diamond slicing using ultrashort laser-induced

Phys. Rev. B 97, 014310 (2018)

An idea of controlling hyperbolic dispersion of dielectric materials by an ultrashort laser pulse is proposed. Taking the diamond as a concrete example and using time-dependent density functional theory calculations, we show that the permittivity tensor of the material can be effectively tuned by an ultrashort laser pulse, serving as a transient hyperbolic medium with wide working frequency

Diamond slicing using ultrashort laser

Diamond slicing using ultrashort laser-induced graphitization and additional nanosecond laser illumination Author links open overlay panel Haruna Hirai a Hirofumi Hidai a Souta Matsusaka a Akira Chiba a Yoshiaki Mokuno b Makoto Yamaguchi c Noboru Morita a

Electric field vector measurements via nanosecond electric

Electric-field-induced second-harmonic generation, or E-FISH, has received renewed interest as a nonintrusive tool for probing electric fields in gas discharges and plasmas using ultrashort laser pulses. An important contribution of this work lies in establishing that

Laser

View program details for SPIE Laser Damage conference on Laser-induced Damage in Optical Materials 2019 Monday, 23 September 2019 8:00 AM - 8:30 AM Location: Centennial Ballroom Award Winners for Laser Damage 2018 The Alexander Glass Best Oral Presentation Award 1st Place Best Oral Presentation Revisiting of the laser induced filamentation damage conditions in fused silica for energetic laser

Ultrashort pulse laser slicing of semiconductor crystal

Meanwhile, by the convention wire-saw technique, it is difficult to slice off a thin wafer from bulk SiC crystal without the reserving space for cutting. In this study, we have achieved exfoliation of 4H-SiC single crystal by femtosecond laser induced slicing method. By using this, the exfoliated surface with the root-mean-square roughness of 3 μm and the cutting-loss thickness smaller than

Experimental and theoretical investigation of ultrashort

Diamond is a wide bandgap material, which exhibits an abrupt increase of its free-electron density, when excited by an ultrashort laser pulse. The generation of free electrons transforms the insulator diamond to a conducting material with metallic optical behavior.

Latent laser

2016/3/3We are interested primarily in internal changes in the crystal produced during the initial phase which hypothetically can be associated with the latent graphitization of diamond. The key question here is whether the duration of this phase (e.g. expressed in terms of N g value) is functionally related to intensity of laser light. . If not, the process of laser-induced damage is stochast

Picosecond

Picosecond-laser-induced structural modifications in the bulk of single-crystal diamond 675 Fig. 2 Optical images of the microstructures produced in the bulk of a CVD single-crystal diamond plate at different pulse energies: (a)1J,(b) 3 J, and (c)5J(atf =10 kHz), and of different parts of a through

Single Cell Bioprinting with Ultrashort Laser Pulses

For fs laser‐induced single cell sorting and transfer, the fs laser beam (λ = 1030 nm, 600 fs, Spectra Physics, Rankweil, Austria) was coupled in an inverted epifluorescence microscope (Nikon Ti‐E) by using a dichroic mirror (Figure 1a), which is highly reflective in

(PDF) Nonthermal graphitization of diamond induced

Inside the diamond, the electrons from tungsten will further lose their energy into the ma- FIG. 7 :7Schematic picture of the multilayer tungsten-diamond structure, irradiated with a laser pulse; the violet lines represent photons (hv), the red arrows stand for

Laser in micro and nanoprocessing of diamond materials

Haruna Hirai, Hirofumi Hidai, Souta Matsusaka, Akira Chiba, Yoshiaki Mokuno, Makoto Yamaguchi, Noboru Morita, Diamond slicing using ultrashort laser-induced graphitization and additional nanosecond laser illumination, Diamond and Related Materials, (2019).

Ultrashort pulse laser slicing of wide bandgap 4H

Ultrashort pulse laser slicing of wide bandgap 4H-SiC crystal Eunho Kim1, Yasuhiko Shimotsuma1, Masaaki Sakakura2, Kiyotaka Miura1 1Dept. of Material Chemistry, Graduate School of Engineering, Kyoto Univ., Kyoto 615-8510, Japan 2Society-Academia 1.

Phys. Rev. B 93, 085128 (2016)

Photoionization of monocrystalline CVD diamond irradiated with ultrashort intense laser pulse Stefano Lagomarsino, Silvio Sciortino, Boyan Obreshkov, Tzveta Apostolova, Chiara Corsi, Marco Bellini, Eleni Berdermann, and Christian J. Schmidt Phys. Rev. B 93, 085128 – Published 22 February 2016

Atomistic Simulations of Ultrashort Pulsed Laser Ablation

The mechanisms of ultrashort pulsed laser ablation of polycrystalline diamond (PCD) are investigated by means of molecular dynamics simulations. The simulation model provides a detailed atomistic description of the laser energy deposition to the PCD specimen, which is verified by an experiment using 300 fs laser irradiation of a typical PCD sample.

Phys. Rev. B 97, 014310 (2018)

An idea of controlling hyperbolic dispersion of dielectric materials by an ultrashort laser pulse is proposed. Taking the diamond as a concrete example and using time-dependent density functional theory calculations, we show that the permittivity tensor of the material can be effectively tuned by an ultrashort laser pulse, serving as a transient hyperbolic medium with wide working frequency

Diamond slicing using ultrashort laser

2019/6/1Diamond slicing using ultrashort laser-induced graphitization and additional nanosecond laser illumination Author links open overlay panel Haruna Hirai a Hirofumi Hidai a Souta Matsusaka a Akira Chiba a Yoshiaki Mokuno b Makoto Yamaguchi c Noboru Morita a

Optical properties of femtosecond laser

Abstract A laser-induced periodic surface structure (LIPSS) has been fabricated on polycrystalline diamond by an ultrashort Ti:Sapphire pulsed laser source (k = 800 nm, P = 3 mJ, 100 fs) in a high vacuum chamber (10-7 mbar) in order to increase diamond

(PDF) Nonthermal graphitization of diamond induced

Inside the diamond, the electrons from tungsten will further lose their energy into the ma- FIG. 7 :7Schematic picture of the multilayer tungsten-diamond structure, irradiated with a laser pulse; the violet lines represent photons (hv), the red arrows stand for

Laser

View program details for SPIE Laser Damage conference on Laser-induced Damage in Optical Materials 2019 Monday, 23 September 2019 8:00 AM - 8:30 AM Location: Centennial Ballroom Award Winners for Laser Damage 2018 The Alexander Glass Best Oral Presentation Award 1st Place Best Oral Presentation Revisiting of the laser induced filamentation damage conditions in fused silica for energetic laser

Phys. Rev. B 93, 085128 (2016)

Photoionization of monocrystalline CVD diamond irradiated with ultrashort intense laser pulse Stefano Lagomarsino, Silvio Sciortino, Boyan Obreshkov, Tzveta Apostolova, Chiara Corsi, Marco Bellini, Eleni Berdermann, and Christian J. Schmidt Phys. Rev. B 93, 085128 – Published 22 February 2016

[PDF] An Investigation of Ultrashort Laser Pulse

This thesis reports observations of modification to single crystal CVD grown diamond irradiated with ultrashort (,150 fs), infrared (800 nm) laser pulses. The first set of experiments reports on modifications when the pulses were focused on the surface of single crystal diamond. A second set of experiments was done where pulses were fo cused in the bulk to study the formation of internal

(PDF) Nonthermal graphitization of diamond induced

Inside the diamond, the electrons from tungsten will further lose their energy into the ma- FIG. 7 :7Schematic picture of the multilayer tungsten-diamond structure, irradiated with a laser pulse; the violet lines represent photons (hv), the red arrows stand for

Design, optimization and manufacturing of

2020/10/1Diamond slicing using ultrashort laser-induced graphitization and additional nanosecond laser illumination Diam. Relat An innovative investigation on chip formation mechanisms in micro-milling using natural diamond and tungsten carbide tools J. Manuf, 31 ()

Diamond slicing using ultrashort laser

2019/6/1Diamond slicing using ultrashort laser-induced graphitization and additional nanosecond laser illumination Hirai, Morita, Noboru Abstract Publication: Diamond and Related Materials Pub Date: June 2019 DOI: 10.1016/j.diamond.2019.04.037 Bibcode: full text |

Effect of crystal orientation on picosecond

Bulk microstructuring of diamond crystals using ultrashort pulse lasers is based on local structural modifications re-sulting from laser-induced optical breakdown in the mate-rial. In laser-induced breakdown of diamond, the process of avalanche ionization was

Structural transformation of monocrystalline diamond

2016/11/1M. Shinoda, R.R. Gattass, E. MazurFemtosecond laser-induced formation of nanometer-width grooves on synthetic single-crystal diamond surfaces J. Appl. Phys, 105 (2009), p. 053102 CrossRef View Record in Scopus Google Scholar

Transient non

2021/1/3Diamond crystal model with a cubic lattice containing eight carbon atoms and lattice parameter of 6.74 a.u. is employed for our calculation under the periodic boundary condition. Figure 1 shows the calculated induced currents along [100] for single-cycle ultrashort field wavelengths vary within the range of 300–800 nm, all have intensities of (10^{15}) W/cm (^2).

Phys. Rev. B 97, 014310 (2018)

An idea of controlling hyperbolic dispersion of dielectric materials by an ultrashort laser pulse is proposed. Taking the diamond as a concrete example and using time-dependent density functional theory calculations, we show that the permittivity tensor of the material can be effectively tuned by an ultrashort laser pulse, serving as a transient hyperbolic medium with wide working frequency

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