Polarization dependent nanostructuring of silicon with femtosecond vortex pulse

Rahimian, M. G.; Bouchard, Frédéric; Al-Khazraji, H.; Karimi, Ebrahim; Corkum, P. B.; Bhardwaj, V. R.

doi:10.1063/1.4999219

Cited by 39 publications

(21 citation statements)

References 47 publications

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“…The use of ultrafast (picosecond–femtosecond) lasers for irradiation may minimize optothermal effects and collateral damage of the material surfaces. For instance, Rahimian et al created cone‐shaped nanostructures with a twist and an extremely smooth circular rim (without any debris arising from laser‐induced thermal effects) on a silicon substrate by the deposition of a single femtosecond OAM pulse with zero‐TAM, i.e., ℓ = ±1 and s = ∓1 ( Figure ) . The fabricated nanostructures exhibited a tip curvature of ≈70 nm, and a height of 350–1000 nm.…”

Section: Helical Structuresmentioning

confidence: 99%

“…a,b) SEM and c,d) AFM images of nanostructures created on p‐type silicon by irradiation with a femtosecond vortex laser pulse (ℓ = −1, s = +1) with pulse energies of (a,c) 150 nJ and (b,d) 310 nJ. Reproduced with permission . Copyright 2017, American Institute of Physics.…”

Section: Helical Structuresmentioning

confidence: 99%

Section: Helical Structuresmentioning

confidence: 99%

See 2 more Smart Citations

A New Twist for Materials Science: The Formation of Chiral Structures Using the Angular Momentum of Light

Omatsu

Miyamoto

Toyoda

et al. 2019

Advanced Optical Materials

118

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and various applications particularly at the microscopic scale. This includes optical trapping and manipulation, [4][5][6] optical telecommunications, [7,8] quantum physics, [9] and "super-resolution" microscopy with a spatial resolution beyond the diffraction limit. [10][11][12] New applications for OAM fields have also been proposed in environmental optics and free-space telecommunication. As an example OAM states can potentially propagate though air turbulence with lower degradation than a conventional Gaussian beam. [13,14] New physical effects include studies such as the rotational Doppler effect originating from interactions of such fields and rotating objects that may provide new technologies for remote sensing of rotating bodies in astrophysics. [15,16] In this area of original physical demonstrations, recent studies have shown that irradiation by such an OAM field can twist materials, such as metal, silicon, azo-polymer, and even a liquid-phase resin with the help of spin angular momentum (SAM) of circularly polarized light with the rotating electric field. This can thus shape helical nano/microstructures. [17][18][19][20][21][22][23][24] Going beyond fundamental aspects, twisted materials created by such OAM fields may provide a new understanding of interactions between optical fields and matter on the subwavelength scale that may reveal new physics, e.g., spin-orbit coupling effects or unconventional optomechanical effects for moving beyond traditional forms of optical manipulation. Furthermore, twisted materials created by such OAM fields, will provide a new understanding of interactions between optical fields and matter on a subwavelength scale. For example, the twisted materials manifest the role of both SAM and OAM of light fields and the coupling of SAM and OAM (so-called spin-orbit coupling) effects. This coupling is key not only for understanding fundamental physics but also for controlling optical material structures.Conventional optical tweezers rely on the field gradients near the diffraction limited focus of a laser beam to hold mesoscopic particles solely with focused light beams. However, the technique often fails to efficiently trap and manipulate particles at the nanoscale because the gradient force scales with the volume of the particle (for a dielectric object) and is proportional to the particle's polarizability. In this domain, advanced materials science and nanofabrication technologies have made remarkable progress in structured devices, e.g., photonic crystals, metamaterials, and metasurfaces. These devices offer novel trapping geometries to enhance the interaction between optical fields and materials at the nanoscale. Furthermore, these devices allow the control of Recent work has shown that irradiation with light possessing orbital angular momentum (OAM) and an associated phase singularity, that is an optical vortex, twists a variety of materials. These include silicon, azo-polymer, and even liquid-phase resins to form various helically structured materials. This article provides...

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Section: Helical Structuresmentioning

confidence: 99%

Section: Helical Structuresmentioning

confidence: 99%

See 1 more Smart Citation

A New Twist for Materials Science: The Formation of Chiral Structures Using the Angular Momentum of Light

Omatsu

Miyamoto

Toyoda

et al. 2019

Advanced Optical Materials

118

View full text Add to dashboard Cite

show abstract

“…The optical vortex has been widely applied in a variety of fields, such as optical trapping and manipulation [6][7][8][9][10][11][12], optical metrology [13][14][15], fiber-based or free-space optical communication [16][17][18][19][20][21][22][23][24], quantum computing [25][26][27], cold atom physics [28][29][30][31][32], astrophysics [33][34][35], and material processing [36,37]. Furthermore, an optical vortex enables the twisting of a variety of materials, such as metals [38][39][40][41], semiconductors [42,43], azopolymers [44][45][46], and even liquid-resin to shape helical nano/microscale structures. Such helical structures are expected to offer new research avenues, for example, chiral selective imaging systems (e.g., atomic force microscopes [47]), optoelectro-mechanical systems, and plasmon-enhanced chiral metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Generation of coupled orbital angular momentum modes from an optical vortex parametric laser source

Mamuti¹,

Goto²,

Miyamoto³

et al. 2019

Opt. Express

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We report on the generation of flower (wheel) modes, which manifest coupled orbital angular momentum (OAM) modes, from a vortex pumped optical parametric oscillator simply by employing a pump source with a short temporal coherence time. This vortex oscillator was also developed to generate a further higher-order vortex signal output with ℓs=2-4 by replacement of the pump source with a longer coherence time. The signal and idler outputs were tuned within wavelength ranges of 745-955 nm and 1200-1855 nm, respectively. The maximum signal output energy of 1.2 mJ was measured with an optical efficiency of 15.6%.

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“…For example, optical vortex beams with nanosecond pulse duration have been exploited to fabricate chiral micro-needles on various materials (e.g. metals, silicon and azo-polymer) 7 , 8 , while a variety of structures have been achieved with fs pulses (e.g., silicon nano-cones 9 , polymer micro-tubes 10 , graphene micro- and nano-disks 11 , nano-cavities in glasses 12 , etc.). An amazing property of fs laser pulses is the ability to trigger the formation of self-organized quasi-periodic surface patterns, generally indicated as laser-induced periodic surface structures (LIPSS) 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

Surface structures with unconventional patterns and shapes generated by femtosecond structured light fields

Nivas

Allahyari

Cardano

et al. 2018

Sci Rep

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We present an investigation on ultrashort laser surface structuring with structured light fields generated by various q-plates. In particular, q-plates with topological charges q = 1, 3/2, 2, 5/2 are used to generate femtosecond (fs) vector vortex beams, and form complex periodic surface structures through multi-pulse ablation of a solid crystalline silicon target. We show how optical retardation tuning of the q-plate offers a feasible way to vary the fluence transverse distribution of the beam, thus allowing the production of structures with peculiar shapes, which depend on the value of q. The features of the generated surface structures are compared with the vector vortex beam characteristics at the focal plane, by rationalizing their relationship with the local state of the laser light. Our experimental findings demonstrate how irradiation with fs complex light beams can offer a valuable route to design unconventional surface structures.

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Polarization dependent nanostructuring of silicon with femtosecond vortex pulse

Cited by 39 publications

References 47 publications

A New Twist for Materials Science: The Formation of Chiral Structures Using the Angular Momentum of Light

A New Twist for Materials Science: The Formation of Chiral Structures Using the Angular Momentum of Light

Generation of coupled orbital angular momentum modes from an optical vortex parametric laser source

Surface structures with unconventional patterns and shapes generated by femtosecond structured light fields

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