Original Papers
39. T. Umakoshi*, H. Arata, and P. Verma,
"Nanoscale optical switching of photochromic material by ultraviolet and visible plasmon nanofocusing"
2026
38. Z. Zong, R. Morisaki, K. Sugiyama, M. Higashi, T. Umakoshi, and P. Verma*,
“Activation and detection of forbidden low-frequency Raman modes in MoS2 by near-field gradient illumination,”
37. F. Wakabayashi, K. Tamaki, F.Y. Chan, T. Uchihashi, P. Verma, and T. Umakoshi*,
“Real-time visualization of plasmonic nanoparticle growth dynamics by high-speed atomic force microscopy,”
36. K. Murai, H. Matsui, T. Seki, T. Umakoshi, C. Ganser, T. Kajitani, S. Datta, H. Hanayama, and S. Yagai*,
“Diarylethene-powered photo-switching between precipitated nanostrips and dispersed supramolecular polymers,”
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”
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
