Generation of continuously rotating polarization by combining cross-polarizations and its application in surface structuring

Lam, Billy; Zhang, Jihua; Chen, Guo

doi:10.1364/ol.42.002870

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…Instead of having a uniform symmetry, the herringbone LIPSSs we produce have axial symmetry along the channel they form along and are orientated at an acute angle to the polarization, as opposed to standard LIPSSs, which tend to form either perpendicular or parallel to the laser's polarization [26]. Spatially modulated LIPSSs have been observed by others before, by producing periodic structures with differing orientation in different spatial locations [21,27,28]. However, unlike other spatially modulating LIPSS structures, herringbone LIPSSs are produced using only a single beam and form with axially symmetry.…”

Section: Introductionmentioning

confidence: 83%

Femtosecond laser-induced herringbone patterns

2018

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Femtosecond laser-induced herringbone patterns are formed on copper (Cu). These novel periodic structures are created following s-polarized, large incident angle, femtosecond laser pulses. Forming as slanted and axially symmetric laser-induced periodic surface structures along the side walls of ablated channels, the result is a series of v-shaped structures that resemble a herringbone pattern. Fluence mapping, incident angle studies, as well as polarization studies have been conducted and provide a clear understanding of this new structure.

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Section: Introductionmentioning

confidence: 83%

Femtosecond laser-induced herringbone patterns

2018

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“…Allegre et al constructed a polarization beam generation method using a single SLM and a λ/4 wave plate [10]. In [11], Lam et al developed a beam modulator composed of a transmissive SLM and a quarter-wave plate, which is capable of generating continuously rotating polarization by combing cross-polarizations. In [12], Ono et al utilized a single SLM, two QWPs, and four HWPs to generate a vector hologram beam, where the SLM controlled the polarization distribution in the cross-section of the two writing beams.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Phase and Polarization Modulation Using Two-Beam Parallel Coding for Optical Storage in Transparent Materials

Hong

Chu

2022

Sensors

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In this paper, we propose and experimentally demonstrate a parallel coding and two-beam combining approach for the simultaneous implementation of dynamically generating holographic patterns at their arbitrary linear polarization states. Two orthogonal input beams are parallelly and independently encoded with the same target image information but there is different amplitude information by using two-phase computer-generated holograms (CGH) on two Liquid-Crystal-on-Silicon-Spatial-Light Modulators (LCOS SLMs). Two modulated beams are then considered as two polarization components and are spatially superposed to form the target polarization state. The final linear vector beam is created by the spatial superposition of the two base beams, capable of controlling the vector angle through the phase depth of the phase-only CGHs. Meanwhile, the combined holographic patterns can be freely encoded by the holograms of two vector components. Thus, this allows us to tailor the optical fields endowed with arbitrary holographic patterns and the linear polarization states at the same time. This method provides a more promising approach for laser data writing generation systems in the next-generation optical data storage technology in transparent materials.

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“…A phase-only liquidcrystal SLM was used to convert a linearly polarized femtosecondpulse laser beam to radially or azimuthally polarized vortex beams. In [17], Lam et al developed a generation method of continuously rotating polarization by combing cross-polarizations. The beam modulator is composed of an SLM and a quarter-wave plate.…”

Section: Introductionmentioning

confidence: 99%

Efficient dynamic control method of light polarization using single phase-only liquid crystal on silicon spatial light modulators for optical data storage

Hong¹,

Li²,

Chu³

2021

Appl. Opt.

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The technology of five-dimensional (5D) optical data storage in transparent materials paves a promising way to unlimited lifetime data storage for future cloud use. Phase-only liquid-crystal-on-silicon spatial light modulators (LCOS SLMs) have already exhibited its potential for this application in tailoring ultrafast laser writing beams for 5D optical data storage. A phase-only LCOS SLM can generate arbitrary data patterns by using diffractive holographic imaging for data writing light beam generation. However, the polarization control of the output holographic image is still achieved by using an external polarization modulator, which leads to complications, bulkiness, and large delays in current methods. In this paper, we presented an efficient phase and polarization modulation method through a compact system based on a single phase-only LCOS SLM to simultaneously control both the holographic image and its polarization state. The proposed method utilizes two-polarization-component coding in conjunction with a polarization component rotation technique in a compact system. Using this polarization rotation technique, two light components can be independently coded by separately using two holograms on two halves of the LCOS SLM. We experimentally construct a proof-of-concept prototype of the compact system, and the effectiveness of the system has been experimentally verified.

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Generation of continuously rotating polarization by combining cross-polarizations and its application in surface structuring

Cited by 14 publications

References 22 publications

Femtosecond laser-induced herringbone patterns

Femtosecond laser-induced herringbone patterns

Dynamic Phase and Polarization Modulation Using Two-Beam Parallel Coding for Optical Storage in Transparent Materials

Efficient dynamic control method of light polarization using single phase-only liquid crystal on silicon spatial light modulators for optical data storage

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