Details of the Researcher

PHOTO

Hoang Anh Truong
Section
Graduate School of Engineering
Job title
Assistant Professor
Degree

  • 博士（医工学）（東北大学）

  • 修士（工学）（群馬大学）

e-Rad No.
10865405

Research History 5

  • 2024/04 - Present
    Tohoku University　Graduate School of Engineering Department of Electronic Engineering　assistant professor

  • 2020/04 - 2024/03
    Tohoku University　Graduate School of Engineering Department of Communications Engineering　Assistant Professor

  • 2022/04 - 2022/12
    University of Illinois Urbana Champaign　客員研究員

  • 2019/04 - 2020/03
    Tohoku University New Industry Creation Hatchery Center　Researcher

  • 2013/04 - 2016/03
    Tokyo Electron

Professional Memberships 3

  • IEICE

    2024/04 - Present

  • OPTICA

    2023/03 - Present

  • OSJ

    2021/01 -

Research Interests 4

  • optical resonator

  • semiconductor process

  • chemical imaging sensor

  • biosensor

Awards 3

  1. 石田實記念財団研究奨励賞

    2024/11　石田實記念財団　超高感度検出を実現するバイオセンサに 向けた光共振器の開発

  2. 第１６回井上リサーチアウォード受賞者

    2023/12　公益財団法人井上科学振興財団

  3. 2022年度（研究助成）第1回 花王Crescent award

    2022　公益財団法人花王芸術科学財団

Papers 14

  1. Nanograting Microring Optical Resonators for Enhanced Refractive Index Sensitivity

    Anh Igarashi, Yasuo Ohtera, Tatsuo Yoshinobu, Hirohito Yamada

    IEEE Sensors Letters　1-4　2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI： 10.1109/lsens.2025.3585131 　

    eISSN： 2475-1472

  2. High-Q Nanograting Ring Resonator Coupled with Grating Waveguides

    A. Igarashi, Y. Ohtera, H. Yamada

    2024

  3. Photonic Crystal Enhanced Fluorescence Emission for Ultrasensitive Biosensing in Liquid Biopsies

    Y. Xiong, P. Barya, L. Zhou, S. Shepherd, S. Liu, L. D. Akin, O. H. Arogundade, T. D. Canady, C. Che, L. Cooper, A. Dwivedy, R. Gupta, Q. Huang, A. Igarashi, H. K. Lee, C. M. Race, T. Song, J. Tibbs, X. Wang, T. Wang, L. Rong, M. Kohli, A. M. Smith, S. Singamaneni, X. Wang, B. T. Cunningham

    in CLEO;Technical Diges;Series;Optica Publishing Group;paper ATu3B.3　2024

  4. Enhancement of Refractive Index Sensitivity Using Small Footprint S-Shaped Double-Spiral Resonators for Biosensing

    Anh Igarashi, Maho Abe, Shigeki Kuroiwa, Keishi Ohashi, Hirohito Yamada

    Sensors　23　(13)　6177-6177　2023/07/05

    Publisher: MDPI AG

    DOI： 10.3390/s23136177 　

    eISSN： 1424-8220

    More details Close

    We demonstrate an S-shaped double-spiral microresonator (DSR) for detecting small volumes of analytes, such as liquids or gases, penetrating a microfluidic channel. Optical-ring resonators have been applied as label-free and high-sensitivity biosensors by using an evanescent field for sensing the refractive index of analytes. Enlarging the ring resonator size is a solution for amplifying the interactions between the evanescent field and biomolecules to obtain a higher refractive index sensitivity of the attached analytes. However, it requires a large platform of a hundred square millimeters, and 99% of the cavity area would not involve evanescent field sensing. In this report, we demonstrate the novel design of a Si-based S-shaped double-spiral resonator on a silicon-on-insulator substrate for which the cavity size was 41.6 µm × 88.4 µm. The proposed resonator footprint was reduced by 680 times compared to a microring resonator with the same cavity area. The fabricated resonator exposed more sensitive optical characteristics for refractive index biosensing thanks to the enhanced contact interface by a long cavity length of DSR structures. High quality factors of 1.8 × 104 were demonstrated for 1.2 mm length DSR structures, which were more than two times higher than the quality factors of microring resonators. A bulk sensitivity of 1410 nm/RIU was calculated for detecting 1 µL IPA solutions inside a 200 µm wide microchannel by using the DSR cavity, which had more than a 10-fold higher sensitivity than the sensitivity of the microring resonators. A DSR device was also used for the detection of 100 ppm acetone gas inside a closed bottle.

  5. Si-microring resonator with sidewall nanograting structures for high-Q resonance modes

    Anh Igarashi, Koya Murooka, Yasuo Ohtera, Hirohito Yamada

    Optical Review　30　(2)　238-245　2023/03/13

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s10043-023-00793-0 　

    ISSN： 1340-6000

    eISSN： 1349-9432

  6. Photonic Crystal Enhanced Quantum Dot Biosensor for Cancer-associated miRNA Detection

    Yanyu Xiong, Qinglan Huang, Taylor D. Canady, Priyash Barya, Shengyan Liu, Opeyemi H. Arogundade, Caitlin M. Race, Congnyu Che, Xiaojing Wang, Lifeng Zhou, Anh Igarashi, Xing Wang, Manish Kohli, Andrew M. Smith, Brian T. Cunningham

    2022 IEEE Sensors　2022/10/30

    Publisher: IEEE

    DOI： 10.1109/sensors52175.2022.9967032 　

  7. A compact-size and ultrasensitive optical biosensor using a double-spiral microresonator

    Anh Igarashi, Yugang Shang, Shigeki Kuroiwa, Keishi Ohashi, Hirohito Yamada

    2022 IEEE Sensors　1-4　2022/10/30

    Publisher: IEEE

    DOI： 10.1109/sensors52175.2022.9967064 　

  8. Photonic Biosensor for Label-Free Detection Based on Photonic Nanostructures on Si-Waveguide Ring Resonator Peer-reviewed

    Hoang Anh Truong, Yugang Shang, Shunsuke Abe, Nobuyuki Matsuda, Hirohito Yamada

    Engineering Proceedings　6　(1)　39-39　2021/05/19

    Publisher: MDPI AG

    DOI： 10.3390/i3s2021dresden-10158 　

    eISSN： 2673-4591

    More details Close

    A new structure of a micro-ring resonator for label-free biosensing is proposed. The structure includes sidewall-grating Si waveguide and periodical side-blocks that can enhance the light–matter interaction. From the electromagnetic simulations, the proposed structure exhibits a four-fold improvement in terms of sensitivity compared with the conventional structure. Moreover, the quality factor of the proposed structure is not degraded from that of the conventional structure. The improved sensitivity is promising for the detection of nanoparticles that can be applied to the environmental field and clinical diagnostics.

  9. A Gas‐Sensitive SPIM Sensor for Detection of Ethanol Using SnO2 as Sensing Element

    Mengyun Wang, Hoang A. Truong, Carl F. Werner, Ko‐ichiro Miyamoto, Tatsuo Yoshinobu

    physica status solidi (a)　216　(12)　1800766-1800766　2019/06

    Publisher: Wiley

    DOI： 10.1002/pssa.201800766 　

    ISSN： 1862-6300

    eISSN： 1862-6319

  10. Multi-Well Sensor Platform Based on a Partially Etched Structure of a Light-Addressable Potentiometric Sensor

    Hoang Anh Truong, Carl Frederik Werner, Ko-ichiro Miyamoto, Tatsuo Yoshinobu

    PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE　216　(12)　2019/06

    DOI： 10.1002/pssa.201800764 　

    ISSN： 1862-6300

    eISSN： 1862-6319

  11. Imaging detection of ethanol vapor by scanning photo-induced impedance microscopy with suspended–gate structure

    Mengyun Wang, Hoang Anh Truong, Carl Frederik Werner, Ko-ichiro Miyamoto, Tatsuo Yoshinobu

    2019 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN)　2019/05

    Publisher: IEEE

    DOI： 10.1109/isoen.2019.8823159 　

  12. A Partially Etched Structure of Light-Addressable Potentiometric Sensor for High-Spatial-Resolution and High-Speed Chemical Imaging

    Hoang Anh Truong, Carl Frederik Werner, Ko-ichiro Miyamoto, Tatsuo Yoshinobu

    PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE　215　(15)　2018/08

    DOI： 10.1002/pssa.201700964 　

    ISSN： 1862-6300

    eISSN： 1862-6319

  13. Fabrication of Si Nanowire Biosensor Using FIB and its Evaluations

    Anh Hoang Truong, Hayato Sone, Sumio Hosaka

    Key Engineering Materials　596　224-228　2013/12

    Publisher: Trans Tech Publications, Ltd.

    DOI： 10.4028/www.scientific.net/kem.596.224 　

    eISSN： 1662-9795

    More details Close

    We demonstrated the fabrication of silicon nanowire (SiNW) sensors by focused ion beam (FIB) method and determined the effects of changes of nanowire parameters of width and wire-number on the SiNW electrical property. SiNW sensors were fabricated on a silicon-on-insulator (SOI) wafer with Au-Cr electrodes by the FIB method. We fabricated the SiNW sensor with a minimum width of 90 nm, length of 20 <italic>μ</italic>m and height of 60 nm. The <italic>I-V</italic> characteristics in the state of ohmic contact were obtained, and the SiNW resistance was found to have 0.86 MΩ and a resistivity of 0.02 Ωcm. In addition, the electrical resistance dependence on width and wire-number was investigated. We found that wire conductance could be increased by increasing the wire-number and wire width.

  14. Fabrication of Hole-Type Microcantilevers Using FIB and its Evaluations

    Anh Hoang Truong, Hayato Sone, Tomoyuki Kawakami, Sumio Hosaka

    Key Engineering Materials　534　251-256　2013/01

    Publisher: Trans Tech Publications, Ltd.

    DOI： 10.4028/www.scientific.net/kem.534.251 　

    eISSN： 1662-9795

    More details Close

    A high sensitive mass biosensor using a piezoresistive hole-type microcantilever has been developed. To optimize the cantilever shape for high sensitivity easily, we demonstrate frame-type cantilevers with holes on the surface fabricated by Focused Ion Beam (FIB) method and evaluate their sensitivity in both air and liquid. Resonance frequency of hole-type cantilevers increased about 20% and 40% in air and in water, respectively. On the other hand, while Q value decreased from 10% to 30% in air, it increased sharply from 0% to 50% in water with increasing of hole-size. Especially, when we increased the frame size from 0.5 µm to 2.5 µm, resonance frequency changing and Q value changing in water were 60% and 125%, respectively. However, the Q value of large hole (36x60µm2) in water inversely decreased due to the decline in rigidity. The sensitivity of hole-type cantilever of Δ<italic>m</italic>/Δ<italic>f</italic>(hole-size = 12x12μm2; frame-size = 2.5μm) was 23.1 fg/Hz, 10 times smaller than the conventional type cantilever.

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Presentations 21

  1. High-Q Nanograting Ring Resonator Coupled with Grating Waveguides

    Anh Igarashi, Yasuo Ohtera, Hirohito Yamada

    CLEO PacificRim 2024　2024/08/06

  2. Photonic Crystal Enhanced Fluorescence Emission for Ultrasensitive Biosensing in Liquid Biopsies

    Yanyu Xiong, Priyash Barya, Lifeng Zhou, Skye Shepherd, Shengyan Liu, Lucas D. Akin, Opeyemi H. Arogundade, Taylor D. Canady, Congnyu Che, Laura Cooper, Abhisek Dwivedy, Rohit Gupta, Qinglan Huang, Anh Igarashi, Han Keun Lee, Caitlin M. Race, Tingjie Song, Joseph Tibbs, Xiaojing Wang, Tong Wang, Lijun Rong, Manish Kohli, Andrew M. Smith, Srikanth Singamaneni, Xing Wang, Brian T. Cunningham

    CLEO 2024　2024/05/07

  3. Semiconductor-based biosensing technology Invited

    Latest trends and future challenges of semiconductor technologies　2024/02/22

  4. High-Q concentric multimode optical ring resonator with nano grating structure bus-waveguide

    Koya Murooka, Anh Igarashi, Hirohito Yamada

    Photonic Device Workshop (PDW) 2023　2023/12/07

  5. An ultra ultra-compact spiral resonator in a microchannel for a sensitive refractive index biosensor

    Anh Igarashi, Maho Abe, Shigeki Kuroiwa, Keishi Ohashi, Hirohito Yamada

    Future Technologies from KUMAMOTO　2023/11/08

  6. Study of practical nano grating ring resonator structure for biosensing applications

    室岡宏彌, 五十嵐アン, 山田博仁

    2023年度電気関係学会 東北支部連合大会　2023/09/06

  7. Nanograting ring resonator concentric modes for biosensing applications

    Anh Igarashi, Koya Murooka, Yasuo Ohtera, Hirohito Yamada

    Optical Symposium　2023/06/23

  8. Effect of concentric modes formed by nanograting structured ring resonator on biosensing sensitivity

    Anh Igarashi, Koya Murooka, Yasuo Ohtera, Hirohito Yamada

    9th Nanotech & Nanomaterials Research Conference　2023/06/14

  9. ナノ格子光リング共振器用バス導波路構造の提案と解析

    室岡 宏彌, 五十嵐 アン, 山田 博仁

    2023年第70回応用物理学会春季学術講演会 [17p-A201-3]　2023/03/17

  10. Photonic Crystal Enhanced Quantum Dot Biosensor for CancerAssociated miRNA Detection

    Yanyu Xiong, Qinglan Huang, Taylor D. Canady, Priyash Barya, Shengyan Liu, Opeyemi Arogundade, Caitlin M. Race, Congnyu Che, Xiaojing Wang, Lifeng Zhou, Anh Igarashi, Xing Wang, Manish Kohli, Andrew Smith, Brian Cunningham

    IEEE Sensors 2022　2022/11/03

  11. A Compact-Size and Ultrasensitive Optical Biosensor Using a Double-Spiral Microresonator

    Anh Igarashi, Yugang Shang, Shigeki Kuroiwa, Keishi Ohashi, Hirohito Yamada

    IEEE Sensors 2022　2022/11/01

  12. Si-microring resonator with sidewall nano-grating structures for high-Q resonance modes

    Anh Igarashi, Koya Murooka, Yasuo Ohtera, Hirohito Yamada

    The 13th International Conference on Optics-photonics Design and Fabrication(ODF'22)　2022/08/03

  13. バイオセンシング感度を向上するダブルスパイラル構造をもつ光共振器

    尚 玉剛, チューン ホアン アン, 山田 博仁

    第69回応用物理学会春季学術講演会　2022/03

  14. Double-spiral microring resonators for enhancing biosensing sensitivity

    Yugang Shang, Hoang Anh Truong, Hirohito Yamada

    2021 International Workshop on Emerging ICT　2021/11/04

  15. Cylindrical-mode Formation in Si-microring Resonator with Sidewall Grating Structures

    Hoang Anh Truong, Hirohito Yamada

    Photonic Device Workshop 2021　2021/11/05

  16. Mode analysis of a complex-grating-structured optical ring resonator

    Hoang Anh Truong, Hirohito Yamada

    Optics ＆ Photonics Japan 2021　2021/10/29

  17. Photonic biosensor for label-free detection based on photonic nanostructures on Si-waveguide ring resonator

    Hoang Anh Truong

    8th International Symposium on Sensor Science　2021/05/28

  18. Modeling Optical Interactions Between Nanodiamond NV Centers and Silicon Nitride Nanograting Resonators

    Anh Igarashi, Junichi Fujikata, Hirohito Yamada

    The 11th International Conference on Surface Plasmon Photonics　2025/05/19

  19. Nanodiamond NV Centers Coupled to Si3N4 Ring Resonators: FDTD Simulation

    Photonic Device Workshop 2024　2024/12/11

  20. Numerical study of a refractive index sensor based on guided mode resonance using a nanograting ring resonator

    Anh Igarashi, Hirohito Yamada, Tatsuo Yoshinobu

    Future Technologies from SENDAI　2024/11/25

  21. Nanograting ring resonator concentric modes for biosensing applications

    Anh Igarashi

    国際光デー記念シンポジウム　2024/07/24

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Research Projects 2

  1. Investigation of disk resonance modes by using Si-grating structured microrings

    Igarashi Anh

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2022/04 - 2025/03

  2. Formation of biomolecules onto nano-structured ring resonator for a high bio-sensitivity

    Offer Organization: The Kao Foundation for Arts and Science

    Institution: Tohoku University

    2022/04 - 2024/03