IWANAGA Masanobu

J-GLOBAL         Last updated: Jan 15, 2019 at 09:48
IWANAGA Masanobu
National Institute for Materials Science
Research funding number


Graduate School, Division of Human and Environmental Studies, Kyoto University
Faculty of Science, Kyoto University

Published Papers

Hiroyuki Kurosawa, Bongseok Choi, Masanobu Iwanaga
Nanoscale Research Letters   13(1)    Dec 2018   [Refereed]
This study focuses on the experimental and numerical investigations to establish the degradation characteristics of a metasurface polarizer. The metasurface has a stacked self-complementary structure that exhibits a high extinction ratio of the or...
Masanobu Iwanaga
Applied Sciences   8(8) 1328   Aug 2018   [Refereed]
All-dielectric metasurfaces are an emerging subfield in photonics. Light-wave manipulation has been extensively explored in these metasurfaces. Although light–matter interaction has been also investigated in these metasurfaces, only a limite...
Masanobu Iwanaga, Takaaki Mano, Naoki Ikeda
ACS Photonics   5(3) 897-906   Mar 2018   [Refereed]
Light--matter interaction exploiting plasmons is attracting great interest in terms of a new twist, hot electrons. We designed a basic configuration to couple plasmonic metasurfaces with a layer of quantum dots (QDs) embedded in semiconductors and...
Masanobu Iwanaga, Takaaki Mano, Naoki Ikeda
Applied Physics A   124(2)    Feb 2018   [Refereed]
We report the first experimental finding of nonlinear responses of photoluminescence (PL) intensity in coupling systems of plasmonic metasurface and InAs quantum dots (QDs) embedded in a GaAs substrate. We numerically design the coupling systems a...
Hiroyuki Kurosawa, Masanobu Iwanaga
RSC Advances   7(59) 37076-37085   Jul 2017   [Refereed]
We report efficient sensing platforms to obtain artificially enhanced optical signals from near-infrared fluorescent molecules with emitting wavelengths in 1.1 Texm range, which corresponds to the so-called living-body window. Prominent enhancem...
Masanobu Iwanaga
Applied Sciences   7(5) 458   Apr 2017   [Refereed]
Plasmonic materials are expanding their concept; in addition to noble metals that are good conductors even at optical frequencies and support surface plasmon polaritons at the interface, other metals and refractory materials are now being used as ...
Yoshimasa Sugimoto, Masanobu Iwanaga, Hideki T. Miyazaki
Micro-and Nanophotonic Technology, Wiley-VCH   269-289   Mar 2017
The fabrication and transmission characteristics of a large-area, SP-RGB color filter consisting of a periodic hole array on an Al thin film fabricated by ultra-violet-NIL. The fabrication of large-scale, Au-coated, stacked complementary plasmonic...
Hiroyuki Kurosawa, Bongseok Choi, Yoshimasa Sugimoto, Masanobu Iwanaga
Optics Express   25(4) 4446   Feb 2017   [Refereed]
High-performance ultrathin polarizers have been experimentally demonstrated employing stacked complementary (SC) metasurfaces, which were produced using nanoimprint lithography. It is experimentally determined that the metasurface polarizers compo...
Ultrathin Polarizers and Waveplates Made of Metamaterials
IWANAGA, Masanobu
Micro- and Nanophotonic Technologies   249-268   Jan 2017   [Refereed]
In this chapter, we address recent progress in light manipulations with metamaterials (MMs). At the early stage of MMs studies, novel phenomena such as artificial magnetism,, negative refractive index, super-resolution, etc attracted great interes...
Super-resolution lens array made of metamaterials
岩長 祐伸
光アライアンス   27(11) 6-9   Nov 2016
Bongseok Choi, Masanobu Iwanaga, Yoshimasa Sugimoto, Kazuaki Sakoda, Hideki T. Miyazaki
Nano Letters   16(8) 5191-5196   Aug 2016   [Refereed]
Lanthanoid series are unique in atomic elements: one reason is because they have 4f electronic states forbidding electric-dipole (ED) transitions in vacuum, and another is because they are very useful in current-day optical technologies such as la...
Masanobu Iwanaga, Bongseok Choi, Hideki T. Miyazaki, Yoshimasa Sugimoto
Nanoscale   8(21) 11099-11107   Apr 2016   [Refereed]
Plasmon-enhanced optical processes in molecules have been extensively but individually explored for Raman scattering, fluorescence, and infrared light absorption. In contrast to recent progress in interfacial control of hot electrons in plasmon--s...
Optical super-resolution imaging with hyperlens array
岩長 祐伸
応用物理   85(4) 290-295   Apr 2016   [Refereed]
Fabrication and Application of Light Emitting Optical Metasurfaces
宮崎 英樹, 岩長 祐伸
THE REVIEW OF LASER ENGINEERING   44(1) 10-14   Jan 2016   [Refereed]
Mold fabrication with nm precision employing UV nanoimprint lithography
岩長 祐伸
プラスチックス   66(12) 6-10   Dec 2015
Hideki T Miyazaki, Takeshi Kasaya, Hirotaka Oosato, Yoshimasa Sugimoto, Bongseok Choi, Masanobu Iwanaga, Kazuaki Sakoda
Science and Technology of Advanced Materials   16(3) 035005   Jun 2015   [Refereed]
パッケージングされ、メンブレン電熱ヒータと集積化された2波長メタ表面熱放射光源を、大量生産可能で低コストな紫外線ナノインプリントリソグラフィ法と可溶性紫外線レジストを用いた単層リフトオフ法にて作製した。さらにこの光源を赤外CO2濃度計測に実際に応用した。この平面型Au/Al2O3/Auメタ表面光源では、直交した長方形Auパッチが交互に配列され、CO2濃度計測に必要な波長4.26 umと3.95 umの赤外光がほぼ完全黒体放射され、その際の必要電力は、従来光源に比べて31%低減された。この結...
Bongseok Choi, Masanobu Iwanaga, Hideki T. Miyazaki, Yoshimasa Sugimoto, Akihiro Ohtake, Kazuaki Sakoda
Chemical Communications   51(57) 11470-11473   Jun 2015   [Refereed]
We have experimentally shown significant suppression of metal-induced fluorescence (FL) quenching on plasmo-photonic metasurfaces by incorporating self-assembled monolayer (SAM) of sub-nm thickness. The FL signals of rhodamine dye molecules have b...
Masanobu Iwanaga
Photonics   2(2) 468-482   May 2015   [Refereed]
Metamaterials (MMs) are subwavelength-structured materials rapidly developed in this century and have various potentials to realize novel phenomena such as negative refraction, cloaking, and super-resolution.Theoretical proposals for the super-res...
Masanobu Iwanaga, Bongseok Choi
Nano Letters   15(3) 1904-1910   Mar 2015   [Refereed]
We constructed plasmo-photonic crystals in which efficient light-trapping, plasmonic resonances couple with photonic guided resonances of large density of states and high-quality factor. We have numerically and experimentally shown that hetero-pla...
Masanobu Iwanaga, Bongseok Choi, Hideki T. Miyazaki, Yoshimasa Sugimoto, Kazuaki Sakoda
Journal of Nanomaterials   2015 1-7   Feb 2015   [Refereed]
We show an effective procedure for lateral structure tuning in nanoimprint lithography (NIL) that has been developed as a vertical top-down method fabricating large-area nanopatterns. The procedure was applied to optical resonance tuning in stacke...
Bongseok Choi, Masanobu Iwanaga, Tetsuyuki Ochiai, Hideki T. Miyazaki, Yoshimasa Sugimoto, Kazuaki Sakoda
Applied Physics Letters   105(20) 201106   Nov 2014   [Refereed]
We have produced nanoimprinted silicon-on-insulator (SOI) substrates with high precision and applied them for fluorescence (FL) enhancement of typical dye molecules of Rhodamine series. We experimentally found that the FL signals on the nanoimprin...
H. T. Miyazaki, T. Kasaya, M. Iwanaga, B. Choi, Y. Sugimoto, K. Sakoda
Applied Physics Letters   105(12) 121107   Sep 2014   [Refereed]
平面型MIM(金属/誘電体/金属)共振器をサブ波長配列し,CO2濃度計測に必要な波長4.27 umと3.95 umの赤外光だけを放射する赤外熱放射メタ表面を実現した.各辺が各波長に共鳴する長方形共振器を交互に90°向きを変えて配列し,さらに格子定数を各共振器の断面積に合わせて最適化することにより,偏光や入射角に依らず2波長で完全吸収(完全黒体放射)を示す構造を設計した.誘電体層をAl2O3,金属層をAuとし,電子線リソグラフィ,リフトオフにて作製したメタ表面が偏光に依らず目的の2波長でのみ...
Masanobu Iwanaga
Applied Physics Letters   105(5) 053112   Aug 2014   [Refereed]
Limit of resolution of conventional optical microscopes has never reached below 100 nm under visible light illumination. We show that numerically designed high-transmittance hyperlens array (HLA) is implemented in an optical microscope and works i...
Qinghui Shou, Koichiro Uto, Masanobu Iwanaga, Mitsuhiro Ebara, Takao Aoyagi
Polymer Journal   46(8) 492-498   Aug 2014   [Refereed]
We focus on gold nanorods which have high absorption of near infrared light and corresponding high efficiency of heat generation
Bongseok Choi, Masanobu Iwanaga, Hideki T. Miyazaki, Kazuaki Sakoda, Yoshimasa Sugimoto
Journal of Micro/Nanolithography, MEMS, and MOEMS   13(2) 023007   Apr 2014   [Refereed]
We fabricated large-area stacked complementary plasmonic crystals (SC PlCs) byemploying ultra violet nano-imprint lithography. The SC PlCs were made on silicon oninsulator substrates consisting of three layers: the top layer contacting air was ape...
Masanobu Iwanaga
Progress In Electromagnetics Research   132 129-148   Jan 2014   [Refereed]
Electromagnetic (EM) eigen modes in a fishnet metamaterial (MM) slab have comprehensively analyzed in an experimental configuration, based only on precise solutions of Maxwell equations. The EM eigen modes were directly detected from light-absorpt...
岩長 祐伸
研究開発リーダー   10(7) 27-29   Oct 2013
Masanobu Iwanaga
Science and Technology of Advanced Materials   13(5) 053002   Oct 2012   [Refereed]
A decade research on metamaterials (MMs) has yielded great progress in artificial electromagnetic materials over a wide frequency range from microwaves to optical frequencies. This review outlines the achievements in photonic MMs that are able to ...
Masanobu Iwanaga, Naoki Ikeda, Yoshimasa Sugimoto
Physical Review B   85(4)    Jan 2012   [Refereed]
We have experimentally and numerically examined resonant modes in plasmonic crystals (PlCs) of coaxial metallic nanostructures. Resonance enhancements of local electromagnetic (EM) fields were evaluated quantitatively. We clarified that a local mo...
Metamaterials in optical frequencies
岩長 祐伸, 宮崎 英樹, 杉本 喜正, 迫田 和彰
オプトロニクス   30(12) 59-62   Dec 2011
可視から近赤外の波長領域(光波領域)で働くメタマテリアルの開発では,次の2つの課題を考慮する必要がある。すなわち,波長よりも小さな単位構造を周期的に配列するための金属材料の加工技術の開発と,光波領域では無視できない金属の誘電損失を低減するデバイス構造の探索である。これらの観点から見ると,マイクロ波領域で数多くの作製例がある3次元メタマテリアルは,加工技術と誘電損失の両面で光波領域での実現はたいへんチャレンジングである。そこで我々は, 平成22年度から5年計画ではじまった文部科学省科学研究費...
岩長 祐伸
工業材料   60(1) 70-71   Dec 2011
岩長 祐伸
O plus E   33(12) 1322-1326   Nov 2011
Masanobu Iwanaga
Optics Letters   36(13) 2504   Jun 2011   [Refereed]
Eigenmodes in a typical perforated metal-insulator-metal waveguide structure have been analyzed. It is shown that the lowest eigenmode originates from a plasmonic waveguide mode between metallic layers and has net negative group velocity on the lo...
Masanobu Iwanaga
Physical Review B   82(15)    Oct 2010   [Refereed]
Electromagnetic eigenmodes in a stacked complementary plasmonic crystal slab have been experimentally detected at optical frequencies and numerically investigated in the dispersions and the resonant field distributions. In the stacked structure, l...
Masanobu Iwanaga
Optics Express   18(15) 15389   Jul 2010   [Refereed]
Resonant electromagnetic fields in stacked complementary plasmonic crystal slabs (sc-PlCSs) are numerically explored in subwavelength dimensions. It is found that the local plasmon resonances in the sc-PlCSs are composite states of locally enhance...
Jinsub Park, Yayo Yamazaki, Masanobu Iwanaga, Heonsu Jeon, Takumi Fujiwara, Takafumi Yao
Optics Express   18(8) 7851   Mar 2010   [Refereed]
We report on the second harmonic generation (SHG) in 2D periodically polarity-inverted (PPI) ZnO heterostructures. The grating structures with nanometer-scale periodicity are fabricated on (0001) Al2O3 substrates by using the in situ polarity inve...
Masanobu Iwanaga
Applied Physics Letters   96(8) 083106   Feb 2010   [Refereed]
It has been experimentally and numerically shown that transmission at near infraredwavelengths is selectively controlled by polarizations in two-dimensional complemen-tary plasmonic crystal slabs (2D c-PlCSs) of stacked unit cell. This feature is ...
Masanobu Iwanaga
Optics Letters   35(2) 109   Jan 2010   [Refereed]
Concrete design for orthogonal polarization rotator at optical frequencies is presented. The subwavelength rotator is formed from a pair of ultrathin metamaterial plates of transparency and remarkable anisotropy. By traveling through the rotator, ...
Masanobu Iwanaga
Journal of the Optical Society of America B   26(5) 1111   Apr 2009   [Refereed]
Optical asymmetry with regard to transmission has been numerically explored in one-dimensional (1D) plasmoniccrystal slabs (PlCSs) with the help of a genetic algorithm (GA). Optically deep asymmetric PlCSs are notobtained in one-layer systems and ...
IWANAGA Masanobu
Applied Physics Letters   92(15) 153102   2008
IWANAGA Masanobu
Optics Letters   32(10) 1314-1316   2007
American Journal of Physics   75(10) 899-902   2007
Journal of Luminescence   102 663-668   2003
Spontaneous Excition Dissociation: Repulsive Correlation between Polarons in Lead-Halide Crystals
AGUNE GIJUTSU CENTER,Solid State Physics   37(11) 817-822   2002
Physical Review B   66 064304(1)-064304(8)   2002
Physical Review B   65 214306(1)-214306(8)   2002
Physical Review B   62(16) 10766-10773   2000


岩長 祐伸
サイバーメディア HPC ジャーナル   5 27-30   Jul 2015   [Refereed]
大阪大学サイバーメディアセンターの大型計算機(SX-9, NEC製)を利用して得た研究成果について平成26年度の結果を中心に解説する。数値計算と対応する実験結果についても合わせて述べることで、計算のみに閉じない大規模数値計算の効用を明示する。
岩長 祐伸
東北大学サイバーサイエンスセンター大規模科学計算システム広報 SENAC   46(4) 13-18   Oct 2013   [Refereed]

Books etc

Plasmonic Resonators: Fundamentals, Advances, and Applications
IWANAGA, Masanobu
Plasmonic resonators, composed of metallic micro- and nanostructures, belong to category of excited-state physics on resonances at GHz to PHz. The dynamical physics is in contrast to the ground-state physics that includes, in a wide sense, thermal...
Collective Plasmonic States Emerged in Metallic Nanorod Array and Their Application
Masanobu Iwanaga
Periodic metallic nanorod arrays have been investigated based on the numerical methods. It was shown that the nanorod arrays have collective resonant states or coherent oscillations outside each nanorod; the field distributions suggest that the re...

Conference Activities & Talks

岩長 祐伸
日本学術振興会メタマテリアル187委員会 平成30年度第二回研究会   13 Sep 2018   
Fluorescence-Enhanced Effect on Metasurfaces Made of Mie Resonators
岩長 祐伸
第65回応用物理学会春季学術講演会   17 Mar 2018   
Metasurface Biosensors: Plasmonic vs Dielectric
岩長 祐伸
電磁メタマテリアル講演会   15 Mar 2018   
Fabrication and Application of Light-Emitting Optical Metasurfaces
宮崎 英樹, 岩長 祐伸
レーザー学会学術講演会第38回年次大会   24 Jan 2018   
Large-scale structural search for light-wave manipulating metasurfaces and the creation of functions
岩長 祐伸
第4回「京」を中核とするHPCIシステム利用研究課題 成果報告会   2 Nov 2017   
 機能性を設計された人工表面ナノ構造(メタ表面)で光の吸収や放射を自由度高く操作することが可能になりつつある。本研究では、メタ表面を新規に設計することにより、既存の材料では実現できない特性を得ながら、素子構造の高機能化、軽量化、省材料化を進めることを目的として大規模な数値的研究を実施した。メタ表面を構成する物質にこれまであまり用いられていない元素種を取り込むことも意識しながら研究を進めた。 可視光域付近で動作する低消費電力の光放射メタ表面を実現するため、簡潔な構造ながら完全光吸収を示すメン...