Reviewed paper

■ Ryota Takaku et al., "Performance of a 200 mm Diameter Achromatic HWP with Laser-Ablated Sub-Wavelength Structures", Journal of Low Temperature Physics (2022)
JLTP

■ Ryota Takaku, Qi Wen et al., "Large diameter millimeter-wave low-pass filter made of alumina with laser ablated anti-reflection coating", Optics Express 29, 41745-41765 (2021)
OE arXiv

■ Ryota Takaku et al., "Broadband, millimeter-wave anti-reflective structures on sapphire ablated with femto-second laser", Journal of Applied Physics 128, 225302 (2020)
JAP arXiv

Selected non-refereed papers

■ Ryota Takaku et al., "Impact of the effective thickness from anti-reflective sub-wavelength structures in achromatic half-wave plate design", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121902 (2022)
SPIE

■ Ryota Takaku et al., "Demonstration of anti-reflective structures over a large area for CMB polarization experiments", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114531A (2020)
SPIE

PhD dissertation

■ Ryota Takaku, "A Broadband Half-wave Plate for a Space-borne CMB Polarimeter Using Laser Ablation", A Dissertation Submitted for the Degree of Doctor of Philosophy, Department of Physics, Graduate School of Science, The University of Tokyo (2022)
("レーザー加工技術を用いた宇宙用CMB偏光検出実験のための広帯域半波長板", 令和4年12月博士(理学)申請, 東京大学大学院理学系研究科物理学専攻 (2022) )
PDF(google drive, temporary)

Awards

Press release