Optical vortex arrays from smectic liquid crystals

Son, Baek-Sik; Kim, Sejeong; Kim, Yun Ho; Käläntar, K.; Kim, Hwi-Min; Jeong, Hyeonsu; Choi, Siyoung Q.; Shin, Jonghwa; Jung, Hee‐Tae; Lee, Jun Young

doi:10.1364/oe.22.004699

Cited by 39 publications

(20 citation statements)

References 30 publications

(35 reference statements)

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“…The system has huge advantages compared with previous systems because its self-organization offers highly tunable structures that do not require special surface modifications. The structure can be used directly for diffractive microlens arrays, generation of multiple vortex beams using LC mesophases366162636465 as foreseen applications. Because our system is self-repairing, it could be applied for sensor applications using director distortion.…”

Section: Discussionmentioning

confidence: 99%

Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals

et al. 2016

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Topological defects in nematic liquid crystals are ubiquitous. The defects are important in understanding the fundamental properties of the systems, as well as in practical applications, such as colloidal self-assembly, optical vortex generation and templates for molecular self-assembly. Usually, spatially and temporally stable defects require geometrical frustration imposed by surfaces; otherwise, the system relaxes because of the high cost of the elastic energy. So far, multiple defects are kept in bulk nematic liquid crystals by top-down lithographic techniques. In this work, we stabilize a large number of umbilical defects by doping with an ionic impurity. This method does not require pre-patterned surfaces. We demonstrate that molecular reorientation controlled by an AC voltage induces periodic density modulation of ions accumulated at an electrically insulating polymer interface, resulting in self-organization of a two-dimensional square array of umbilical defects that is reconfigurable and tunable.

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Section: Discussionmentioning

confidence: 99%

Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals

et al. 2016

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“…Based on the vortex induction process, the realization of programmable lattices of optical vortices with arbitrary distributions in space has been demonstrated [46]. Vortex lattices can also be obtained with other liquid-crystal systems, as confined cholesterics [47,48], smectic cells [49][50][51], nematics driven by segmented electrodes [52], and nematics driven by magnetic fields [53].…”

Section: Generation Of Optical Vorticesmentioning

confidence: 99%

Optical vortex induction via light–matter interaction in liquid-crystal media

et al. 2015

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“…Furthermore, Lee et al. produced a closely‐packed OVA using self‐assembled defects in smectic liquid crystals, which have a constant topological charge(TC) of 2 . Moreover, based on optical emission from molecular chromophore nanoarrays, Andrews et al.…”

Section: Introductionmentioning

confidence: 99%

Generation of Circular Optical Vortex Array

Tai

et al. 2017

Annalen der Physik

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We report on a novel optical vortex array named circular optical vortex array, which is generated by the superposition of two concentric perfect optical vortices. The circular optical vortex array has a constant topological charge of +1 or −1, the number and sign of which are determined by the topological charges of the two perfect optical vortices. Moreover, the radius of the circular optical vortex array is easily adjusted by using the cone angle of an axicon. Furthermore, the circular optical vortex array and multiple circular optical vortex array can be rotated by changing the initial phase difference of the perfect optical vortices on demand. This work demonstrates a complex structured optical field, which is of significance for applications such as optical tweezers, micro-particle manipulation, and optical imaging.

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Optical vortex arrays from smectic liquid crystals

Cited by 39 publications

References 30 publications

Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals

Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals

Optical vortex induction via light–matter interaction in liquid-crystal media

Generation of Circular Optical Vortex Array

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