Original Papers
36. T. Umakoshi*, H. Arata, and P. Verma,
"Nanoscale optical switching of photochromic material by ultraviolet and visible plasmon nanofocusing"
2025
35. H. Matsui, C. Ganser, K. Tamaki, Q. Liu, F.Y. Chan, T. Uchihashi, P. Verma, Y. Sagara, S. Yagai, T. Umakoshi*,
“Tip-scan high-speed atomic force microscopy in organic solvent: A versatile tool for visualizing dynamic behaviors of soft-materials,”
34. T. Umakoshi, and P. Verma*,
"Plasmon nanofocusing for tip-enhanced Raman spectroscopy: Principles, strategies, and applications”
Journal of Raman Spectroscopy 0, 1-12 (2025).
33. T. Umakoshi*,
"Recent advances in near-field optical microscopy"
JSAP Review, 2025, 250418 (2025).
32. N. Kumar*, T. Umakoshi*, and N. Jiang*,
“Advances in chemical imaging using plasmon-enhanced optical spectroscopy”
Optics Communications, 596, 132386 (2025).
31. T. Li, A. Schirato, T. Suwabe, R. P. Zaccaria, P. Verma, and T. Umakoshi*,
“Comparison of near-field light intensities: plasmon nanofocusing versus localized plasmon resonance”
2024
30. A. J. Hobro*, N. Pavillon, K. Koike, T. Sugiyama, T. Umakoshi, P. Verma, K. Fujita, and N. I. Smith*,
“Imaging vs Nonimaging Raman Spectroscopy for High-Throughput Single-Cell Phenotyping”,
Analytical Chemistry, 96, 7047−7055 (2024).
29. K. Yang, FY Chan, H. Watanabe, S. Yoshioka, Y. Inouye, T. Uchihashi, H. Ishitobi, P. Verma, and T. Umakoshi*,
"In-situ real-time observation of photo-induced nanoscale azo-polymer motions using high-speed atomic force microscopy combined with an inverted optical microscope"
Nano Letters, 24, 2805-2811 (2024).
*press released in
*featured in
2023
28. T. Umakoshi*,
"Near-field optical microscopy toward its applications for biological studies",
27. T. Umakoshi*, T. Urakami, H. Kidoguchi, K. Yang, P. Verma, H. Sato, M. Higashi, and I. Tsukamoto*,
“Raman Spectroscopic and DFT Study of COA-Cl and Its Analogues”
2022
26. R. Yadav, T. Umakoshi, and P. Verma*,
"Numerical characterization of optical properties of tapered plasmonic structure on a cantilever pyramidal tip for plasmon nanofocusing"
AIP Advances, 12, 085216 (2022).
25. T. Umakoshi*, K. Kawashima, T. Moriyama, R. Kato, and P. Verma,
“Tip-enhanced Raman spectroscopy with amplitude-controlled tapping-mode AFM”
Scientific Reports, 12, 12776 (2022).
24. R. Kato, T. Moriyama, T. Umakoshi*, T. Yano, and P. Verma*,
“Ultrastable tip-enhanced heperspectral optical nanoimaging for defect analysis of large-sized WS2 layers”
2021
23. R. Kato, T. Umakoshi, and P. Verma*.
“Raman spectroscopic nanoimaging of optical fields of metal nanostructures with a chemically modified metallic tip”
The Journal of Physical Chemistry C, 125, 20397-20404 (2021).
22. T. Moriyama, T. Umakoshi*, Y. Hattori*, K. Taguchi, P. Verma, and M. Kitamura.
“Polarization Raman imaging of organic monolayer islands for crystal orientation analysis”
21. K. Taguchi, T. Umakoshi*, S. Inoue, and P. Verma.
“Broadband plasmon nanofocusing: Comprehensive study of broadband nanoscale light source”
20. T. Sugiyama, A. J. Hobro*, N. Pavillon, T. Umakoshi, P. Verma, and N. Smith*,
"Label-free Raman mapping of saturated and unsaturated fatty acid uptake, storage, and return toward baseline levels in macrophages"
2020
19. R. T. Sam, T. Umakoshi, and P. Verma*
"Probing stacking configurations in a few layered MoS2 by low frequency Raman spectroscopy"
Scientific Reports, 10, 21227 (2020).
18. R. T. Sam, T. Umakoshi, and P. Verma*
"Defect-related anomalous low-frequency Raman scattering in a few-layered MoS2"
Applied Physics Express, 13, 072003 (2020).
17. R. Kato, S. Igarashi, T. Umakoshi, and P. Verma*
"Tip-enhanced Raman Spectroscopy of Multi-Walled Carbon Nanotubes through D-band Imaging: Implications for Nanoscale Analysis of Interwall Interactions"
ACS Appl. Nano Mater., 6, 6001-6008 (2020).
16. R. Kato, K. Taguchi, Y. Ravi, T. Umakoshi*, and P. Verma
"One-side metal-coated pyramidal cantilever tips for highly reproducible tip-enhanced Raman spectroscopy"
Nanotechnology, 31, 335207 (2020).
15. T. Umakoshi*, M. Tanaka, Y. Saito, and P. Verma*
"White nano light source for optical nanoimaging",
Science Advances, 6(23), eaba4179 (2020).
*Phys.orgに記事が掲載されました。
14. T. Umakoshi#, M. Taniguchi#, and P. Verma*
"Anharmonic effects in single-walled carbon nanotubes analyzed through low-temperature Raman imaging",
The Journal of Physical Chemistry C, 124(12), 6922-6928 (2020).
#contributed equally
13. B. S. Bhardwaj, R. T. Sam, T. Umakoshi, N. Namba, T. Uemura, T. Sekitani, and P. Verma*,
“Probing inter-molecular interactions of dinaphthothienothiophene (DNTT) molecules in a transistor device using low-frequency Raman spectroscopy”,
Applied Physics Express, 13, 022010 (2020).
12. T. Umakoshi#, S. Fukuda#, R. Iino, T. Uchihashi, and T. Ando*,
"High-speed near-field fluorescence microscopy combined with high-speed atomic force microscopy for biological studies"
BBA General Subjects, 1864, 129325 (2020).
#contributed equally
2019
11. B. S. Bhardwaj#, T. Sugiyama#, N. Namba, T. Umakoshi, T. Uemura, T. Sekitani, and P. Verma*,
"Orientation analysis of pentacene molecules in organic field-effect transistor devices using polarization-dependent Raman spectroscopy"
Scientific Reports, 9, 15149 (2019).
#contributed equally
10. B. S. Bhardwaj, T. Sugiyama, N. Namba, T. Umakoshi, T. Uemura, T. Sekitani, and P. Verma*,
"Raman spectroscopic studies of Dinaphthothienothiophene (DNTT)"
9. R. Kato, T. Umakoshi*, R. T. Sam, and P. Verma,
"Probing nanoscale defects and wrinkles in MoS2 by tip-enhanced Raman spectroscopic imaging"
Applied Physics Letters, 114, 073105 (2019).
*highlighted as a top article in the Low-Dimensional Materials and Nanotechnologies section of the Journal.
8. Y. Ohashi, B. Ranjan, Y. Saito, T. Umakoshi, and P. Verma*,
"Tapered arrangement of metallic nanorod chains for magnified plasmonic nanoimaging",
Scientific Reports, 9, 2656 (2019).
2018
7. Y. Ohashi, B. Ranjan, Y. Saito, T. Umakoshi, and P. Verma*,
"Plasmonic transfer of near-field light from subwavelength objects through a gold-nanorod chain",
Applied Physics Express, 11, 102001 (2018).
6. T. Umakoshi, Y. Saito, and P. Verma,
"Metallic tips for efficient plasmon nanofocusing and advanced optical nano-imaging",
Proceedings of SPIE, 10726, 1072607 (2018).
5. T. Umakoshi, H. Udaka, T. Uchihashi, T. Ando, M. Suzuki, and T. Fukuda*,
"Quantum-dot antibody conjugation visualized at the single-molecule scale with high-speed atomic force microscopy",
Colloids and Surfaces B: Biointerfaces, 167, 267-274 (2018).
2017
4. R. Kato, Y. Saito, T. Umakoshi, and P. Verma,
"Near-field visible light absorption imaging by Raman-nano-light source",
Proceedings of SPIE, 10350 (2017).
2016
3. T. Umakoshi, Y. Saito, and P. Verma*,
“Highly efficient plasmonic tip design for plasmon nanofocusing in near-field optical microscopy”,
Nanoscale, 8, 5634-5640, (2016).
2013
2. T. Umakoshi, T. Yano, Y. Saito, and P. Verma,
“A new technique for fabrication of better metallic nanotips for nanoimaging through tip-enhanced Raman spectroscopy”,
Proceedings of SPIE, 8815, 88150O (2013).
2012
1. T. Umakoshi, T. Yano, Y. Saito, and P. Verma*,
“Fabrication of near-field plasmonic tip by photoreduction for strong enhancement in tip-enhanced Raman spectroscopy”,
Books
2024
3. 馬越 貴之,
“量子技術を用いたラベルフリー超解像顕微鏡の開発” (第２章 量子デバイス),
量子生命科学ハンドブック、エヌ・ティー・エス, (2024).
2022
2. T Umakoshi, and P. Verma
“Tip-enhanced Raman spectroscopy for optical nanoimaging” (Book chapter),
Molecular and Laser Spectroscopy, Elsevier, 3, 55-100 (2022).
2021
1. T. Umakoshi, and P. Verma
“Tip-enhanced Raman spectroscopy” (Book chapter),
“Modern techniques of spectroscopy”, Springer Nature, 13, 209-234 (2021).
Misc
2025
11. 馬越 貴之,
“近接場光学顕微鏡の新技術”,
応用物理, 5月号, 94, 254-258 (2025).
*selected as a cover art。
2024
10. 馬越 貴之,
“光で変形するアゾポリマー薄膜の変形過程をナノレベルで動画観察”,
光アライアンス, 8月号, OA2405-05, 35-39 (2024).
9. T. Umakoshi,
“Plasmon Nanofocusing: Generation of Broadband Nanoscale Light Source and Its Spectroscopic Applications”,
Journal of the Spectroscopical Society of Japan,, 73(2), 41-48 (2024).
2023
8. 加藤 遼、馬越 貴之、バルマ プラブハット,
“チップ増強ラマン分光法による二次元ナノ材料の表面構造解析”,
7. 加藤 遼、森山 季、馬越 貴之、矢野 隆章、バルマ プラブハット,
“広視野プラズモニック超解像ラマンイメージング”,
2021
6. T. Umakoshi,
“Development of Near-field Scanning Optical Microscopy toward Its Application for Biological Studies”,
SEIBUTSU BUTSURI, 62(2), 128-130 (2022).
2020
5. T. Umakoshi, Y. Saito, and P. Verma
“Broadband plasmon nanofocusing and its applications for optical measurements”,
Kogaku, 49(12), 487-493 (2020).
4. T. Umakoshi,
“Encouragement of 3DCG”,
Kogaku, 49(10), 429-431 (2020).
2018
3. T. Umakoshi,
“Optical Communication -connected optically or physically-”,
Manufacturing & Technology, 70, 3 (49-51), (2018).
2016
2. Y. Saito, and T. Umakoshi,
"Nano-imaging with Near-field Optical Microscope",
Journal of the Surface Science Society of Japan, 37, 12 (2016).
2014
1. T. Umakoshi,
“Learning by Teaching”,
Optics & Photonics News, Optical Society of America, January 13th 2014.
Patent
2019
1. 馬越 貴之, 谷口 雅紀, バルマプラブハット
"試料温度調整装置"
特願2019-040790
