Search Results - "Yatsui, Takashi"
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Recent improvement of silicon absorption in opto-electric devices
Published in Opto-Electronic Advances (01-01-2019)“…Silicon dominates the contemporary electronic industry. However, being an indirect band-gap material, it is a poor absorber of light, which decreases the…”
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Magnetometer with nitrogen-vacancy center in a bulk diamond for detecting magnetic nanoparticles in biomedical applications
Published in Scientific reports (12-02-2020)“…We developed a novel magnetometer that employs negatively charged nitrogen-vacancy (NV − ) centers in diamond, to detect the magnetic field generated by…”
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3
Synthesis of silver nanostructure on gold nanoparticle using near field assisted second harmonic generation
Published in Scientific reports (11-03-2021)“…By using gold (Au) nanoparticles (NPs) as an optical near-field source under far-field illumination in combination with a silver (Ag) ion solution containing a…”
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Design of an ultra-sensitive and miniaturized diamond NV magnetometer based on a nanocavity structure
Published in Japanese Journal of Applied Physics (01-08-2022)“…Abstract The ensemble of nitrogen-vacancy (NV) centers in diamond allows for the potential realization of the sensitive magnetometers by leveraging their…”
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High‐Q and Tailorable Fano Resonances in a One‐Dimensional Metal‐Optical Tamm State Structure: From a Narrowband Perfect Absorber to a Narrowband Perfect Reflector
Published in Advanced functional materials (01-06-2021)“…Fano resonances giving rise to a rich variety of asymmetric spectral shapes have been investigated in optical nanostructures with multidimensional…”
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6
Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography
Published in Applied physics letters (11-05-2015)“…An electric field gradient is an inherent property of the optical near-field (ONF). We investigated its effect on electron excitation in a quantum dot via…”
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7
Angstrom-scale flatness using selective nanoscale etching
Published in Beilstein journal of nanotechnology (18-10-2017)“…The realization of flat surfaces on the angstrom scale is required in advanced devices to avoid loss due to carrier (electron and/or photon) scattering. In…”
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Transfer-printing-based integration of silicon nitride grating structure on single-crystal diamond toward sensitive magnetometers
Published in Applied physics letters (17-10-2022)“…Negatively charged nitrogen-vacancy (NV) centers in diamond have emerged as promising candidates for a wide range of quantum applications, especially quantum…”
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9
Rapid virus detection using magnetic second harmonics of superparamagnetic iron oxide nanoparticles
Published in AIP advances (01-02-2023)“…Virus detection methods based on nonlinear magnetic response of magnetic nanoparticles have been investigated, and magnetic detection methods using the third…”
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10
Observing the localization of light in space and time by ultrafast second-harmonic microscopy
Published in Nature photonics (01-05-2012)“…Multiple coherent scattering and the constructive interference of certain scattering paths form the common scheme of several remarkable localization phenomena…”
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11
Dressed-photon–phonon (DPP)-assisted visible- and infrared-light water splitting
Published in Scientific reports (02-04-2014)“…A dressed-phonon–phonon (DPP) assisted photocatalyst reaction was carried out to increase the visible light responsibility, where the photon energy of the…”
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12
Coupling of Er light emissions to plasmon modes on In2O3: Sn nanoparticle sheets in the near-infrared range
Published in Applied physics letters (28-07-2014)“…Near-infrared Er photoluminescence (PL) is markedly modified using a plasmonic In2O3: Sn nanoparticle (NP) sheet. Modeling and optical measurements reveal the…”
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13
CO2 phonon mode renormalization using phonon-assisted energy up-conversion
Published in Scientific reports (26-11-2013)“…Molecular dissociation under incident light whose energy is lower than the bond dissociation energy has been achieved through multi step excitation using a…”
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14
Virus Detection using Second Harmonics of Magnetic Nanoparticles
Published in IEEJ transactions on electrical and electronic engineering (01-08-2022)“…Virus detection methods based on the nonlinear magnetic response of magnetic nanoparticles have been investigated, and magnetic detection methods using the…”
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15
Amplification by stimulated emission of nitrogen-vacancy centres in a diamond-loaded fibre cavity
Published in Nanophotonics (Berlin, Germany) (01-11-2020)“…Laser threshold magnetometry using the negatively charged nitrogen-vacancy (NV ) centre in diamond as a gain medium has been proposed as a technique to…”
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16
Nanophotonic switch using ZnO nanorod double-quantum-well structures
Published in Applied physics letters (28-05-2007)“…The authors report on time-resolved near-field spectroscopy of Zn O ∕ Zn Mg O nanorod double-quantum-well structures (DQWs) for a nanometer-scale photonic…”
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17
Optically controlled magnetic-field etching on the nano-scale
Published in Light, science & applications (01-03-2016)“…Electric and magnetic fields play an important role in both chemical and physical reactions. However, since the coupling efficiency between magnetic fields and…”
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18
Production of size-controlled Si nanocrystals using self-organized optical near-field chemical etching
Published in Applied physics letters (27-07-2009)“…We demonstrate the selective photochemical etching of Si in a self-organized manner, which strongly depends on the distribution of the optical near field. This…”
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19
Surface improvement of organic photoresists using a near-field-dependent etching method
Published in Beilstein journal of nanotechnology (05-04-2017)“…Surface flattening techniques are extremely important for the development of future electrical and/or optical devices because carrier-scattering losses due to…”
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20
Near-field-assisted localization: effect of size and filling factor of randomly distributed zinc oxide nanoneedles on multiple scattering and localization of light
Published in Applied physics. B, Lasers and optics (01-07-2016)“…We investigate the influence of the diameter and the filling factor of randomly arranged ZnO nanoneedles on the multiple scattering and localization of light…”
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