Prof. Dr. Motoichi Ohtsu | Best Researcher Award

Published on by Physics and Quantum Physics

Prof. Dr. Motoichi Ohtsu | Best Researcher Award

Research Origin for Dressed Photon | Japan

Motoichi Ohtsu is a distinguished researcher in nanophotonics and dressed-photon science, currently affiliated with the Research Origin for Dressed Photon in Yokohama, Japan. His scientific influence is reflected in his extensive Scopus record, which documents 596 publications, 9,084 citations, and an h-index of 47, demonstrating his long-standing impact across photonics and optical materials research. His works span journal articles, conference papers, book chapters, and major monographs, covering themes such as dressed photons, near-field optical science, SiC-based magneto-optical devices, polarization control, and the theoretical foundations connecting dressed photons with off-shell quantum fields. His recent ORCID-listed contributions include Perspective on an Emerging Frontier of Nanoscience Opened up by Dressed Photon Studies, Drastic Advancement in Nanophotonics Achieved by a New Dressed Photon Study, and influential papers on phase delay, polarization rotation, and cosmological links to dressed-photon theory. Ohtsu’s research interests encompass nanophotonics, near-field interactions, magneto-optical effects, optical phase phenomena, and advanced semiconductor photonics. With decades of academic and research leadership, including serving as Chief Director at the Research Origin for Dressed Photon, he has significantly shaped the evolution of modern optical science. In conclusion, his body of work continues to define new directions in dressed-photon technology and next-generation nanophotonic systems.

Profiles : Orcid | Scopus

Featured Publications

Sakuma, H., Ojima, I., & Ohtsu, M. (2023). Perspective on an emerging frontier of nanoscience opened up by dressed photon studies. Nanoarchitectonics.

Sakuma, H., Ojima, I., & Ohtsu, M. (2021). Drastic advancement in nanophotonics achieved by a new dressed photon study. Journal of the European Optical Society Rapid Publications.

Ohtsu, M., et al. (2020). SiC transmission-type polarization rotator using a large magneto-optical effect boosted and stabilized by dressed photons. Scientific Reports.

Ohtsu, M., et al. (2020). Off-shell quantum fields to connect dressed photons with cosmology. Symmetry.

Dr. Kousik Bera | Editorial Board Member

Published on by Physics and Quantum Physics

Dr. Kousik Bera | Editorial Board Member

Indian Institute of Technology Bombay | India

Kousik Bera is an emerging researcher in optical physics and advanced materials science, with an h-index of 4, 11 research documents, and 48 citations across 44 citing works. He earned his research training at premier Indian institutions, focusing extensively on Raman spectroscopy, thermal transport in two-dimensional materials, nonlinear optics, and quantum photonics. His experience spans studies on hexagonal boron nitride (hBN), GaN nanowall networks, Heusler alloys, Pd–Ag nanostructures, and entangled photon generation using PPKTP crystals. He has contributed to prestigious journals such as Optics Communications, Physical Review B, Journal of Applied Physics, Applied Physics Letters, Optical Materials, and Nanotechnology. His research interests include 2D materials, ultrafast laser–matter interactions, spectroscopy-driven materials characterization, superconductivity, and quantum-enhanced optical systems. Bera’s work integrates experimental materials science with quantum photonic applications, highlighting his interdisciplinary expertise. His contributions have supported advancements in thermal conductivity engineering, strain analysis, nonlinear optical behavior, and surface-enhanced Raman spectroscopy (SERS). He has collaborated with multiple national and international research groups, extending the impact of his work across several domains of condensed matter physics. With a steadily growing publication record and diversified research output, he continues to advance innovative spectroscopic and nanomaterial-based methodologies.

Profiles : Google Scholar | Scopus | Orcid

Featured Publications

Bera, K., Dubey, P. K., Kumar, A., & Jha, M. (2025). Bright source of degenerate polarization-entangled photons using type-0 PPKTP crystal: Effects of accidental coincidences. Optics Communications, 132401. https://doi.org/10.1016/j.optcom.2025.132401

Bera, K., Moram, S. S. B., Banerjee, D., Lahiri, J., & Rao Soma, V. (2024). Surface enhanced Raman scattering-based sensing and ultrafast nonlinear optical properties of silver-hexagonal boron nitride nanocomposites achieved by femtosecond laser ablation. Optical Materials, 157, 116393. https://doi.org/10.1016/j.optmat.2024.116393

Das, N. M., Chauhan, A., Bharati, M. S. S., Bera, K., et al. (2024). Nanostructured bi-metallic Pd–Ag alloy films for surface-enhanced Raman spectroscopy-based sensing application. Journal of Vacuum Science & Technology A, 42(5). https://doi.org/10.1116/6.0003748

Bera, K., Chugh, D., Bandopadhyay, A., Tan, H. H., Roy, A., & Jagadish, C. (2023). Decoupling the roles of defects/impurities and wrinkles in thermal conductivity of wafer-scale hBN films. Journal of Applied Physics, 134(15). https://doi.org/10.1063/5.0168186

Rahaman, A., Paramanik, T., Pal, B., Pal, R., Maji, P., Bera, K., et al. (2023). Surface-phase superconductivity in a Mg-deficient V-doped MgTi₂O₄ spinel. Physical Review B, 107(24), 245124. https://doi.org/10.1103/physrevb.107.245124