Article
Optics
Yulu Qin, Boyu Ji, Xiaowei Song, Jingquan Lin
Summary: The plasmonic functional lens achieved wavelength-selective nano-focusing of SPPs via a nano-dichroic element, directing all SPP power of the matched wavelength inward for higher collecting efficiency and focusing intensity.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Mohsen Samadi, Pooya Alibeigloo, Abolfazl Aqhili, Mohammad Ali Khosravi, Farahnaz Saeidi, Shoaib Vasini, Mostafa Ghorbanzadeh, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: Plasmonic tweezers are indispensable tools for manipulating micro and nano-objects with high precision, utilizing surface plasmon technology to trap particles beyond the diffraction limit. Trapping-potential landscape can be reconfigured by designing plasmonic nanostructures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Optics
Victor Pacheco-Pena, Toby Hallam, Noel Healy
Summary: MXenes, as an emerging class of two-dimensional materials, show significant potential for use in next generation optoelectronic sensors. By tuning the plasma frequencies, they can produce plasmon resonances across different spectral ranges, adding a degree of freedom to the sensing mechanism.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Zong-Sian Li, Tsan-Wen Lu, Pin-Ruei Huang, Po-Tsung Lee
Summary: We propose and study a plasmonic bowtie notch design with assisted periodic curved grooves to reduce power consumption in experiments and stably trap polystyrene spheres, which can be helpful in realizing highly efficient nano-tweezers in the plasmonic circuit on-chip.
PHOTONICS RESEARCH
(2021)
Review
Materials Science, Multidisciplinary
Xuanru Zhang, Wen Yi Cui, Yi Lei, Xin Zheng, Jingjing Zhang, Tie Jun Cui
Summary: Localized surface plasmons (LSPs) in metal nanoparticles are highly sensitive to the dielectric environment, making them ideal sensors. The concept has expanded to spoof LSPs in microwave and terahertz frequencies, offering deep-subwavelength confinement and sensitivity enhancement with low loss. Advances in technology have enabled applications in various fields such as liquid sensing, gas sensing, and wearable sensing.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Physical
L. A. M. Al-Sagheer, A. Alshahrie, Waleed E. Mahmoud
Summary: A facile method was reported for preparing high purity gold nanorods, functionalized with mercaptoproponic acid, leading to stable dispersion in water. The aspect ratio of gold nanorods, controlled by reaction time, showed low cytotoxicity with a 4.3 aspect ratio resulting in 92% cell survival. In vivo studies in mice demonstrated progressive tumor reduction and complete disappearance within four weeks after NIR-laser irradiation of mice injected with these nanorods.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Physics, Condensed Matter
Yang Xiao, Hong Zhang
Summary: By designing novel hybrid structures of SiO2 and Ag film, with stable properties and improved performance in the visible region, the absorption spectrum can be modulated by layer spacing to exhibit double absorption peaks. These hybrid structures show promise as valuable candidate materials in the fields of photosensitive detectors, thin-film solar cells, and optical switches.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Guangqing Du, Yu Lu, Dayantha Lankanath, Xun Hou, Feng Chen
Summary: Plasmonic optical tweezers with a symmetry-tunable potential well were investigated based on a heterogeneous model of nano-bowtie antennas made of different noble substances. The study suggests that the plasmonic trapping force around a quantum dot exhibits symmetry-broken characteristics and becomes increasingly asymmetrical with increasing applied laser electric field. The wavelength-dependent plasmonic trapping potential exhibits a two-peak structure for the heterogeneous Au-Ag bowtie dimer compared to a single-peak trapping potential of the Au-Au bowtie dimer.
Article
Chemistry, Multidisciplinary
Jiacheng Yao, Hui Fang, Yong Li, Ze Liu, Hongxing Xu, Tao Ding
Summary: In this study, single-crystalline aluminum nanowires with high stability were fabricated using a superplastic nanomolding technique. These nanowires exhibit multimode waveguiding, efficient beam splitting based on polarization, and durable thermal optical modulation, making them suitable for nanophotonic routers, splitters, and information encryptors. This technique can also be extended to other metals, enhancing the development of functional nanophotonic devices and integrated optical chips.
Article
Optics
Saumya Choudhary, Robert W. Boyd, J. E. Sipe
Summary: Several plasmonic nanoparticles can couple to form nonradiative dark and radiative bright modes through radiative coupling. We develop an analytical model to explain the formation of these modes in bilayers consisting of dipolar nanoantenna arrays. Our model includes near-field contributions and shows good agreement with finite-difference time-domain simulation results. Changing the material and geometrical parameters can vary the reflection and absorption spectra of the bilayers, making them useful for designing efficient spectral filters. By adjusting the phase between two counterpropagating normally incident fields, we can selectively excite these modes, which has applications in all-optical modulators and switches based on linear interferometric effects.
Article
Engineering, Electrical & Electronic
Zhendong Yan, Xue Lu, Kai Chen, Zhongquan Lv, Xingting Pu, Chaojun Tang, Pinggen Cai
Summary: By placing the 3D metamaterial of Au VSRRs directly onto the Au substrate, ultra-narrow dual-band perfect absorption in the visible range for high-sensitivity sensing can be achieved. The proposed 3D metamaterial exhibits ultrahigh sensitivity and figure of merit in the near-infrared regime, holding potential applications in label-free biosensing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Arumona Edward Arumona, Krzysztof M. Czajkowski, Tomasz J. Antosiewicz
Summary: In this study, hyperbolic nanoresonators composed of anisotropic materials were investigated for their unique optical properties. The tunability of the optical resonances and the interplay between shape and material anisotropy in determining the spectral response were demonstrated. The quasistatic magnetic response of the nanoresonators revealed a material-dependent origin of the mode.
Article
Optics
Da-Jie Yang, Song-Jin Im, Hai-Wen Huang, Chol-Song Ri, Kum-Dong Kim, Kil-Song Song, Ji-Cai Liu, Qu-Quan Wang
Summary: This paper reveals the effects of structured light carrying orbital angular momentum (OAM) on surface plasmons, showing anomalous plasmon excitations and couplings under OAM beams. The excitation of single particles is determined by both photon spin angular momentum (SAM) and OAM, and is influenced by particle locations. Fano resonance is observed in a nanorod dimer, with one rod aligned along light propagation direction as the bright mode and the other aligned along global polarization direction as the dark mode.
PHOTONICS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Amit Sangwan, Josep Miquel Jornet
Summary: With advancements in nanotechnology, novel nanosensing technologies are crucial in today's society, with plasmonic sensing showing unprecedented reliability and resolution. By combining plasmonic sensing with nanoscale communication, a concept of joint nanoscale communication and bio-sensing systems can be achieved for more accurate diagnoses and reduced load on medical testing infrastructure. The proposed system models changes in frequency response of biofunctionalized plasmonic nanoantennas, utilizes a chirp-spread spectrum excitation and detection system, and presents numerical results to demonstrate performance.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2022)
Article
Optics
Sungho Choi, Jongkyoon Park, Soo hoon Chew, Tsendsuren Khurelbaatar, Alexander Gliserin, Seungchul Kim, Dong eon Kim
Summary: In this study, the polarization-dependent surface plasmon resonance in bowtie nano-aperture arrays is experimentally investigated. The transmission spectra exhibit a nonlinear redshift for vertically polarized light as the gap size of the nanoaperture decreases, while the spectra remain unchanged for horizontally polarized light. Simulated charge and current distributions provide insight into the underlying mechanisms, and these findings are supported by photoemission electron microscopy.
Article
Chemistry, Multidisciplinary
Tomoya Oshikiri, Haruki Jo, Xu Shi, Hiroaki Misawa
Summary: This study utilized the concept of modal strong coupling between metal nanoparticles and a nanocavity to enhance the efficiency of hot-hole injection. The results showed that the hybrid modes of the modal strong coupling system promoted hot-hole injection and proton/water reduction by hot electrons over a broad wavelength range.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yusuke Ueda, Yusuke Masuda, Tomohiro Iwai, Keisuke Imaeda, Hiroki Takeuchi, Kosei Ueno, Min Gao, Jun-ya Hasegawa, Masaya Sawamura
Summary: We present a copper-catalyzed enantioselective umpolung allylic acylation reaction under visible light. The reaction involves the use of acylsilanes as acyl anion equivalents and is supported by triplet-quenching experiments and DFT calculations. The reaction mechanism involves a charge-separated triplet state intermediate generated by copper-to-acyl metal-to-ligand charge transfer photoexcitation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Optics
Yoshiaki Nishijima, Naoki To, Armandas Balcytis, Saulius Juodkazis
Summary: This study conducted a detailed spectral analysis of the radiation absorption and scattering behaviors of metasurfaces through photonic simulations. It was found that the absorbance and scattering cross-sections exhibit a ratio of 1 at the absorption peak spectral position. By increasing the absorption through optical materials, the total absorption efficiency can be controlled, leading to near-perfect absorption and emission of thermal radiation.
Article
Materials Science, Multidisciplinary
Yoshiaki Nishijima, Shinya Morimoto, Armandas Balcytis, Tomoki Hashizume, Ryosuke Matsubara, Atsushi Kubono, Naoki To, Meguya Ryu, Junko Morikawa, Saulius Juodkazis
Summary: Spectrally selective narrowband mid-infrared radiation absorbance and thermal emittance were achieved through mode coupling between a plasmonic metal-insulator-metal (MIM) metasurface and molecular vibrational mode resonances, with coupling efficiency ranging from approximately 3.9% to 6.6%. Experimentally observed pronounced resonant coupling behavior was well described by finite-difference time-domain simulations, indicating a new paradigm in photo-thermal energy conversion.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Hiroki Ago, Susumu Okada, Yasumitsu Miyata, Kazunari Matsuda, Mikito Koshino, Kosei Ueno, Kosuke Nagashio
Summary: The past decades of materials science discoveries have laid the foundation for our present society. The recent discovery of graphene and other 2D materials offers a novel approach to synthesizing materials and exploring new physics and chemistry.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chiaki Kojima, Akemi Noguchi, Tatsuya Nagai, Ken-ichi Yuyama, Sho Fujii, Kosei Ueno, Nobuaki Oyamada, Kei Murakoshi, Tatsuya Shoji, Yasuyuki Tsuboi
Summary: Membrane fusion is an important and ubiquitous process in living organisms. This study developed a novel method for liposome fusion based on laser-induced bubble generation on gold surfaces, creating ultralong tubes similar to sea anemones. The behavior of the tubes was monitored using fluorescence microscopy, and the generation of these tubes was discussed in relation to Marangoni convection and thermophoresis.
Article
Multidisciplinary Sciences
Pedro Paulo Ferreira da Rosa, Yuichi Kitagawa, Sunao Shoji, Hironaga Oyama, Keisuke Imaeda, Naofumi Nakayama, Koji Fushimi, Hidehiro Uekusa, Kosei Ueno, Hitoshi Goto, Yasuchika Hasegawa
Summary: Soft-crystal copolymerization of Tb(III) and Dy(III) complexes is achieved, and long-range energy transfer from one crystal to the other is studied.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Yoshiaki Nishijima, Syunya Kimura, Yu Takeshima, Saulius Juodkazis
Summary: Control of light absorption and transmission by metal-insulator-metal (MIM) metasurfaces has potential applications in optical windows. This study demonstrates the use of MIM metasurfaces with thin metal substrate and Indium-Tin-Oxide (ITO) for photo-thermal energy conversion and radiative cooling. The high transparency of ITO in visible wavelengths and high absorption at mid-infrared wavelengths make it suitable for efficient cooling or heating in living and working spaces. The patterning of the MIM (ITO/CaF2/ITO) metasurface using low-resolution photo-lithography shows simplification and scalability for practical window applications.
Article
Chemistry, Multidisciplinary
Yaguang Wang, Xu Shi, Tomoya Oshikiri, Hiroaki Misawa
Summary: We fabricated a novel photoanode structure that efficiently enhances light absorption and electron transfer through modal strong coupling, enabling water splitting at zero bias potential.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Xiaoqian Zang, Xu Shi, Yoshiki Suganami, Yen-En Liu, Tomoya Oshikiri, Hiroaki Misawa
Summary: In this study, a strong coupling photoelectrode with localized surface plasmon resonance (LSPR) and Fabry-Perot (FP) nanocavity was fabricated to investigate the enhancement mechanism of plasmon-induced chemical reactions. The efficient water oxidation on the strong coupling electrode was considered a result of quantum coherence between the Au-Ag alloy nanoparticles through the nanocavity. In situ electrochemical surface-enhanced Raman spectroscopy was used to detect the intermediates of water oxidation and showed a more negative onset potential on the strong coupling electrode.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Chih-Hao Huang, Ya-Chiao Lee, Tetsuhiro Kudo, Xu Shi, Kosei Ueno, Teruki Sugiyama, Hiroaki Misawa, Hiroshi Masuhara
Summary: In this study, optical trapping with fabricated gold nanodisk arrangement was used to observe the trapping and arrangement of gold nanoparticles between the nanodisks, as well as the bidirectional and unidirectional swarming behavior of the nanoparticles. These findings provide valuable insights into optical manipulation techniques coupled with fabricated nanostructures, expanding the possibilities for optical trapping and related research.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Bhagyashree Mahesha Sachith, Zhijing Zhang, Palyam Subramanyam, Challapalli Subrahmanyam, Akihiro Furube, Naoto Tamai, Takuya Okamoto, Hiroaki Misawa, Vasudevanpillai Biju
Summary: Bandgap-engineered inorganic and hybrid halide perovskite materials have shown great promise for solar cells, but fluctuations in the photoinduced electron transfer (PET) rates can affect their performance. In this study, we investigated the fluctuations of interfacial PET in perovskite-based donor-acceptor systems at both single-particle and ensemble levels. By analyzing the Gibbs free energy changes and studying the dynamics of PET, we gained insights into the charge separation mechanisms in these systems. Our findings provide valuable information for optimizing the design and performance of perovskite solar cells.
Article
Chemistry, Physical
Ryu Meguya, Soon Hock Ng, Molong Han, Vijayakumar Anand, Tomas Katkus, Jitraporn Vongsvivut, Dominique Appadoo, Yoshiaki Nishijima, Saulius Juodkazis, Junko Morikawa
Summary: Polarisation analysis of light-matter interactions has been extended into the evanescent field using an attenuated total reflection setup and a synchrotron source at THz frequencies. This study demonstrates the absorbance analysis of the linearly polarised incident light in the evanescent field through the use of scalar intensity E-2. The anisotropy in the absorption-dispersion properties of the sample probed by the evanescent optical near-field is revealed, and a four-polarisation method is presented for absorbance mapping.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Analytical
Yoshiaki Nishijima
Summary: This comprehensive paper summarizes the global trends of mid-infrared plasmonic materials and related researches, which focus on developing new materials for building breakthrough sensors and detectors in the mid-infrared range.
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
