Search Results - "OKAMOTO, Hiromi"

Circular Dichroism Microscopy Free from Commingling Linear Dichroism via Discretely Modulated Circular Polarization by Narushima, Tetsuya, Okamoto, Hiromi

“…In this work, we developed a circular dichroism (CD) imaging microscope with a device to suppress the commingling of linear birefringence (LB) and linear…”
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Local Optical Activity in Achiral Two-Dimensional Gold Nanostructures by Hashiyada, Shun, Narushima, Tetsuya, Okamoto, Hiromi

“…Since Pasteur’s discovery of molecular chirality, which means that the molecule has a nonsuperposable mirror image, the geometrical chirality of a material has…”
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Strong Nanoscale Optical Activity Localized in Two-Dimensional Chiral Metal Nanostructures by Narushima, Tetsuya, Okamoto, Hiromi

“…Nanostructures with chiral shapes behave like chiral molecules and show optical activity. The optical activity of the chiral nanostructure should be given…”
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Observation and Modeling of External Rotating-Field-Driven Nonlinear Resonances in a Penning Trap by Higaki, Hiroyuki, Kojima, Kunihiro, Okamoto, Hiromi, Yoshinaga, Hinako

“…About 105 He+ ions are confined in a multi-ring Penning trap with an additional rotating electric dipole field introduced to enhance the ion density. Dangerous…”
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Near-Field Nonlinear CD Imaging of Single Gold Nanostructures by Nishiyama, Yoshio, Okamoto, Hiromi

“…We demonstrate near-field nonlinear circular dichroism (CD) imaging of single rectangular (achiral) gold nanostructures using a two-photon excitation method…”
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Circularly Polarized Photoluminescence from Achiral Dye Molecules Induced by Plasmonic Two-Dimensional Chiral Nanostructures by Le, Khai Q, Hashiyada, Shun, Kondo, Masaharu, Okamoto, Hiromi

“…We report strong dissymmetry between left- and right-handed circularly polarized photoluminescence (PL) enhancement induced by 2D chiral gold nanostructures,…”
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Visualizing the Optical Field Structures in Metal Nanostructures by Okamoto, Hiromi, Imura, Kohei

“…Noble metal nanostructures yield confined optical fields on a nanometer scale due to plasmon resonances, and they have potentially novel applications in…”
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Nanooptical Studies on Physical and Chemical Characteristics of Noble Metal Nanostructures by Okamoto, Hiromi

“…Studies on physical and chemical properties of noble metal nanostructures, mainly by near-field optical microscopy and spectroscopy, are described. Near-field…”
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Experimental Demonstration of Nonlinear Resonances in a Linear Paul Trap by Goto, Masato, Ito, Kiyokazu, Kojima, Kunihiro, Okamoto, Hiromi

“…A variety of resonances have been observed experimentally in a linear Paul trap. They are excited by weak nonlinear fields that exist within the trap aperture…”
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Plasmon Dephasing in Single Gold Nanorods Observed By Ultrafast Time-Resolved Near-Field Optical Microscopy by Nishiyama, Yoshio, Imaeda, Keisuke, Imura, Kohei, Okamoto, Hiromi

“…We applied time-resolved near-field optical microscopic measurements with ultrashort light pulses of ∼16 fs duration to observe plasmon dephasing processes in…”
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Supramolecular Chirality Synchronization in Thin Films of Plasmonic Nanocomposites by Szustakiewicz, Piotr, Kowalska, Natalia, Grzelak, Dorota, Narushima, Tetsuya, Góra, Monika, Bagiński, Maciej, Pociecha, Damian, Okamoto, Hiromi, Liz-Marzán, Luis M, Lewandowski, Wiktor

“…Mirror symmetry breaking in materials is a fascinating phenomenon that has practical implications for various optoelectronic technologies. Chiral plasmonic…”
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Observation of Plasmon Wave Packet Motions via Femtosecond Time-Resolved Near-Field Imaging Techniques by Nishiyama, Yoshio, Imura, Kohei, Okamoto, Hiromi

“…The generation and dynamics of plasmon wave packets in single gold nanorods were observed at a spatiotemporal scale of 100 nm and 10 fs via time-resolved…”
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Synthesis of Chiral Labtb and Visualization of Its Enantiomeric Excess by Induced Circular Dichroism Imaging by Yamada, Teppei, Eguchi, Toshiki, Wakiyama, Taro, Narushima, Tetsuya, Okamoto, Hiromi, Kimizuka, Nobuo

“…Crystalline particles of a microporous, robust, and chiral metal–organic framework (MOF) were synthesized and their enantiomer excess (ee) was visualized for…”
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Directional Supramolecular Polymerization in a Dynamic Microsolution: A Linearly Moving Polymer’s End Striking Monomers by Matoba, Shota, Kanzaki, Chisako, Yamashita, Kae, Kusukawa, Takahiro, Fukuhara, Gaku, Okada, Tetsuo, Narushima, Tetsuya, Okamoto, Hiromi, Numata, Munenori

“…Although directional chain reactions are common in nature’s self-assembly processes and in covalent polymerizations, it has been challenging to perform such…”
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Near-Field Two-Photon-Induced Photoluminescence from Single Gold Nanorods and Imaging of Plasmon Modes by Imura, Kohei, Nagahara, Tetsuhiko, Okamoto, Hiromi

“…We investigated the two-photon-induced photoluminescence properties of single gold nanorods by scanning near-field spectroscopy. The process was found to be…”
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Properties of Photoluminescence from Single Gold Nanorods Induced by Near-Field Two-Photon Excitation by Imura, Kohei, Okamoto, Hiromi

“…We investigated properties of photoluminescence from single gold nanorods induced by near-field two-photon excitation, using scanning near-field optical…”
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Novel tabletop experiment demonstrating the nonlinear resonance excitation observed at the CERN Proton Synchrotron by Ikeda, Takashi, Ito, Kiyokazu, Okamoto, Hiromi

“…A compact Paul ion trap is employed to replicate the dynamic behavior of a relativistic charged-particle beam traveling in a large-scale accelerator. The…”
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Roles of Superchirality and Interference in Chiral Plasmonic Biodetection by Gilroy, Cameron, Hashiyada, Shun, Endo, Kensaku, Karimullah, Affar S, Barron, Laurence D, Okamoto, Hiromi, Togawa, Yoshihiko, Kadodwala, Malcolm

“…Chiral plasmonic nanostructures enable ≤pg detection and characterization of biomaterials. The sensing capabilities are associated with the chiral asymmetry of…”
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Linear Momentum of a Microfluid Realizes an Anisotropic Reaction at the Ends of a Supramolecular Nanofiber by Kanzaki, Chisako, Matoba, Shota, Inagawa, Arinori, Fukuhara, Gaku, Okada, Tetsuo, Narushima, Tetsuya, Okamoto, Hiromi, Numata, Munenori

“…The anisotropic properties of one-dimensional (1D) supramolecules have generally been the sole way to input molecular information along a structure of high…”
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Visualization of Localized Intense Optical Fields in Single Gold−Nanoparticle Assemblies and Ultrasensitive Raman Active Sites by Imura, Kohei, Okamoto, Hiromi, Hossain, Mohammad K, Kitajima, Masahiro

“…We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using…”
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