Three-dimensional laser writing in diamond bulk

Kononenko, T. V.; Konov, V. I.; Pimenov, S.M.; Rossukanyi, N.M.; Rukovishnikov, A.I.; Romano, Valerio

doi:10.1016/j.diamond.2010.12.013

Cited by 50 publications

(44 citation statements)

References 23 publications

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“…Nothing of the kind was found for the structures with a smaller number of layers. It is known that laser-induced phase transition in diamond bulk leads to the material density reduction, which generates intensive tensile stresses in the surrounding diamond and provokes its cracking around compact graphitized regions (e.g., pillars) of large cross-section [14]. One can see now that the same phenomenon is observed for large matrixes of the graphitized wires too.…”

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confidence: 74%

“…The average diameter of the graphitized wires (d w ∼ 1.8 μm) was approximately two times smaller than the period of the photonic structures. According to our experience [14], a larger diameter-to-period ratio (d w ∕Λ > 0.5) provokes stochastic breaking of the wires.…”

mentioning

confidence: 94%

“…First, 2D photonic crystal made in monocrystalline diamond using the laser writing technique was designed for THz radiation and consisted of straight graphitized wires with a diameter of 25 μm [13]. Later experiments [14] have shown that the wire diameter can be reduced down to 1 μm, and complex three-dimensional figures can be written deep inside diamond applying tight beam focusing and optimizing the processing parameters. Hence, shorter wavelengths down to a few micrometers can be controlled with diamond-based photonic structures.…”

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confidence: 99%

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Diamond photonic crystals for the IR spectral range

2014

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2D photonic crystals formed inside monocrystalline diamond to operate in the IR spectral range are reported. The photonic structures consisting of 150-μm-long graphitized wires arranged in a square matrix with a period of 4 μm were produced by laser writing with ultrashort pulses. Transmittance spectra (λ=1-14 μm) measured for the structures with increasing thickness demonstrate the occurrence of few minima being different for TM and TE polarization modes. Complex refraction index of the laser-modified material was evaluated for the first time in order to be used in computer simulation of the structures.

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confidence: 74%

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confidence: 94%

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confidence: 99%

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Diamond photonic crystals for the IR spectral range

2014

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“…11.13 Fragment of a laser-produced graphitic hexagonal chain. Reprinted from [37] with permission from Elsevier into the diamond. The free electron excited by a ω = 1.55 eV photon accelerates up to ∼10 8 cm s −1 .…”

Section: Allotropic Transformation In Diamondmentioning

confidence: 98%

Fs Laser Induced Reversible and Irreversible Processes in Transparent Bulk Material

Кононенко

Konov

2014

Fundamentals of Laser-Assisted Micro- And Nanotechnologies

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Laser-induced bulk modification of initially transparent solids is currently one of the hot topics in laser-matter interaction studies. The realization of these effects requires the application of focused intense beams of ultrashort pulsed (pulse durations <1 ps) lasers and the non-linear absorbtion of light in the focal volume. This chapter will describe various types of irreversible (permanent) changes inside amorphous and crystalline materials induced by sequences of fs laser pulses. To understand the mechanisms of fast material transformations, investigations of transient processes in the laser activated zone are strongly needed. The pump-probe optical technique combined with high temporal (fs) and spatial (um) resolution allows a better understanding of the problem. We shall focus on a number of transient phenomena: non-linear material optical response (Kerr effect), beam self-focusing, interband transitions and material ionization, carriers, and heat relaxation.

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“…The other ordinate solid form of carbon, the graphite, thanks to its high electrical conductivity (~1.3×10 3 S/cm) is suitable for the realization of bulk conductors even if good performances have been demonstrated in the form of thin layer for the fabrication also of conductive strips, array and pads in alternative to metallization [4,5] and for buried contacts in 3D detector architectures [6,7]. The fabrication of amorphous or nano-graphite pillars and micro-channels inside the bulk diamond volume has been already introduced together with the electrical characteristics using different graphitization approaches [8][9][10], although only laser writing with ultra-short pulses allows local graphitization of the diamond bulk at any depth and along arbitrary 3D trajectory [8,11]. Nevertheless, power density control, graphitization rate and aspect ratio are very critical items to avoid mechanical cracks along the graphite/diamond interface where electronic active defects, with strong charge carrier recombination capability, could be generated by thermal stress and volume expansion.…”

Section: Introductionmentioning

confidence: 99%