Single shot deposition of nanodot array by laser-induced forward transfer using interference pattern

2021 ◽  
Author(s):  
Yoshiki Nakata ◽  
Eiki Hayashi ◽  
Koji Tsubakimoto ◽  
Hiroyuki Shiraga ◽  
Aiko Narazaki ◽  
...  
Keyword(s):  
Interference Pattern ◽  
Single Shot ◽  
Nanodot Array ◽  
Forward Transfer

scholarly journals Nanodot array deposition via single shot laser interference pattern using laser-induced forward transfer

2020 ◽  
Vol 2 (2) ◽  
pp. 025101 ◽  
Author(s):  
Yoshiki Nakata ◽  
Eiki Hayashi ◽  
Koji Tsubakimoto ◽  
Noriaki Miyanaga ◽  
Aiko Narazaki ◽  
...  
Keyword(s):  
Interference Pattern ◽  
Single Shot ◽  
Laser Interference ◽  
Nanodot Array ◽  
Forward Transfer

Micro-Deposition of the Film Material Using Femtosecond Laser Pulse

2012 ◽  
Vol 229-231 ◽  
pp. 109-112
Author(s):  
Yang Li ◽  
Ping Ping Sun ◽  
Ai Qing Wu
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Quartz Substrate ◽  
Aluminum Film ◽  
Single Shot ◽  
Film Material ◽  
Central Wavelength ◽  
Atomic Force ◽  
Forward Transfer ◽  
Micro Patterns

The femtosecond laser-induced forward transfer of the aluminum film had been studied experimentally by single-shot laser pulse (pulse duration 148fs, central wavelength 775nm). With the help of the atomic force microscope and scanning electron microscope, the dependence of morphology and dimension of deposited dots on irradiated laser pulse energy were investigated. It was revealed the threshold fluence for transfer was ~6.3 J/cm2 for the aluminum thin film with a thickness of ~500 nm. It also was presented the micro patterns of the aluminum film on a quartz substrate fabricated using the femtosecond laser-induced forward transfer .

scholarly journals Laser-Induced Transfer of Noble Metal Nanodots with Femtosecond Laser-Interference Processing

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 305
Author(s):  
Yoshiki Nakata ◽  
Koji Tsubakimoto ◽  
Noriaki Miyanaga ◽  
Aiko Narazaki ◽  
Tatsuya Shoji ◽  
...  
Keyword(s):  
Thin Film ◽  
Femtosecond Laser ◽  
Noble Metal ◽  
Processing Technique ◽  
Femtosecond Laser Irradiation ◽  
Single Shot ◽  
Forward Transfer ◽  
Highly Sensitive Detection ◽  
Solid Liquid ◽  
Au Nanodots

Noble metal nanodots have been applied to plasmonic devices, catalysts, and highly sensitive detection in bioinstruments. We have been studying the fabrications of them through a laser-induced dot transfer (LIDT) technique, a type of laser-induced forward transfer (LIFT), in which nanodots several hundred nm in diameter are produced via a solid–liquid–solid (SLS) mechanism. In the previous study, an interference laser processing technique was applied to LIDT, and aligned Au nanodots were successfully deposited onto an acceptor substrate in a single shot of femtosecond laser irradiation. In the present experiment, Pt thin film was applied to this technique, and the deposited nanodots were measured by scanning electron microscopy (SEM) and compared with the Au nanodots. A typical nanodot had a roundness fr=0.98 and circularity fcirc=0.90. Compared to the previous experiment using Au thin film, the size distribution was more diffuse, and it was difficult to see the periodic alignment of the nanodots in the parameter range of this experiment. This method is promising as a method for producing large quantities of Pt particles with diameters of several hundred nm.

Characterization of axially tilted fibres utilizing a single-shot interference pattern

2017 ◽  
Vol 91 ◽  
pp. 144-150 ◽  
Author(s):  
T.Z.N. Sokkar ◽  
K.A. El – Farahaty ◽  
M.A. El – Bakary ◽  
E.Z. Omar ◽  
M. Agour
Keyword(s):  
Interference Pattern ◽  
Single Shot

Computer analysis of side-band holography in STEM

1991 ◽  
Vol 49 ◽  
pp. 684-685
Author(s):  
M.A. Gribelyuk ◽  
J.M. Cowley
Keyword(s):  
Interference Pattern ◽  
Computer Analysis ◽  
Side Band ◽  
Diffraction Plane ◽  
Illumination System ◽  
Probe Size

Recently the use of a biprism in a STEM instrument has been suggested for recording of a hologram. A biprism is inserted in the illumination system and creates two coherent focussed beams at the specimen level with a probe size d= 5-10Å. If one beam passes through an object and another one passes in vacuum, an interference pattern, i.e. a hologram can be observed in diffraction plane (Fig.1).

Functional stereotactic radiosurgery involving a dedicated linear accelerator and gamma unit: a comparison study

2004 ◽  
pp. 373-380 ◽  
Author(s):  
Timothy D. Solberg ◽  
Steven J. Goetsch ◽  
Michael T. Selch ◽  
William Melega ◽  
Goran Lacan ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Linear Accelerator ◽  
Treatment Plan ◽  
Single Shot ◽  
Submillimeter Range ◽  
Primate Model ◽  
Content Type ◽  
Stereotactic Frame ◽  
Targeting Ability ◽  
Fine Print

Object. The purpose of this work was to investigate the targeting and dosimetric characteristics of a linear accelerator (LINAC) system dedicated for stereotactic radiosurgery compared with those of a commercial gamma knife (GK) unit. Methods. A phantom was rigidly affixed within a Leksell stereotactic frame and axial computerized tomography scans were obtained using an appropriate stereotactic localization device. Treatment plans were performed, film was inserted into a recessed area, and the phantom was positioned and treated according to each treatment plan. In the case of the LINAC system, four 140° arcs, spanning ± 60° of couch rotation, were used. In the case of the GK unit, all 201 sources were left unplugged. Radiation was delivered using 3- and 8-mm LINAC collimators and 4- and 8-mm collimators of the GK unit. Targeting ability was investigated independently on the dedicated LINAC by using a primate model. Measured 50% spot widths for multisource, single-shot radiation exceeded nominal values in all cases by 38 to 70% for the GK unit and 11 to 33% for the LINAC system. Measured offsets were indicative of submillimeter targeting precision on both devices. In primate studies, the appearance of an magnetic resonance imaging—enhancing lesion coincided with the intended target. Conclusions. Radiosurgery performed using the 3-mm collimator of the dedicated LINAC exhibited characteristics that compared favorably with those of a dedicated GK unit. Overall targeting accuracy in the submillimeter range can be achieved, and dose distributions with sharp falloff can be expected for both devices.

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