Diffractive optical elements with chiral-focusing properties for optical-trapping applications

Vijayakumar, Anupama; Ratnam, Mani Maran; Rosen, Jay; Vinoth, B. R.; Cheng, Chau Jern; Minin, Igor V.; Minin, Oleg V.

doi:10.1201/9780429447082-68

Cited by 2 publications

(3 citation statements)

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“…From Fig. 5, it is followed, that with an increase of K the phase twist near the optical axis showing the presence of OAM [59,60,65]. Secondly, there was a light redistribution from the focal plane of CSFZP to other axial planes that resulted an increase in the focal depth with an increase in K. On the other hand, in the case of CSA, with an increase in K there was a light redistribution to the center creating a vortex.…”

Section: Non-standard Modification Of Classical Diffraction Optics: Pmentioning

confidence: 88%

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Recent Trends in Optical Manipulation Inspired by Mesoscale Photonics and Diffraction Optics

Minin

2020

J-BPE

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The spatial resolution of conventional optics, which is need for nondestructively trapping of microobjects, is limited by diffraction to nearly half the wavelength. Despite this limitation, the use of optical methods is one of the main directions in biological and biomedical researches, since only the use of optical methods has a minimal effect on living organisms. Quick progress in this field is based on a large extent on the development of new optical technologies and significant progress in the mesoscale photonics enabled the researches to obtain novel, previously unachievable information. Below we discussed some recent trends in optical manipulations on wavelength scale based on diffractive elements mesoscale dielectric particles as a field localization object and classical diffractive optical elements with unusual properties.

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Section: Non-standard Modification Of Classical Diffraction Optics: Pmentioning

confidence: 88%

“…Important to note that CBSA and CSA have some advantages compared to existing DOEs for optical trapping applications [59,60,[65][66][67][68][69]. The absence of central peak in the optical field expands the applicability of CBSA to highly absorptive optical trapping specimens.…”

Section: Non-standard Modification Of Classical Diffraction Optics: Pmentioning

confidence: 99%

Recent Trends in Optical Manipulation Inspired by Mesoscale Photonics and Diffraction Optics

Minin

2020

J-BPE

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“…In the current manuscript, only a chirality order of 4 is studied. Preliminary studies on different chirality orders have been reported using Fresnel zone antennas designed for microwave [43] and optics [44]. We believe that further studies are necessary with other chirality orders in order to understand the optical trap qualities better.…”

Section: Discussionmentioning

confidence: 99%

Binary square axicon with chiral focusing properties for optical trapping

et al. 2019

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We introduce a novel phase-only diffractive optical element called chiral binary square axicon (CBSA). The CBSA is designed by linearly rotating the square half-period zones of the binary square axicon with respect to one another. A quadratic phase mask (QPM) is combined with the CBSA using modulo-2π phase addition technique to bring the far-field intensity pattern of CBSA at the focal plane of the QPM and to introduce quasi-achromatic effects. The periodically rotated zones of CBSA produces a whirlpool phase profile and twisted intensity patterns at the focal plane of QPM. The degree of twisting seen in the intensity patterns is dependent upon the angular step size of rotation of the zones. The intensity pattern was found to rotate around the optical axis along the direction of propagation. The phase patterns of CBSA with different angles of zone rotation are displayed on a phase-only spatial light modulator and the experimental results were found to match with the simulation results. To evaluate the optical trapping capabilities of CBSA, an optical trapping experiment was carried out and the optical fields generated by CBSA were used for trapping and rotating yeast cells.

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Diffractive optical elements with chiral-focusing properties for optical-trapping applications

Cited by 2 publications

References 1 publication

Recent Trends in Optical Manipulation Inspired by Mesoscale Photonics and Diffraction Optics

Recent Trends in Optical Manipulation Inspired by Mesoscale Photonics and Diffraction Optics

Binary square axicon with chiral focusing properties for optical trapping

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