetry, corresponding to the maximum magnitude of electronic orbital angular momentum supported by the ring, provides for the most favored emission. The phase properties of the emission produced by the relaxation of such excitons are exhibited on plots which reveal the azimuthal phase progression around the ring, consistent with vortex emission. It is proven that emission of this kind produces electromagnetic fields that map with complete fidelity onto the phase structure of a Laguerre-Gaussian optical mode with the corresponding topological charge. The prospect of direct generation paves the way for practicable devices that need no longer rely on the modification of a conventional laser beam by a secondary optical element. Moreover, these principles hold promise for the development of a vortex laser, also based on nanoscale exciton decay, enabling the production of coherent radiation with a tailor-made helical wave front.

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Optically driven micromachines: progress and prospects

Cited by 20 publications

References 95 publications

Computational toolbox for optical tweezers in geometrical optics

Computational toolbox for optical tweezers in geometrical optics

Self-action of continuous laser radiation and Pearcey diffraction in a water suspension with light-absorbing particles

Direct generation of optical vortices

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