Needles of light produced with a spherical mirror

Panneton, Denis; St-Onge, Guillaume; Piché, Michel; Thibault, Simon

doi:10.1364/ol.40.000419

Cited by 32 publications

(6 citation statements)

References 26 publications

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“…It is possible for other spatially shaped laser beams with a focal depth much longer than that of the Gaussian beam, such as light needles, to realize similar nanoholes on the sample surface of nanochannels in-depth direction 38 – 40 The effectiveness of the surface assisting material ejection effect can be proved both experimentally and theoretically. The crater and interior cavity observed when the pulse energy of the femtosecond pulse is high proves the co-existence of the superficial and internal hot domain.…”

Section: Discussionmentioning

confidence: 99%

Nanochannels with a 18-nm feature size and ultrahigh aspect ratio on silica through surface assisting material ejection

Lin

Chen

et al. 2022

Adv. Photon. Nexus

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Nanochannel structures with a feature size deeply under the diffraction limit and a high aspect ratio hold huge biomedical significance, which is especially challenging to be realized on hard and brittle materials, such as silica, diamond, and sapphire. By simultaneously depositing the pulse energy on the surface and inside the sample, nanochannels with the smallest feature size of 18 nm (∼1∕30λ) and more than 200 aspect ratios are achieved inside silica, the mechanism of which can be concluded as the surface assisting material ejection effect. Both the experimental and theoretical results prove that the coaction of the superficial "hot domain" and internal hot domain dominates the generation of the nanochannels, which gives new insights into the laser-material interacting mechanisms and potentially promotes the corresponding application fields.

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Section: Discussionmentioning

confidence: 99%

Nanochannels with a 18-nm feature size and ultrahigh aspect ratio on silica through surface assisting material ejection

Lin

Chen

et al. 2022

Adv. Photon. Nexus

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“…Tight-focusing vector beams were an effective method to generate optical needles that own the above properties. By now, reversed dipole radiation arrays, paraxial spherical mirrors focusing, 4π focusing system, and wavefront modulation were the main methods for the generation of optical needles by tight focusing vector beams [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In addition, some special methods were used to generate ultra-long optical needle.…”

Section: Introductionmentioning

confidence: 99%

Generation of ultra-long optical needles with dual-ring cosine filter

Zhang,

Wu,

Lan

et al. 2023

Phys. Scr.

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Combining the advantages of phase and amplitude modulation, we designed a dual-ring cosine filter which was consisted by an inner and outer ring, and the two rings have different number of paired cosine phase. Using the dual-ring cosine filter, ultra-long longitudinally polarized optical needles were obtained by tight focusing radially polarized Bessel-Gaussian beams with single lens system. And the obtained optical needles have depth of focus of 268λ, lateral full width of 0.37λ at half height, beams quality of 94% and axial uniformity of 95%. In addition, we found that the depth of focus of obtained optical needles can be further stretched and the lateral dimension can be further compressed by increasing the number of paired cosine phase. The ultra-long optical needles were appropriately applied in the fields of optical beams lithography, laser direct writing, particle acceleration and optical trapping.

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“…In this paper, we propose a new method to generate super-resolved optical fields by focusing complex input field. Such optical fields have large longitudinal full width at half maximum (LFWHM) and small transverse full width at half maximum (TFWHM), so they are called optical needles [4,5]. The input field comprise radially polarized beam and azimuthally polarized vortex beams.…”

Section: Introductionmentioning

confidence: 99%

Optical needles with arbitrary homogeneous three-dimensional polarization

Li¹,

Wang²,

Chen³

2020

Opt. Express

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we propose a new method to generate optical needles by focusing vector beams comprised of radially polarized component and azimuthally polarized vortex components. The radial part can generate longitudinal polarization, while the azimuthal parts can generate left-and right-handed polarization. Hence, an arbitrary 3D polarization can be obtained. To our knoeledge, it may be the first time that arbitrarily polarized optical needles whose transverse sizes are under 0.5λ have been achieved. And their polarized homogeneity is beyond 0.97. arXiv:1912.05803v1 [physics.optics]

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Needles of light produced with a spherical mirror

Cited by 32 publications

References 26 publications

Nanochannels with a 18-nm feature size and ultrahigh aspect ratio on silica through surface assisting material ejection

Nanochannels with a 18-nm feature size and ultrahigh aspect ratio on silica through surface assisting material ejection

Generation of ultra-long optical needles with dual-ring cosine filter

Optical needles with arbitrary homogeneous three-dimensional polarization

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