Double-helix array structure using phase controlled interference of 6+6 beams

Samanta, Krishnendu; Joseph, Joby

doi:10.1016/j.optlaseng.2018.09.018

Cited by 11 publications

(5 citation statements)

References 32 publications

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“…These SLMs are liquid crystal on silicon (LCOS) devices, which in general are used to implement the flexibility of modulating the light in terms of phase, amplitude, state of polarization, intensity, propagation direction, or wave-vector. For 'phase-only' type SLMs, as reported in the previous studies [29][30][31][32][36][37][38][39][40], these can only modulate the phase of the diffracted beams according to the phase-mask addressed. However, an SLM is a polarization-sensitive device and delivers maximum efficiencies when the input light is polarized along its 'fast'-axis.…”

Section: Vector Approachmentioning

confidence: 97%

“…Most of the reported structures on PCIL have used the conventional umbrella geometry where the wave-vectors of (1, 2, ., N) beams are symmetrically arranged in the form of a cone around the central one (p = 0). A double-cone arrangement with 'N + N' phase-controlled beams interfering from opposite hemispheres can also be implemented with suitable phase-modulations to produce intertwined helices (6 + 6 beams) [39] or even chiral-woodpile structures (3 + 3 beams) [40] to further broaden or tune the circular dichroism range respectively. Thus, irrespective of the hemisphere, these beams can be generally described by…”

Section: Conventional Scalar Approachmentioning

confidence: 99%

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Study of polarization effects in phase-controlled multi-beam interference lithography towards the realization of sub-micron photonic structures

Sarkar¹,

Samanta²,

Joseph³

2020

J. Opt.

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In this study, we theoretically demonstrate the effect of polarization in the realization of the submicron woodpile and chiral helix photonic structures formed through multi-beams interference in an umbrella geometry using a phase-only spatial light modulator (SLM). The polarization states of the interfering beams play a decisive role in the formation of submicron features when the requisite high interference angle is imparted through reflective type multi-mirror arrangements. Leaving aside the scalar model for intensity distribution, we estimate the actual scenario by taking into account the contributing vector electric fields in such SLM based multi-mirror set-up. Comparing with different interference angles, we recognize the lower limit in structural periodicities obtainable without deforming the desired photonic structures. Numerical calculations of the transmittance response of such polarization induced structures are also compared in contrast to their analogous scalar counterpart. Moreover, this study is extended by conceptualizing the introduction of different polarization converter that can be used to manipulate the outcomes towards achieving desired structural features.

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Section: Vector Approachmentioning

confidence: 97%

Section: Conventional Scalar Approachmentioning

confidence: 99%

Study of polarization effects in phase-controlled multi-beam interference lithography towards the realization of sub-micron photonic structures

Sarkar¹,

Samanta²,

Joseph³

2020

J. Opt.

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“…The sheet of light in lattice light sheet microscopy [129,130] is decorated with suitable structured or lattice patterns. The lattices are the 2D or 3D complex structures [131][132][133][134] which are generated by the multiple beams interference and this facilitates to visualize 3D dynamics of the samples for large volumes at the subsecond intervals. The main advantage of lattice light-sheet illumination lies in its significantly less amount of photobleaching and phototoxicity.…”

Section: Current State-of-the-art and Outlookmentioning

confidence: 99%

An overview of structured illumination microscopy: recent advances and perspectives

Samanta¹,

Joseph²

2021

J. Opt.

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Structured illumination microscopy (SIM) is one of the most significant widefield super-resolution optical imaging techniques. The conventional SIM utilizes a sinusoidal structured pattern to excite the fluorescent sample; which eventually down-modulates higher spatial frequency sample information within the diffraction-limited passband of the microscopy system and provides around two-fold resolution enhancement over diffraction limit after suitable computational post-processing. Here we provide an overview of the basic principle, image reconstruction, technical development of the SIM technique. Nonetheless, in order to push the SIM resolution further towards the extreme nanoscale dimensions, several different approaches are launched apart from the conventional SIM. Among the various SIM methods, some of the important techniques e.g. TIRF, non-linear, plasmonic, speckle SIM etc are discussed elaborately. Moreover, we highlight different implementations of SIM in various other imaging modalities to enhance their imaging performances with augmented capabilities. Finally, some future outlooks are mentioned which might develop fruitfully and pave the way for new discoveries in near future.

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“…A non-diffractive double-helix beam is generated by axicons and a ±1 vortex phase plate, and the characteristics of the double-helix beam can be easily modified by selecting suitable optical components [28]. In light of this, a method for creating a hexagonal array of doublehelix structures using a phase-controlled interference technology has also been described [29]. More recently, a doublehelix focal field was created through wavefront shaping with a pure phase hologram loaded onto a spatial light modulator [30].…”

Section: Introductionmentioning

confidence: 99%

Creating spatial doughnut-spot arrays and double-helix focal fields with prescribed characteristics

Xie,

Yu,

Zeng

et al. 2024

J. Phys. D: Appl. Phys.

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Spatially controllable focal fields play a pivotal role in light manipulation and provide significant opportunities for precisely manipulating light–matter interactions in a wide range of applications. In particular, the double-helix focal field—characterized by a distinctive helical structure—exhibits exceptional optical properties, thus differentiating it apart from conventional focal fields. However, the rapid construction of a double-helix focal field with controllable characteristics and a uniform intensity remains a challenging task. Based on the theory of pattern synthesis of an antenna array, we propose and realize the generation of three-dimensional (3D) doughnut-spot arrays and double-helix focal fields with specified characteristics in a 4π system by reverse-solving the radiation field of the virtual antenna. Numerical examples indicate that the desired novel focal fields, including features such as shape, orientation, length, and period, could be rapidly, conveniently, and flexibly customized by selecting appropriate parameters for the magnetic dipole array antennas. This method could reveal an avenue for enhanced light manipulation for applications in materials processing, optical lithography, and optical communications.

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Double-helix array structure using phase controlled interference of 6+6 beams

Cited by 11 publications

References 32 publications

Study of polarization effects in phase-controlled multi-beam interference lithography towards the realization of sub-micron photonic structures

Study of polarization effects in phase-controlled multi-beam interference lithography towards the realization of sub-micron photonic structures

An overview of structured illumination microscopy: recent advances and perspectives

Creating spatial doughnut-spot arrays and double-helix focal fields with prescribed characteristics

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