Article
Chemistry, Physical
Inyong Hwang, Mingyun Kim, Jaeyeon Yu, Jihye Lee, Jun-Hyuk Choi, Su A. Park, Won Seok Chang, Jongwon Lee, Joo-Yun Jung
Summary: SEIRA spectroscopy utilizes near-field effects in nanostructures for highly sensitive detection, with a 10 nm thick MA achieving a record-high reflection difference SEIRA signal in experiments. MAs can be mass-produced through nanoimprint lithography and dry etching, offering a promising technological pathway for sensing and detection applications.
Article
Optics
Baoqing Wang, Cuiping Ma, Peng Yu, Alexander O. Govorov, Hongxing Xu, Wenhao Wang, Lucas V. Besteiro, Zhimin Jing, Peihang LI, Zhiming Wang
Summary: In this work, an ultra-broadband nanowire metamaterial absorber composed of vertically aligned dielectric nanowires with coaxial metallic rings is proposed. The absorber exhibits strong absorption from 0.2 to 7 μm wavelength range, making it suitable for various applications.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Ehab Awad
Summary: Graphene is a promising material for infrared applications, but standalone monolayer graphene has low infrared absorption. In this study, a novel graphene metamaterial embedded inside a Bundt optical-antenna is introduced, which significantly enhances the infrared absorption of graphene and covers a wide range of optical communication bands.
Article
Nanoscience & Nanotechnology
Jin Tao, Zhongzhu Liang, Guang Zeng, Dejia Meng, David R. Smith, Qing Huo Liu, Qingrui Yang, Menglun Zhang, Wei Pang, Jingqiu Liang, Tarik Bourouina
Summary: By integrating a perfect metamaterial absorber (PMA) with a film bulk acoustic wave resonator (FBAR) in a monolithic fashion, ultracompact uncooled infrared sensors of high sensitivity were produced. The resonance frequency of FBAR can be efficiently used as a sensor output, and the resulting sensor achieves a high absorption of 88% for an infrared spectrum centered at a wavelength of 8.2 μm.
Article
Chemistry, Multidisciplinary
Yang Wang, Yue Gu, Ailiang Cui, Qing Li, Ting He, Kun Zhang, Zhen Wang, Ziping Li, Zhenhan Zhang, Peisong Wu, Runzhang Xie, Fang Wang, Peng Wang, Chongxin Shan, Hua Li, Zhenhua Ye, Peng Zhou, Weida Hu
Summary: Uncooled infrared photodetectors have drawn attention for their low cost and compact detection systems, but typically have slow response times. This study explores a van der Waals heterojunction on epitaxial HgCdTe for uncooled mid-wavelength infrared photodetection, achieving fast response times and high detectivity.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ahmed S. Saadeldin, Amr M. Sayed, Adnan M. Amr, Menna O. Sayed, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: An ultrathin and broadband metamaterial absorber with loaded four lumped resistors is proposed and analyzed in this study. The absorptivity is increased by simultaneously reducing the reflection and transmission coefficients. The proposed design utilizes continuous metallic ground to achieve zero transmission and matches the impedance with free space to reduce reflection. It demonstrates electric and magnetic resonances with perfect absorptivity. The suggested absorber exhibits high absorption over a wide frequency range and incident angle variation, making it suitable for applications in communications, stealth, and imaging fields.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Jing-Wen Wu, Wenya Xu, Yuanzhen Li, Yue-Feng Liu, Fei Gao, Wenming Su, Su Xu, Hong-Bo Sun
Summary: This study experimentally demonstrates a single-period metamaterial absorber with multi-wavelength infrared thin-film material absorption, prepared through photolithography process, which can be used to measure the complex refractive index of coating thin film at different wavelengths.
Article
Engineering, Multidisciplinary
Jing-Wen Wu, Wenya Xu, Yuanzhen Li, Yue-Feng Liu, Fei Gao, Wenming Su, Su Xu, Hong-Bo Sun
Summary: An experimentally demonstrated metamaterial with polarization-insensitive multi-wavelength absorption for infrared thin-film material measurement shows sensitivity to the dielectric property of the coating thin-film material. The proposed absorber can retrieve the complex refractive index of coating thin film at various wavelengths, providing a convenient way to measure refractive indices at both mid-infrared and far-infrared regimes.
Article
Engineering, Electrical & Electronic
Junsung Park, Mohammad M. Al Mahfuz, Rock Huebner, Dong-Kyun Ko
Summary: Low-cost, uncooled photodetectors operating in the MWIR and LWIR spectral regions have wide applications and can dominate the future infrared market. Lead selenide (PbSe) has attracted research interest due to its low manufacturing cost and favorable properties. This study reports on MWIR photoconductive film derived from colloidal PbSe nanocrystals, demonstrating high sensitization and potential for future digital additive manufacturing of infrared sensors and imagers.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jochen Vanderspikken, Quan Liu, Zhen Liu, Tom Vandermeeren, Tom Cardeynaels, Sam Gielen, Bruno Van Mele, Niko Van den Brande, Benoit Champagne, Koen Vandewal, Wouter Maes
Summary: This research explores the enhancement of charge transfer absorption by altering the side chains of organic semiconductor donor polymers, thereby increasing the interfacial area between the polymer and fullerene. This improvement extends the detection range and performance of organic narrow-band photodetectors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Amr M. Mahros, Yara Alharbi
Summary: In this paper, the characteristics of a plasmonic metamaterial absorber based on a metal-insulator-metal functional stack are presented and explored. The impact of modifying nano-hole and embedded disc diameters on the absorber's performance is investigated. The proposed absorber structure shows high absorption rate and short circuit current density, and can be tailored to absorption spectra.
Article
Chemistry, Physical
Marwa M. Tharwat, Abdulaziz R. Alsulami, Amr M. Mahros
Summary: This paper investigates the absorption spectra of a plasmonic metamaterial absorber in the visible and near-infrared regimes. The results show that the absorption bandwidth and spectral ratio can be tailored by modifying the structural parameters. It is also found that the shape of the structure and the glass coating can affect the bandwidth expansion.
Article
Materials Science, Multidisciplinary
Le Wei, Jingjing Qian, Liang Dong, Meng Lu
Summary: A wavelength-selective pyroelectric sensor based on a graphene field-effect transistor (gFET) with a plasmon-enhanced pyroelectric gate (PG) is presented in this study. By incorporating gold nanorods (AuNRs) or silver nanoparticles (AgNPs) into the poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) membrane, the photothermal conversion efficiency of PVDF-TrFE in a specific narrowband wavelength range is enhanced. The PG-gFET can selectively respond to different light wavelengths, benefiting fields such as pyroelectric sensors, spectroscopy, and imaging.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Marco Vallone, Alberto Tibaldi, Stefan Hanna, Anne Wegmann, Detlef Eich, Heinrich Figgemeier, Francesco Bertazzi, Giovanni Ghione, Michele Goano
Summary: Multiphysics modeling is used to analyze the role of surface plasmon-polaritons observed in gold nanorods arranged on the illuminated face of a planar HgCdTe-based mid-wavelength infrared focal plane array. The simulations show that the proposed plasmonic detector with a 1 μm-thick absorber layer significantly reduces diffusive inter-pixel crosstalk compared to conventional non-plasmonic detectors with a 5 μm-thick absorber layer, without compromising responsivity. Additionally, the plasmonic detector achieves increased detectivity in the entire MWIR band by taking advantage of the reduced absorber volume.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Quanquan Guo, Xiaoyu Wu, Xuexin Duan, Shan He, Wei Pang, Yanyan Wang
Summary: The study introduces a high-performance uncooled near-infrared detector with a giga hertz solidly mounted resonator and gold nanorods arrays. Both simulation and experimentation demonstrate significantly enhanced optical responsive sensitivity to near-infrared, opening new directions in the development of novel miniaturized, tunable NIR detectors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Shinpei Ogawa, Shoichiro Fukushima, Masaaki Shimatani
Summary: The study found that embedded hexagonal boron nitride in metallic nanoslits exhibits extraordinary optical transmission phenomena in the infrared spectrum, attributed to the hybridization of HPPs and SPRs. The calculated electric field distribution indicates that the phenomenon is due to the unique resonance induced by the hybridization of HPPs and SPRs.
Article
Materials Science, Multidisciplinary
Masaaki Shimatani, Takashi Ikuta, Yuri Sakamoto, Shoichiro Fukushima, Shinpei Ogawa, Kenzo Maehashi
Summary: In this study, turbostratic stacked chemical vapor deposition (CVD) graphene was employed to develop a mid-wavelength infrared (MWIR) photodetector, which showed enhanced performance compared to conventional single-layer graphene photodetectors. This research may contribute to the realization of low-cost, mass-producible graphene-based infrared sensors.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Shoichiro Fukushima, Satoru Fukamachi, Masaaki Shimatani, Kenji Kawahara, Hiroki Ago, Shinpei Ogawa
Summary: This study presents graphene-based deep-ultraviolet photodetectors using chemical vapor deposition hexagonal boron nitride photogating. The incorporation of h-BN as a photosensitizer significantly improves the photoresponse and achieves a high responsivity under 260 nm light.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Optics
Shinpei Ogawa, Shoichiro Fukushima, Masaaki Shimatani
Summary: Graphene has potential applications in optoelectronic devices, but its photodetectors face challenges in carrier mobility and absorption. This study proposes a plasmonic metasurface based on hBN/graphene van derWaals heterostructure for wavelength-selective infrared photodetectors. The structure preserves graphene's high carrier mobility and enhances its absorption through localized surface plasmon resonance.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Review
Chemistry, Physical
Shinpei Ogawa, Shoichiro Fukushima, Masaaki Shimatani
Summary: Hexagonal boron nitride (hBN) is a key two-dimensional material that provides an ideal substrate for graphene. It has unique properties in the deep ultraviolet (DUV) and infrared (IR) wavelength bands, making it suitable for various photonic devices. This review discusses the physical properties and applications of hBN-based photonic devices in the DUV and IR wavelength regions, including light-emitting diodes, photodetectors, absorbers/emitters, hyperlenses, and enhanced absorption microscopy.
Article
Optics
Masaaki Shimatani, Shoichiro Fukushima, Manabu Iwakawa, Shinpei Ogawa
Summary: This study investigated the mechanism of graphene photogated diodes and demonstrated that a thin interfacial oxide layer is responsible for the reduction in Fermi level induced by photogating, resulting in an extraordinarily large output current in diodes with a barrier layer.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Shinpei Ogawa, Masaaki Shimatani, Shoichiro Fukushima
Summary: Graphene is a promising material for infrared photodetectors due to its high carrier mobility, broadband photoresponse, and low manufacturing cost. This study presents the development of high-performance graphene-based infrared photodetectors using field-effect transistors and graphene/semiconductor heterojunction structures. The results demonstrate high responsivity and low dark currents, which can contribute to the development of high-performance graphene-based infrared image sensors.
QUANTUM SENSING AND NANO ELECTRONICS AND PHOTONICS XVIII
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Shinpei Ogawa, Shoichiro Fukushima, Satoshi Okuda, Masaaki Shimatani
Summary: Graphene, an atomically thin carbon-based material with a two-dimensional hexagonal lattice structure, displays unique electronic and optical properties. Photodetectors utilizing graphene with a photosensitive layer such as graphene nanoribbons have shown enhanced performance in the mid- and long-wavelength infrared regions, contributing to the advancement of high-performance broadband infrared photodetectors.
INFRARED TECHNOLOGY AND APPLICATIONS XLVII
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Shinpei Ogawa, Shoichiro Fukushima, Masaaki Shimatani, Masafumi Kimata
Summary: In this study, a metal-insulator-metal (MIM) structure incorporating a nanoslit for infrared (IR) rectification is proposed. Wavelength selective detection can be achieved by controlling the slit width or depth. Fabrication procedures using gold electroplating and chemical mechanical polishing (CMP) have been developed for these structures.
INFRARED TECHNOLOGY AND APPLICATIONS XLVII
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Masaaki Shimatani, Takashi Ikuta, Yuri Sakamoto, Shoichiro Fukushima, Satoshi Okuda, Shinpei Ogawa, Kenzo Maehashi
Summary: This study explored the fabrication and performance of highly responsive photodetectors using turbostratic stacked graphene produced by chemical vapor deposition (CVD) and the photogating effect. The results showed that turbostratic stacked CVD graphene can improve the responsivity of photodetectors and contribute to the realization of low-cost, mass-produceable high-responsivity infrared sensors.
INFRARED TECHNOLOGY AND APPLICATIONS XLVII
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Shoichiro Fukushima, Masaaki Shimatani, Satoshi Okuda, Shinpei Ogawa
Summary: The study demonstrates the properties of small-format graphene infrared array sensors, showing high responsivity of graphene FETs under MWIR light irradiation and enhanced MWIR photoresponse through photogating. In comparison, the SBDs exhibited improved dark current characteristics.
INFRARED TECHNOLOGY AND APPLICATIONS XLVII
(2021)
Proceedings Paper
Optics
Shoichiro Fukushima, Masaaki Shimatani, Satoshi Okuda, Shinpei Ogawa, Yasushi Kanai, Takao Ono, Koichi Inoue, Kazuhiko Matsumoto
INFRARED TECHNOLOGY AND APPLICATIONS XLVI
(2020)
Proceedings Paper
Optics
Shinpei Ogawa, Shoichiro Fukushima, Masafumi Kimata
INFRARED TECHNOLOGY AND APPLICATIONS XLVI
(2020)
Proceedings Paper
Optics
Shinpei Ogawa, Masaaki Shimatani, Shoichiro Fukushima, Satoshi Okuda, Masafumi Kimata
INFRARED TECHNOLOGY AND APPLICATIONS XLVI
(2020)
Proceedings Paper
Optics
Satoshi Okuda, Masaaki Shimatani, Shoichiro Fukushima, Shinpei Ogawa, Takashi Ikuta, Kenzo Maehashi
INFRARED TECHNOLOGY AND APPLICATIONS XLVI
(2020)