Features of Field Emission and Formation of Electron Beam in a Multi-Electrode Planar Cathode

Yakunin, A. N.; Aban'shin, N. P.; Mosiyash, D. S.; Avetisyan, Yu. A.; Akchurin, Garif G.

doi:10.1109/apede.2018.8542332

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…The results of our experimental study showed a durability of 8700 h with an average emission current density of at least 100 mA/cm 2 . Additionally, high photosensitivity of the structure in a wide wavelength range was found in our experiments [16][17][18].…”

Section: Introductionsupporting

confidence: 73%

“…This differs them from most of the works [ 20 , 21 , 22 ] devoted to the problems of solar energy conversion or catalysis. The motivation for the work was previous encouraging results [ 25 , 26 ], as well as our experimental data [ 14 , 15 , 16 , 17 , 18 , 27 , 28 ] on tunneling emission of hot electrons from metal (Mo) and composite structures such as a “metal–DLC (α-C) film” in a vacuum under conditions of combined exposure to a strong electrostatic field and laser radiation. It was found that irradiation of interdigital structures such as the “metal–DLC film” of a vacuum microcathode with CW laser radiation of milliwatt power at discrete wavelengths from 405 to 1550 nm produced a tunnel photocurrent [ 27 ], which linearly depended on the light intensity.…”

Section: Features Of the Processes Of Tunnel Photoemission Into Vamentioning

confidence: 99%

“…Perhaps the most interesting thing for us is the possibility of hot electrons to activate the photoemission of electrons from a metal surface into a vacuum. It is these issues of effective generation of hot electrons for the activation of blade-type photoemission structures in a strong electrostatic field to which our theoretical and experimental studies were devoted [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Modeling of Laser-Induced Plasmon Effects in GNS-DLC-Based Material for Application in X-ray Source Array Sensors

Yakunin

Zarkov

Avetisyan

et al. 2021

Sensors

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An important direction in the development of X-ray computed tomography sensors in systems with increased scanning speed and spatial resolution is the creation of an array of miniature current sources. In this paper, we describe a new material based on gold nanostars (GNS) embedded in nanoscale diamond-like carbon (DLC) films (thickness of 20 nm) for constructing a pixel current source with photoinduced electron emission. The effect of localized surface plasmon resonance in GNS on optical properties in the wavelength range from UV to near IR, peculiarities of localization of field and thermal sources, generation of high-energy hot electrons, and mechanisms of their transportation in vacuum are investigated. The advantages of the proposed material and the prospects for using X-ray computed tomography in the matrix source are evaluated.

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Section: Introductionsupporting

confidence: 73%

Section: Features Of the Processes Of Tunnel Photoemission Into Vamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of Laser-Induced Plasmon Effects in GNS-DLC-Based Material for Application in X-ray Source Array Sensors

Yakunin

Zarkov

Avetisyan

et al. 2021

Sensors

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“…To make the influence of the potential Ua on the additional control electrode significant, it is necessary to ensure a relatively small gap between the electrode and the plane of the emitter. There is experience in manufacturing the structures of the given type [27,28]. To make it clear, let us set the gap at 5 nm when simulating a transformed electrostatic field.…”

Section: Appl Sci 2019 9 X For Peer Review 9 Of 16mentioning

confidence: 99%

A Visible and Near-IR Tunnel Photosensor with a Nanoscale Metal Emitter: The Effect of Matching of Hot Electrons Localization Zones and a Strong Electrostatic Field

et al. 2019

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The results of the research and design of a novel vacuum photosensor with a planar molybdenum blade structure are presented. The advanced prototype implements the principle of an increasing penetrability of the Schottky barrier for the metal–vacuum interfaces under the action of an external strong electrostatic field. Theoretical and experimental substantiation of the photosensor performance in a wide range of wavelengths (from 430 to 680 nm and from 800 to 1064 nm) beyond the threshold of the classical photoelectric effect is given. The finite element method was applied to calculate distribution of the optical and electrostatic fields inside the photosensor structure. The sensor current-to-light response was studied using the periodic pulsed irradiation with the tunable wavelength. It was shown that the nanoscale localization zones of two types are formed near the surface of the blade tip: the zone of an increased concentration of hot electrons localized inside the molybdenum blade, and the zone with an increased strength of the external electrostatic field localized outside the blade. In general, the mutual positions of these zones may not coincide, whereas the position of the first-type localization zone significantly varies with the changes in the wavelength of the irradiating light. This causes features in the spectrum of the quantum yield of the photosensor such as expressed non-monotonic behavior and occurrence of sharp dips. The design of the photosensor that provides matching of the positions for both types of localization zones was proposed; the manufactured prototypes of the designed device were experimentally studied. In the designed photosensor, the ballistic transport of photoelectrons in the vacuum gap with a strong field provides a possibility for the creation of ultra-fast optoelectronic devices, such as modulators, detectors, and generators.

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Features of Field Emission and Formation of Electron Beam in a Multi-Electrode Planar Cathode

Cited by 2 publications

References 2 publications

Modeling of Laser-Induced Plasmon Effects in GNS-DLC-Based Material for Application in X-ray Source Array Sensors

Modeling of Laser-Induced Plasmon Effects in GNS-DLC-Based Material for Application in X-ray Source Array Sensors

A Visible and Near-IR Tunnel Photosensor with a Nanoscale Metal Emitter: The Effect of Matching of Hot Electrons Localization Zones and a Strong Electrostatic Field

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