Dr. Chiko Otani Profile

Dr. Chiko Otani

Team Leader at RIKEN

SPIE Involvement:

Conference Program Committee | Author

Publications (25)

Proceedings Article | 2 October 2024 Presentation

Development of 2-beam terahertz walk-through body scanner

Chiko Otani, Tomofumi Ikari, Yoshiaki Sasaki

Proceedings Volume PC13141, PC131410A (2024) https://doi.org/10.1117/12.3029456

KEYWORDS: Terahertz radiation, Body scanners, Radar, Prototyping, Inspection, Gait analysis, Chest, 3D metrology, 3D image processing, Transportation security

Read Abstract +

Proceedings Article | 16 August 2024 Presentation + Paper

Commissioning the CMB polarization telescope GroundBIRD with the full set of detectors

Miku Tsujii, Jochem J. Baselmans, Jihoon Choi, Antonio H. Coppens, Alessandro Fasano, Ricardo Tanausú Génova-Santos, Makoto Hattori, Masashi Hazumi, Shunsuke Honda, Takuji Ikemitsu, Hidesato Ishida, Hikaru Ishitsuka, Hoyong Jeong, Yonggil Jo, Kenichi Karatsu, Keisuke Kataoka, Kenji Kiuchi, Junta Komine, Ryo Koyano, Hiroki Kutsuma, Kyungmin Lee, Satoru Mima, Makoto Nagai, Taketo Nagasaki, Masato Naruse, Shugo Oguri, Chiko Otani, Michael Peel, Rafael Rebolo, José Alberto Rubiño-Martín, Yutaro Sekimoto, Yoshinori Sueno, Junya Suzuki, Tohru Taino, Osamu Tajima, Tomonaga Tanaka, David Thoen, Nozomu Tomita, Yuta Tsuji, Tomohisa Uchida, Eunil Won, Mitsuhiro Yoshida

Proceedings Volume 13102, 1310205 (2024) https://doi.org/10.1117/12.3019544

KEYWORDS: Sensors, Telescopes, Polarization, Observatories, Data acquisition, Visualization, Signal detection, Jupiter, Environmental monitoring, Contamination

Read Abstract +

Proceedings Article | 16 August 2024 Poster + Paper

Free space experimental characterization of a multilayer Fabry-Pérot resonator for DALI

Juan Hernández-Cabrera, Javier De Miguel, Elvio Hernández-Suárez, Enrique Joven-Álvarez, Haroldo Lorenzo-Hernández, Chiko Otani, José Alberto Rubiño-Martín

Proceedings Volume 13102, 131021I (2024) https://doi.org/10.1117/12.3018763

KEYWORDS: Antennas, Reflection, Interferometers, Resonators, Reflectivity, Windows, Particles, Equipment, Signal detection, Free space

Read Abstract +

Proceedings Article | 1 August 2021 Presentation + Paper

Development of 300 GHz walk-through body scanner for the security gate applications

Chiko Otani, Tomofumi Ikari, Yoshiaki Sasaki

Proceedings Volume 11827, 118270N (2021) https://doi.org/10.1117/12.2594528

KEYWORDS: Scanners, Imaging systems, Transceivers, Terahertz radiation, Inspection, 3D image processing, Radar

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Presentation + Paper

On-site performance of GroundBIRD, a CMB polarization telescope for large angular scale observations

Shunsuke Honda, Jihoon Choi, Ricardo Tanausu Génova-Santos, Makoto Hattori, Masashi Hazumi, Takuji Ikemitsu, Hidesato Ishida, Hikaru Ishitsuka, Yonggil Jo, Kenichi Karatsu, Kenji Kiuchi, Junta Komine, Ryo Koyano, Hiroki Kutsuma, Kyungmin Lee, Satoru Mima, Makoto Minowa, Joonhyeok Moon, Makoto Nagai, Takeo Nagasaki, Masato Naruse, Shugo Oguri, Chiko Otani, Michael Peel, Rafael Rebolo-López, José Alberto Rubiño-Martín, Yutaro Sekimoto, Yoshinori Sueno, Junya Suzuki, Tohru Taino, Osamu Tajima, Nozomu Tomita, Yuta Tsuji, Tomohisa Uchida, Eunil Won, Mitsuhiro Yoshida

Proceedings Volume 11445, 114457Q (2020) https://doi.org/10.1117/12.2560918

KEYWORDS: Telescopes, Polarization, Sensors, Observatories, Microwave radiation, Field programmable gate arrays, Telecommunications, Optical instrument design, Atmospheric sensing, Detector arrays

Read Abstract +

Proceedings Article | 10 July 2018 Presentation

Performance evaluation of MKDs on a high-speed rotating system for CMB telescope: GroundBIRD (Conference Presentation)

Satoru Mima, Jihoon Choi, Ricardo Tanausú Génova-Santos, Makoto Hattori, Masashi Hazumi, Hikaru Ishitsuka, Fumiyasu Kanno, Kenichi Karatsu, Kenji Kiuchi, Junta Komine, Ryo Koyano, Hiroki Kutsuma, Kyungmin Lee, Makoto Minowa, Makoto Nagai, Takeo Nagasaki, Masato Naruse, Shugo Oguri, Chiko Otani, Rafael Rebolo, José Alberto Rubiño-Martín, Yutaro Sekimoto, Munehisa Semoto, Junya Suzuki, Tohru Taino, Osamu Tajima, Nozomu Tomita, Tomohisa Uchida, Eunil Won, Mitsuhiro Yoshida

Proceedings Volume 10708, 107081I (2018) https://doi.org/10.1117/12.2314321

KEYWORDS: Telescopes, Magnetism, Modulation, Microwave radiation, Polarization, Sensors, Optical scanning systems, Inductance, Atmospheric optics, Observatories

Read Abstract +

The cosmic microwave background (CMB) radiation is an afterglow of the Big Bang. It contains the crucial keys to understand the beginning of the universe. In particular, the odd-parity patterns of CMB polarization, B-modes, at more than degree-scale, are the best probe to detect primordial gravitational waves at the cosmic inflation. The GroundBIRD experiment aims to detect this large angular scale patterns from the ground. The experiment employs novel techniques; a high-speed rotational scanning system (20 revolution-per-minutes) with cold optics below 4K, and microwave kinetic inductance detectors (MKIDs) as the focal plane detectors. The fast scanning modulation is a crucial characteristic in our observation strategy to mitigate effects of the atmospheric fluctuation. The telescope rotates and scans the sky along the azimuth at the elevation angle of 60 degrees at Teide observatory in the Canary Islands. It allows us to measure CMB polarization patterns at a wide multipole range, 6 < \ell < 300, i.e. aiming to catch the reionization bump. We have developed a telescope mount with 3-axis rotation mechanism (azimuth, elevation, and boresight). We are evaluating the vibration at the focal plane position with rotating the telescope mount. The focal plane consists of seven hexagonal corrugated horn coupled MKIDs array: six hexagon units are for 145 GHz band (55 pixels/unit), and one unit is for 220 GHz band (112 pixels). Each pixel consists of a corrugated horn, a planner OMT, millimeter wave circuits for transmission of dual-polarization signals with the suppression of crosstalk modes, and two MKIDs for each polarization. Magnetic shields are also mounted so as to suppress the external magnetic fields. Trapped magnetic fields inside of the superconducting materials decrease the performance of the MKID. The geomagnetism is the static and large magnetic fields. The telescope motion makes modulation of the geomagnetism as well as the modulation of CMB signals. Therefore, we need careful evaluation associating with the telescope rotation. By using a small evaluation system with modulated magnetic fields, we understand impacts the magnetic shield as well as responses of the MKID for the modulated magnetic field. We design the shield based on them. In this presentation, we will report an evaluation of detector responses on the high-speed rotating system along the azimuth. We will also show demonstrations of our own readout electronics which is well matching with the rapid scan modulation strategy.

Proceedings Article | 29 July 2016 Paper

LiteBIRD: lite satellite for the study of B-mode polarization and inflation from cosmic microwave background radiation detection

H. Ishino, Y. Akiba, K. Arnold, D. Barron, J. Borrill, R. Chendra, Y. Chinone, S. Cho, A. Cukierman, T. de Haan, M. Dobbs, A. Dominjon, T. Dotani, T. Elleflot, J. Errard, T. Fujino, H. Fuke, T. Funaki, N. Goeckner-Wald, N. Halverson, P. Harvey, T. Hasebe, M. Hasegawa, K. Hattori, M. Hattori, M. Hazumi, N. Hidehira, C. Hill, G. Hilton, W. Holzapfel, Y. Hori, J. Hubmayr, K. Ichiki, H. Imada, J. Inatani, M. Inoue, Y. Inoue, F. Irie, K. Irwin, H. Ishitsuka, O. Jeong, H. Kanai, K. Karatsu, S. Kashima, N. Katayama, I. Kawano, T. Kawasaki, B. Keating, S. Kernasovskiy, R. Keskitalo, A. Kibayashi, Y. Kida, N. Kimura, K. Kimura, T. Kisner, K. Kohri, E. Komatsu, K. Komatsu, C.-L. Kuo, S. Kuromiya, A. Kusaka, A. Lee, D. Li, E. Linder, M. Maki, H. Matsuhara, T. Matsumura, S. Matsuoka, S. Matsuura, S. Mima, Y. Minami, K. Mitsuda, M. Nagai, T. Nagasaki, R. Nagata, M. Nakajima, S. Nakamura, T. Namikawa, M. Naruse, T. Nishibori, K. Nishijo, H. Nishino, A. Noda, T. Noguchi, H. Ogawa, W. Ogburn, S. Oguri, I. Ohta, N. Okada, A. Okamoto, T. Okamura, C. Otani, G. Pisano, G. Rebeiz, P. Richards, S. Sakai, Y. Sakurai, Y. Sato, N. Sato, Y. Segawa, S. Sekiguchi, Y. Sekimoto, M. Sekine, U. Seljak, B. Sherwin, T. Shimizu, K. Shinozaki, S. Shu, R. Stompor, H. Sugai, H. Sugita, J. Suzuki, T. Suzuki, A. Suzuki, O. Tajima, S. Takada, S. Takakura, K. Takano, S. Takatori, Y. Takei, D. Tanabe, T. Tomaru, N. Tomita, P. Turin, S. Uozumi, S. Utsunomiya, Y. Uzawa, T. Wada, H. Watanabe, B. Westbrook, N. Whitehorn, Y. Yamada, R. Yamamoto, N. Yamasaki, T. Yamashita, T. Yoshida, M. Yoshida, K. Yotsumoto

Proceedings Volume 9904, 99040X (2016) https://doi.org/10.1117/12.2231995

KEYWORDS: Telescopes, Satellites, Microwave radiation, Polarization, Sensors, Space telescopes, Space operations, Detector arrays, Mirrors, Bolometers

Read Abstract +

Proceedings Article | 27 July 2016 Paper

GroundBIRD: observations of CMB polarization with fast scan modulation and MKIDs

Shugo Oguri, Jihoon Choi, Thushara Damayanthi, Makoto Hattori, Masashi Hazumi, Hikaru Ishitsuka, Kenji Kiuchi, Ryo Koyano, Hiroki Kutsuma, Kyungmin Lee, Satoru Mima, Makoto Minowa, Makoto Nagai, Taketo Nagasaki, Chiko Otani, Yutaro Sekimoto, Munehisa Semoto, Jun’ya Suzuki, Tohru Taino, Osamu Tajima, Nozomu Tomita, Eunil Won, Tomohisa Uchida, Mitsuhiro Yoshida

Proceedings Volume 9906, 99063L (2016) https://doi.org/10.1117/12.2231672

KEYWORDS: Microwave radiation, Polarization, Mirrors, Inductance, Sensors, Modulation, Telescopes, Prototyping, Calibration, Semiconducting wafers

Read Abstract +

Proceedings Article | 15 October 2015 Paper

THz generation from optical rectification tilted-pulse-front pumping scheme with laser pulse focused to a line

Hai-Wei Du, Hiromichi Hoshina, Chiko Otani

Proceedings Volume 9671, 96710M (2015) https://doi.org/10.1117/12.2199229

KEYWORDS: Terahertz radiation, Crystals, Pulsed laser operation, Laser crystals, Frequency conversion, Optical filters, Metals, Laser energy, Photons, Cameras

Read Abstract +

Proceedings Article | 31 August 2015 Paper

Development of ultra-broadband terahertz time domain ellipsometry

Masatsugu Yamashita, Chiko Otani

Proceedings Volume 9585, 95850J (2015) https://doi.org/10.1117/12.2186928

KEYWORDS: Terahertz radiation, Thin films, Gases, Indium arsenide, Dielectrics, Absorption, Reflection, Phonons, Sensors, Semiconducting wafers

Read Abstract +

Proceedings Article | 2 August 2014 Paper

LiteBIRD: mission overview and design tradeoffs

T. Matsumura, Y. Akiba, J. Borrill, Y. Chinone, M Dobbs, H. Fuke, M. Hasegawa, K. Hattori, M. Hattori, M. Hazumi, W. Holzapfel, Y. Hori, J. Inatani, M. Inoue, Y. Inoue, K. Ishidoshiro, H. Ishino, H. Ishitsuka, K. Karatsu, S. Kashima, N. Katayama, I. Kawano, A. Kibayashi, Y. Kibe, K. Kimura, N. Kimura, E. Komatsu, M. Kozu, K. Koga, A. Lee, H. Matsuhara, S. Mima, K. Mitsuda, K. Mizukami, H. Morii, T. Morishima, M. Nagai, R. Nagata, S. Nakamura, M. Naruse, T. Namikawa, K. Natsume, T. Nishibori, K. Nishijo, H. Nishino, A. Noda, T. Noguchi, H. Ogawa, S. Oguri, I. Ohta, N. Okada, C. Otani, P. Richards, S. Sakai, N. Sato, Y. Sato, Y. Segawa, Y. Sekimoto, K. Shinozaki, H. Sugita, A. Suzuki, T. Suzuki, O. Tajima, S. Takada, S. Takakura, Y. Takei, T. Tomaru, Y. Uzawa, T. Wada, H. Watanabe, Y. Yamada, H. Yamaguchi, N. Yamasaki, M. Yoshida, T. Yoshida, K. Yotsumoto

Proceedings Volume 9143, 91431F (2014) https://doi.org/10.1117/12.2055794

KEYWORDS: Polarization, Satellites, Sensors, Telescopes, Mirrors, Microwave radiation, Antennas, Sun, Calibration, Physics

Read Abstract +

Proceedings Article | 31 May 2013 Paper

Terahertz 3D imaging with a CW source and phase-shifting interferometry

Yoshiaki Sasaki, Chiko Otani, Hiroshi Kasuga, Hitoshi Ohmori, Masayuki Suga, Tetsuya Yuasa

Proceedings Volume 8716, 87160V (2013) https://doi.org/10.1117/12.2017007

KEYWORDS: Terahertz radiation, Computed tomography, Mirrors, Beam splitters, Michelson interferometers, Phase interferometry, Signal detection, Stereoscopy, Diodes

Read Abstract +

Proceedings Article | 21 September 2012 Paper

LiteBIRD: a small satellite for the study of B-mode polarization and inflation from cosmic background radiation detection

M. Hazumi, J. Borrill, Y. Chinone, M. Dobbs, H. Fuke, A. Ghribi, M. Hasegawa, K. Hattori, M. Hattori, W. Holzapfel, Y. Inoue, K. Ishidoshiro, H. Ishino, K. Karatsu, N. Katayama, I. Kawano, A. Kibayashi, Y. Kibe, N. Kimura, K. Koga, E. Komatsu, A. Lee, H. Matsuhara, T. Matsumura, S. Mima, K. Mitsuda, H. Morii, S. Murayama, M. Nagai, R. Nagata, S. Nakamura, K. Natsume, H. Nishino, A. Noda, T. Noguchi, I. Ohta, C. Otani, P. Richards, S. Sakai, N. Sato, Y. Sato, Y. Sekimoto, A. Shimizu, K. Shinozaki, H. Sugita, A. Suzuki, T. Suzuki, O. Tajima, S. Takada, Y. Takagi, Y. Takei, T. Tomaru, Y. Uzawa, H. Watanabe, N. Yamasaki, M. Yoshida, T. Yoshida, K. Yotsumoto

Proceedings Volume 8442, 844219 (2012) https://doi.org/10.1117/12.926743

KEYWORDS: Polarization, Satellites, Microwave radiation, Mirrors, Multiplexing, Bolometers, Semiconducting wafers, Physics, Superconductors, X-rays

Read Abstract +

Proceedings Article | 1 May 2009 Paper

Non-invasive mail inspection system with terahertz radiation

Hiromichi Hoshina, Yoshiaki Sasaki, Aya Hayashi, Chiko Otani, Kodo Kawase

Proceedings Volume 7311, 731103 (2009) https://doi.org/10.1117/12.819306

KEYWORDS: Terahertz radiation, Scattering, Particles, Absorption, Sensors, Inspection, Spectroscopy, Databases, Refractive index, Antennas

Read Abstract +

Proceedings Article | 19 July 2008 Paper

System design of submillimeter-wave imaging array SISCAM

H. Matsuo, Y. Hibi, H. Nagata, M. Nakahashi, Y. Murakoshi, H. Arai, S. Ariyoshi, C. Otani, H. Ikeda, M. Fujiwara

Proceedings Volume 7020, 702015 (2008) https://doi.org/10.1117/12.790615

KEYWORDS: Sensors, Electronics, Staring arrays, Cryogenics, Superconductors, Photodetectors, Imaging arrays, Amplifiers, Optical design, Digital electronics

Read Abstract +

Proceedings Article | 6 July 2006 Paper

Development of superconductive imaging submillimeter-wave camera with nine detector elements (SISCAM-9)

Yuko Mori, Takashi Okaniwa, Misato Nakahashi, Seiichiro Ariyoshi, Chiko Otani, Hiromi Sato, Hiroshi Matsuo

Proceedings Volume 6275, 627523 (2006) https://doi.org/10.1117/12.672632

KEYWORDS: Sensors, Photodetectors, Telescopes, Magnetism, Astronomy, Signal detection, Sensor performance, Quantum efficiency, Liquids, Helium

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Performance of SIS photon detectors for superconductive imaging submillimeter-wave camera (SISCAM)

H. Matsuo, H. Nagata, Y. Mori, J. Kobayashi, T. Okaniwa, T. Yamakura, C. Otani, S. Ariyoshi

Proceedings Volume 6275, 627504 (2006) https://doi.org/10.1117/12.672800

KEYWORDS: Photodetectors, Sensors, Bolometers, Superconductors, Electronics, Staring arrays, Detector development, Telescopes, Magnetism, Cameras

Read Abstract +

Proceedings Article | 3 February 2006 Paper

Terahertz wave parametric sources

S. Hayashi, K. Maki, C. Otani, K. Kawase

Proceedings Volume 5975, 59750N (2006) https://doi.org/10.1117/12.675565

Read Abstract +

Proceedings Article | 16 January 2006 Paper

THz imaging applications

Adrian Dobroiu, Kodo Kawase, Yuichi Ogawa, Masatsugu Yamashita, Chiko Otani

Proceedings Volume 6038, 60380K (2006) https://doi.org/10.1117/12.651350

KEYWORDS: Terahertz radiation, Scattering, Sensors, Absorption, Nonlinear crystals, Photon polarization, Polaritons, Mirrors, Imaging spectroscopy, Oscillators

Read Abstract +

Proceedings Article | 6 December 2005 Paper

Terahertz parametric sources and imaging applications

M. Yamashita, Y. Ogawa, C. Otani, K. Kawase

Proceedings Volume 6050, 60500J (2005) https://doi.org/10.1117/12.656044

KEYWORDS: Terahertz radiation, Crystals, Prisms, Absorption, Polaritons, Nonlinear crystals, Laser crystals, Laser scattering, Imaging spectroscopy, Spectroscopy

Read Abstract +

SPIE Journal Paper | 1 January 2005

Terahertz technique for detection of microleaks in the seal of flexible plastic packages

Yasuyuki Morita, Adrian Dobroiu, Kodo Kawase, Chiko Otani

OE, Vol. 44, Issue 01, 019001, (January 2005) https://doi.org/10.1117/12.10.1117/1.1827222

KEYWORDS: Terahertz radiation, Inspection, Opacity, Millimeter wave sensors, Signal detection, Optical inspection, Absorption, Mirrors, Tungsten, Microscopes

Read Abstract +

Proceedings Article | 8 October 2004 Paper

Design of wide-field submillimeter-wave camera using SIS photon detectors

Hiroshi Matsuo, Seiichiro Ariyoshi, Chiko Otani, Hajime Ezawa, Jun Kobayashi, Yuko Mori, Hirohisa Nagata, Hirohiko Shimizu, Mikio Fujiwara, Makoto Akiba, Iwao Hosako

Proceedings Volume 5498, (2004) https://doi.org/10.1117/12.552550

KEYWORDS: Sensors, Photodetectors, Bolometers, Sapphire, Cryogenics, Cameras, Superconductors, Antennas, Staring arrays, Electronics

Read Abstract +

Proceedings Article | 8 April 2004 Paper

Terahertz direct detector using superconducting tunnel junctions

Chiko Otani, Seiichiro Ariyoshi, Hiroshi Matsuo, Takahiro Morishima, Masatsugu Yamashita, Kodo Kawase, Hiromi Sato, Hirohiko Shimizu

Proceedings Volume 5354, (2004) https://doi.org/10.1117/12.528886

KEYWORDS: Sensors, Terahertz radiation, Superconductors, Antennas, Black bodies, Niobium, Optical filters, Aluminum, Sapphire, Sensor performance

Read Abstract +

Proceedings Article | 18 December 2002 Paper

Conceptual design of a combined visible-x-ray wideband telescope

Yoshiyuki Takizawa, Toshikazu Ebisuzaki, Chico Otani, Hirohiko Shimizu, Yoshiyuki Takahashi

Proceedings Volume 4849, (2002) https://doi.org/10.1117/12.460086

KEYWORDS: Photons, X-rays, Space telescopes, X-ray telescopes, Mirrors, Molybdenum, Silicon, Reflectivity, Telescopes, Visible radiation

Read Abstract +

Proceedings Article | 8 November 2001 Paper

Development of a magnetic lens and prism for cold neutrons and their application to neutron scattering experiments

Takayuki Oku, Tomohiro Adachi, Hiromi Sato, Chico Otani, Yoshiyuki Takizawa, Kenji Sakai, Hirohiko Shimizu, Keita Sasaki, Hirokatsu Iwasa, Takashi Kamiyama, Yoshiaki Kiyanagi, Takashi Ino, Michihiro Furusaka, Junichi Suzuki, Masahiro Hino, Seiji Tasaki, Tohru Ebisawa

Proceedings Volume 4509, (2001) https://doi.org/10.1117/12.448064

KEYWORDS: Magnetism, Prisms, Scattering, Beam controllers, Laser scattering, Sensors, Signal attenuation, Beam shaping, Magnetic sensors, Prototyping

Read Abstract +

Showing 5 of 25 publications

Conference Committee Involvement (7)

Infrared, Millimeter-Wave, and Terahertz Technologies XII

11 October 2025 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies XI

13 October 2024 | Nantong, Jiangsu, China

Infrared, Millimeter-Wave, and Terahertz Technologies VII

12 October 2020 | Online Only, China

Infrared, Millimeter-Wave, and Terahertz Technologies VI

21 October 2019 | Hangzhou, China

Infrared, Millimeter-Wave, and Terahertz Technologies V

12 October 2018 | Beijing, China

Showing 5 of 7 Conference Committees

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years