Article
Materials Science, Multidisciplinary
Zhibin Ren, Ruyue Liu, Yichao Zhang, Tianxin Liu, Fengyi Li, Xiaoling Hong, Yue Guo
Summary: A nonpolarizing narrow band metamaterial transmission filter based on EIT at visible wavelengths is demonstrated, with improved hardness by connecting two resonance components with a SiO2 film layer and a glass substrate. Theoretical results are validated by measurement, showing good agreement with simulation spectra. The physical mechanism is further illustrated through calculated electric field distributions.
Article
Materials Science, Multidisciplinary
Yue Liu, Yu-Yao Cheng, Wen-Zhuang Ma, Yong-Chang Wu, Dan Meng, Yu-Shan Chen, Jing Liu, Yu Gu
Summary: This study developed a multiband metamaterial-absorbing device using an array of gold nano-crosses to absorb visible to near-infrared wavelengths. The device achieved five-band absorption in the 700-3000 nm range, with three peaks reaching 99% absorption and an average absorption of 96.4% after parameter adjustment and optimization. The device also functioned as a biosensor for virus identification and showed potential for designing ideal absorbers and nanosensors.
RESULTS IN PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Hang Chen, Jianan Feng, Minwei Jiang, Yiqun Wang, Jie Lin, Jiubin Tan, Peng Jin
Summary: This study extends the diffractive deep neural network (DNN)-N-2 to visible wavelengths and proposes a general theory to solve contradictions between wavelength, neuron size, and fabrication limitations. The novel visible light (DNN)-N-2 classifier successfully recognizes handwritten digits and altered targets.
Article
Chemistry, Analytical
Cai-Feng Shi, Bo Zheng, Jian Li, Yue Zhou, Hai-Ling Liu, Saud Asif Ahmed, Kang Wang, Xing-Hua Xia
Summary: The study introduces an ultrabroadband plasmonic metamaterial absorber that can absorb 99% of incident light energy and excite plasmon resonance from ultraviolet to near-infrared range, enabling efficient plasmon-enhanced Raman scattering. The absorber exhibits high PERS performance with a detection limit of down to 10^(-12) M and excellent uniformity and reproducibility under various excitation sources, suggesting potential for cost-effective high-throughput production.
ANALYTICAL CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Meng-Hsin Chen, Cheng-Wei Yen, Chia-Chun Guo, Vin-Cent Su, Chieh-Hsiung Kuan, Hoang Yan Lin
Summary: The study introduces a new design of high-efficiency metalenses using hexagon-resonated elements to achieve high performance and polarization insensitivity. By choosing metalenses at the desired wavelength, it is possible to efficiently observe the structures on patterned substrates, avoiding the need for expensive equipment.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Guozhen Liang, Heqing Huang, Aseema Mohanty, Min Chul Shin, Xingchen Ji, Michael Joseph Carter, Sajan Shrestha, Michal Lipson, Nanfang Yu
Summary: The study presents visible-spectrum silicon nitride thermo-optic phase modulators based on adiabatic micro-ring resonators, which offer a one-order-of-magnitude reduction in both device footprint and power consumption compared to waveguide phase modulators. These modulators provide 1.6 pi phase modulation with minimal amplitude variations and improved robustness against fabrication variations.
Article
Chemistry, Analytical
Srijan Datta, Saptarshi Mukherjee, Xiaodong Shi, Mahmood Haq, Yiming Deng, Lalita Udpa, Edward Rothwell
Summary: This paper introduces the design and application of a metamaterial lens in microwave imaging and nondestructive evaluation. Experimental results demonstrate that the metamaterial lens combined with a microwave system can achieve high sensitivity detection of subwavelength defects.
Article
Chemistry, Multidisciplinary
Tian Tian, Yuheng Chen, Jie Zhang, Shuolin Wang, Wen Yuan, Hongde Liu, Yaoqing Chu, Chengling Mao, Wenjie Xu, Dahuai Zheng, Jiayue Xu
Summary: A series of uranium-doped lithium niobate crystals (LN:U) were grown by the modified vertical Bridgman method, and their photorefractive properties in the visible band were systematically investigated for the first time. The occupancy of uranium ions and photorefractive centers is discussed. LN:U achieves multi-wavelength holography.
Article
Chemistry, Multidisciplinary
Byeongho Park, Yeon Kyung Cha, Jisung Kwak, Kyeong Seob Hwang, Hyo-Suk Kim, Subeen Park, Yusin Pak, Tai Hyun Park, Hyun Seok Song, Jae Hun Kim
Summary: This study investigates the refractive index and nonlinear properties of two types of photosensitive nanodiscs and demonstrates the modulation of optical signals using these artificial photoreceptor-based waveguides, providing insights into the functioning of visual cells.
Article
Chemistry, Multidisciplinary
Xinzhi Zheng, Yujie Ma, Chenxi Zhao, Bingxi Xiang, Mingyang Yu, Yanmeng Dai, Fang Xu, Jinman Lv, Fei Lu, Cangtao Zhou, Shuangchen Ruan
Summary: This paper investigates a new polarization-splitting mechanism based on the energy distributions of the fundamental polarized modes in the r-TiO2 ridge waveguide. The bending losses for different bending radii and the optical coupling properties of the fundamental modes in different r-TiO2 ridge waveguide configurations are analyzed. A polarization splitter with high extinction ratio operating at visible wavelengths based on directional couplers (DCs) in the r-TiO2 ridge waveguide is proposed. Polarization-selective filters based on micro-ring resonators (MRRs) with resonances of only TE or TM polarizations are designed and operated. The results show that polarization splitters for visible wavelengths with high extinction ratio in DC or MRR configurations can be achieved with a simple r-TiO2 ridge waveguide structure.
Article
Nanoscience & Nanotechnology
Hanlyun Cho, Younghwan Yang, Dasol Lee, Sunae So, Junsuk Rho
Summary: This paper presents a vertically stacked metal-dielectric multilayer vertical hyperbolic metamaterial (vHMM) that operates in the visible spectrum. The research explores the relationship between negative refraction and effective permittivity, specifically focusing on the importance of the loss tangent in generating negative refraction. The designed vHMM exhibits negative refraction in the wavelengths between 450 and 550 nm, reaching the largest negative refraction at 500 nm wavelength.
Article
Optics
K. A. Hallman, L. Rodriguez-Sune, J. Trull, C. Cojocaru, M. A. Vincenti, N. Akozbek, R. Vilaseca, M. Scalora
Summary: Nonlinear silicon photonics offers unique abilities to generate, manipulate, and detect optical signals in nano-devices. The inefficiency of nonlinear processes, absorption, and the lack of realistic models have been limiting the nano-engineering of silicon. This study presents measurements of second and third harmonic generation from undoped silicon membranes, providing insights into the nonlinear optical properties of complex structures and the potential of exploiting nonlinear dispersion of semiconductors.
Article
Nanoscience & Nanotechnology
Yue Yu, Lai Wang, Xiankai Sun
Summary: The study explored the acousto-optic effect of lithium niobate on a chip at near-visible wavelengths, demonstrating acousto-optic modulation with a modulation frequency up to 2.44 GHz. The device fabrication used an etchless process and the optimization of device performance was achieved by applying the principle of bound states in the continuum.
Article
Nanoscience & Nanotechnology
Qijian Jin, Gaofeng Liang, Weijie Kong, Ling Liu, Zhongquan Wen, Yi Zhou, Changtao Wang, Gang Chen, Xiangang Luo
Summary: This study presents a negative index metamaterial (NIM) made of stacked plasmonic waveguides, which enables negative refractions in the ultraviolet range. The experimental results demonstrate that this NIM can be used in subwavelength photolithography to extend the working distance and reproduce patterns with specific feature sizes.
Article
Materials Science, Multidisciplinary
Babak Vosoughi Lahijani, Nicolas Descharmes, Raphael Barbey, Gael D. Osowiecki, Valentin J. Wittwer, Olga Razskazovskaya, Thomas Sudmeyer, Hans Peter Herzig
Summary: This article investigates the propagation properties of optical modes supported at the free surface of a 1D photonic crystal. Structures optimized for long-distance propagation of optical surface waves are designed and fabricated, and the existence of optical surface waves in the visible spectral range is experimentally demonstrated for the first time.
ADVANCED OPTICAL MATERIALS
(2022)
