Photoassisted and multiphoton emission from single-crystal diamond needles

Borz, Mario; Martin-Drumel, Marie-Aline; Blum, Ivan; Houard, Jonathan; Costa, G. Da; Delaroche, Fabien; Idlahcen, Saïd; Haboucha, Adil; Hideur, Ammar; Kleshch, Victor I.; Obraztsov, A. N.; Vella, A.

doi:10.1039/c9nr01001g

Cited by 18 publications

(19 citation statements)

References 34 publications

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“…Detailed description of the fabrication processes, shape and structural parameters of the diamond needles can be found elsewhere [22,23]. Individual diamond needles were fixed on a tungsten support tip either by conductive glue using a micromanipulator under an optical microscope or using ion beam induced deposition of platinum in a focused ion beam apparatus [20]. Typical TEM images obtained for one of the samples analyzed in this work are displayed in figure 1.…”

Section: Experimental Setup Samplesmentioning

confidence: 99%

“…The number of impacts per image corresponds to the current detected and was determined a posteriori. More details on the set-up and current measurements are available in [20].…”

Section: Electron Emission Measurementmentioning

confidence: 99%

“…The pulse duration of 700 fs was measured by an autocorrelator at the laser output just after the AOM. More details on our home-made laser operation are reported elsewhere [20]. The laser beam has been focused on the diamond nano-needle through a set of mirrors and lenses, as shown in figure 2.…”

Section: Laser Illuminationmentioning

confidence: 99%

“…In particular, the diamond received a lot of attention due to its unique properties: chemical inertness, mechanical stability and high thermal conductivity [16,17]. In this sense, recent studies have demonstrated that diamond is an excellent candidate for field-emission cathode, in the dark or under ultrafast laser illumination [12,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Under femtosecond (fs) laser illumination, the electrons can be photo-excited because multi-photon excitation becomes efficient. In the case of single-crystal nano-needles, the photo-excitation remains the dominant cause of electron emission at both low and high repetition rate of the laser, due to the high thermal conductivity of the diamond [20,21]. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.…”

Section: Introductionmentioning

confidence: 99%

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Field emission microscopy pattern of a single-crystal diamond needle under ultrafast laser illumination

et al. 2019

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We report herein on the spatial beam properties of a field emission electron source based on a singlecrystal diamond needle illuminated by ultrashort light pulses. We show that the increasing of the laser intensity strongly modifies the emission pattern, leading to the emergence of a new emission region at high peak power. This region is situated on the opposite side of the diamond needle to the one irradiated by the laser. By spatially-resolved energy spectrometry, we prove that the electrons emitted from this region are governed by a multi-photon absorption process. The occurrence of this emission pattern can be explained by accounting for the inhomogeneous distribution of the optical field enhancement and the laser absorption induced by light diffraction within the nanometric needle. The numerical simulations performed on a real sub-wavelength tip confirm this localization of the optical field enhancement and reveal that the electrons trajectories match the spatial beam distribution evidenced experimentally. This work underlines the need to closely monitor the surface roughness of the field emitter as well as the laser illumination conditions to finely control its emission pattern.

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Section: Experimental Setup Samplesmentioning

confidence: 99%

“…The number of impacts per image corresponds to the current detected and was determined a posteriori. More details on the set-up and current measurements are available in [20].…”

Section: Electron Emission Measurementmentioning

confidence: 99%

Section: Laser Illuminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Field emission microscopy pattern of a single-crystal diamond needle under ultrafast laser illumination

et al. 2019

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Diamond Nanostructures at Different Dimensions: Synthesis and Applications

Li,

Yang,

Jiang

et al. 2024

Adv Funct Materials

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Diamond materials at different nanoscales provide them various characteristics such as elastic mechanical properties in needle‐like nanotips, flexibility of 2D films having atomic thicknesses and constant hardness under high pressures, superior field electron emission properties of vertically wall‐like composites, unprecedented hardness and improved toughness of nanotwin diamond (nt‐diamond), while the inherent excellent properties of bulk diamond (e.g., high Young's modulus, robustness, biocompatibility) can be maintained. In this paper, the newly born 1D diamond nanothreads, 2D diamanes, as well as 3D nt‐diamond are briefly reviewed. The innovations, progresses and achievements of different dimensional diamond nanostructures, covering lines, planes and volumes are overviewed. The topical problems and future outlooks of diamond nanostructures are outlined and discussed.

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All-carbon heterostructures self-assembly during field electron emission from diamond nanotip

Kleshch,

Orekhov,

Pishchulina

et al. 2024

Carbon

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Photoassisted and multiphoton emission from single-crystal diamond needles

Abstract: We report on photoassisted and multiphoton electron emission from single-crystal diamond needles and we explore their emission properties.

Cited by 18 publications

References 34 publications

Field emission microscopy pattern of a single-crystal diamond needle under ultrafast laser illumination

Field emission microscopy pattern of a single-crystal diamond needle under ultrafast laser illumination

Diamond Nanostructures at Different Dimensions: Synthesis and Applications

All-carbon heterostructures self-assembly during field electron emission from diamond nanotip

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