Article
Chemistry, Multidisciplinary
Maximilian Ochs, Luka Zurak, Enno Krauss, Jessica Meier, Monika Emmerling, Rene Kullock, Bert Hecht
Summary: This study demonstrates the selective electrical excitation of symmetric and antisymmetric plasmonic modes in a two-wire transmission line. Mode selectivity is achieved by precisely positioning nanoscale excitation sources. The resulting device represents the smallest electrically driven light source with directly switchable polarization states.
Article
Chemistry, Physical
Bartosz Janaszek, Anna Tyszka-Zawadzka, Pawel Szczepanski
Summary: This study investigates the impact of spatial dispersion on propagation properties of planar waveguides with hyperbolic metamaterial (HMM) core layer. By altering the dimensions of the unit cells, new effects such as mode degeneration, power flow inversion, propagation gap, and plasmonic-like modes were observed. Additionally, unique characteristic points for high-beta TM mode were reported for the first time, showing power flow approaching zero and mode stopping at a specific waveguide width.
Article
Crystallography
Yaoxian Zheng, Fahim Khan, Barkathulla Asrafali, Qiong Wang, Jihong Ma, Yanyu Chen
Summary: This study introduces an innovative integration of hyperbolic metamaterials (HMMs) and photonic crystals (PtCs) to manipulate light propagation effectively. The proposed HMM PtC waveguide demonstrates excellent absorption and transmission characteristics, achieving a higher sensitivity and FOM compared to traditional surface plasmonic sensors. The direct coupling between surface plasmonics and waveguide modes presents vast potential for photonic sensing applications.
Article
Engineering, Electrical & Electronic
Jan Barowski, Lisa Schmitt, Kristof Kother, Martin Hoffmann
Summary: This contribution presents a design approach and characterization results for dielectric slot waveguides in highly resistive silicon for operation in the terahertz frequency range. The authors discuss the fundamentals and figures of merit of dielectric slot waveguides and present analytical solutions and numerical results from field simulations. Prototypes are fabricated using a process for HR-Si MEMSs, including a silicon-based metamaterial for mechanical support. The devices are measured and characterized using VNA-based two-port measurements, and the obtained losses are reported for the first time.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Nanoscience & Nanotechnology
Tong-Biao Wang, Ying Zhou, Hong-Qian Mu, Khurram Shehzad, De-Jian Zhang, Wen-Xing Liu, Tian-Bao Yu, Qing-Hua Liao
Summary: The lateral Casimir force acting on a 50 nm particle near hyperbolic metamaterial can be enhanced nearly four times compared to that near SiC bulk. This enhancement is caused by the coupling between the resonance mode excited by nanoparticles and the hyperbolic mode supported by hyperbolic metamaterial, providing an efficient method to enhance the interaction of nanoscale objects.
Article
Nanoscience & Nanotechnology
Sheng-Qing Zhu, Yi Zhang
Summary: This theoretical study investigates the electromagnetic forces acting on a spherical anisotropic nanoparticle characterized by multilayer hyperbolic metamaterials (mHMMs). The study finds that the optical gradient force can be flexibly tuned by changing the incident angle of illuminating plane light wave, and the optical torque can be controlled by adjusting the incident angle of circularly polarized plane light and the filling factor of the nanoparticle. Additionally, a new method to enhance vacuum friction torque is proposed through designing the filling factor of the rotating nanoparticle.
Article
Physics, Applied
L. A. Tepanecatl Fuentes, I. Fuentecilla-Carcamo, J. M. Gutierrez-Villarreal, Jorge A. Gaspar-Armenta, M. A. Palomino-Ovando, G. Hernandez-Cocoletzi
Summary: This research demonstrates that a THz reflector consisting of a phosphorene (graphene)-dielectric multilayer can be analyzed using a simple effective plasma frequency model. The cutoff frequency is shown to be influenced by structural parameters and carrier density of phosphorene (graphene) layers, allowing for variability through carrier density tuning. The study also reveals a wide frequency range in the THz domain where cutoff frequency can be adjusted through carrier density tuning, enabling the design of tunable reflectors in these frequencies.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Yaoxian Zheng, Qiong Wang, Mi Lin, Zhengbiao Ouyang
Summary: This study numerically investigates light propagation in photonic crystal membranes containing hyperbolic metamaterials. The results show that hyperbolic metamaterials can improve tunability and self-collimation effect of photonic crystals. The study also demonstrates the efficient control of beam behaviors using hyperbolic metamaterial photonic crystal membranes.
Article
Engineering, Electrical & Electronic
M. A. Baqir, P. K. Choudhury
Summary: A study was conducted on an optical biosensor based on hyperbolic metamaterial (HMM) for the detection of early-stage cancer cells. The effective medium theory was used to determine the properties of the metasurface. By analyzing the reflectance under different conditions, shifts in spectral minima were observed, allowing for the determination of the measurand's status. The sensitivity and figure-of-merit (FoM) of the structure were evaluated, showing that the device has a relatively high FoM that depends on various factors.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ming Ye, Bo Qiang, Song Zhu, Mingjin Dai, Fakun Wang, Yu Luo, Qian Wang, Qi Jie Wang
Summary: This study reports the first experimental demonstration of far-field excitation and manipulation of hyperbolic phonon resonances in metamaterial structures consisting of alpha-MoO3 nanodisks and slabs. By controlling the incident polarization angle, the resonances along different in-plane crystal directions can be selectively excited.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Physics, Applied
Guangwei Hu, Chunqi Zheng, Jincheng Ni, Cheng-Wei Qiu, Andrea Alu
Summary: In analogy to Lifshitz transitions in electronic systems, topological transitions have recently attracted attention in photonics, enabling exotic regimes for light-matter interactions. This study explores enhanced photonic local density of states in twisted hyperbolic bilayers, highlighting the potential applications of topological transitions in photonics for manipulating radiative heat transfer and controlling light at the nanoscale.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Blake S. Dastrup, Eric R. Sung, Frank Wulf, Clara Saraceno, Keith A. Nelson
Summary: Utilizing total internal reflection to increase the distance of optical rectification and achieving velocity matching through angle tuning can significantly enhance terahertz spectral amplitude. However, further enhancement is limited by 3-photon absorption and divergence of the pump beam.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Bartosz Janaszek, Anna Tyszka-Zawadzka, Pawel Szczepanski
Summary: In this paper, the potential of using a graphene-based hyperbolic metamaterial as a tunable optical power limiter and/or controllable laser noise suppressor for the terahertz frequency range is investigated. This is the first demonstration of such functionalities achieved with a voltage-controlled nonlinear hyperbolic metamaterial using graphene. The authors believe that these structures, achievable through planar deposition techniques, will have practical applications in THz systems that require optical power limiting.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Zhang-Kai Zhou, Hao-Fei Xu, Ying Yu, Limin Lin, Xue-Hua Wang
Summary: The study introduces periodic hyperbolic metamaterials (PHMM) to enhance the optical response of 2D materials with intensive and broadband EF enhancements, overcoming issues such as high loss, narrowband, and inside hot-spot effects. It demonstrates that PHMM can generate strong nonlinear optical responses, showcasing the potential for significant nonlinear response of monolayer 2D materials.
LASER & PHOTONICS REVIEWS
(2021)
Review
Nanoscience & Nanotechnology
Xanthippi Zianni
Summary: The use of metamaterials for thermoelectrics was proposed a decade ago, showing enhanced thermoelectric effects and decreased thermal conduction due to quantum interference and geometrically induced fluctuations. Electron and phonon transport properties of thermoelectric metamaterials in the quantum confinement regime are explored, demonstrating potential for high thermoelectric efficiency. Geometric modulation of electron and phonon properties provides strategies for designing materials with controlled heat conduction and enhanced thermoelectric properties.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Hao Wu, Xiaoyu Cheng, Songjun Xie, Yan Huang, Raheel Ahmed Janjua, Xinzi Liu, Sailing He
Summary: This study presents a strategy to control the photoluminescence emission of aluminum quantum dots (AlQDs). It is found that surfactants and phosphonic acids (PAs) competitively bind to the surface of AlQDs, and this binding is affected by the space volume of surfactants and charge of head groups. The emission properties of AlQDs mainly originate from the surface-mediated states, and the red-shifting of the emission peak is a result of increased amount of PAs on the surface, possibly related to the surface oxygen presented in both ligands and surfactants. Overall, this study provides a method to control the photoluminescence of AlQDs by changing the surfactants and surface ligands, which has important implications for their applications in photonics, energy and environment, as well as biomedicine.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Jing Chen, Yanxiao Zhao, Xuanjie Luo, Hao Hong, Tongqing Yang, Shen Huang, Chunli Wang, Hongyu Chen, Xin Qian, Mingfeng Feng, Zhengqiang Chen, Yongxin Dong, Zhenchuan Ma, Jia Li, Min Zhu, Sheng Yang He, Savithramma P. P. Dinesh-Kumar, Xiaorong Tao
Summary: Phytohormone signalling pathways play an important role in plant defence against pathogens. This study revealed that a pepper NLR protein Tsw interacts with a viral effector NSs to inhibit phytohormone receptor function, promoting virulence. Moreover, the plant has evolved a counter-virulence strategy by recognizing the interference of phytohormone signalling through a NLR protein with a structure resembling phytohormone receptors.
Correction
Multidisciplinary Sciences
Jing Chen, Yanxiao Zhao, Xuanjie Luo, Hao Hong, Tongqing Yang, Shen Huang, Chunli Wang, Hongyu Chen, Xin Qian, Mingfeng Feng, Zhengqiang Chen, Yongxin Dong, Zhenchuan Ma, Jia Li, Min Zhu, Sheng Yang He, Savithramma P. P. Dinesh-Kumar, Xiaorong Tao
Article
Materials Science, Multidisciplinary
Yuwei Sun, Zhipeng Hu, Kezhang Shi, Tingbiao Guo, Yuxin Xing, Yi Jin, Sailing He
Summary: Scientists demonstrate a resonant planar chiral dielectric metasurface design for circularly polarized emission (CPE). The design is easy to fabricate, with an extremely high and angle-insensitive far-field circular polarization degree. Experimental results show a 57-fold enhancement in photoluminescence from a thin film of PbS/CdS quantum dots coated on the metasurface, with a far-field degree of circular polarization as high as 0.74.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Yuting Zou, Zongxing Lin, Sailing He
Summary: This paper proposes a low-cross-talk and thermo-insensitive 1 x 4 coarse wavelength-division multiplexing device on the silicon-on-insulator platform. Compact Mach-Zehnder interferometers (MZIs) and slot waveguides are used to achieve wavelength-insensitive power splitting, while the trade-off between the opposite thermo-optical coefficients of the Si core and SU8 cladding is utilized to overcome the strong thermo-optic effect of silicon.
Article
Optics
Xiaoxuan Zheng, Zongxing Lin, Qiangsheng Huang, Sailing He
Summary: A novel structure utilizing a densely packed bent waveguide array is presented to eliminate mode hybridization in X-cut LiNbO3. The proposed structures show a polarization extinction ratio of -30 dB across all bend radii and low excess loss.
Article
Optics
Tie Zhang, Lihui Wang, Yan Huang, Haijie He, Sailing He, Gaoxuan Wang
Summary: A high-power near-infrared wavelength-modulated differential photoacoustic spectroscopy sensor has been developed for parts-per billion level methane detection using a homemade Raman fiber optical amplifier. Through the use of a commercial laser and specific techniques, the performance of the sensor is greatly improved, achieving a minimum detection limit of 10 ppb.
Article
Optics
Xiang Chen, Xuhui Huang, Sailing He
Summary: A four-dimensional hyperspectral surface topography measurement system is proposed to acquire three-dimensional spatial data and reflection/fluorescence spectra of an object. The system can assign spectral data to corresponding 3D point clouds, forming a 4D model. Experimental results demonstrate the great potential of the system in plant phenotype and growth analysis.
Article
Engineering, Electrical & Electronic
Jiahan Tian, Tingbiao Guo, Nan He, Ji Du, Qiangsheng Huang, Xiaojian Hong, Chao Fei, Yuan Wang, Tianyi Zhang, Junping Zhang, Sailing He
Summary: Modulating retro-reflector (MRR) free-space optical (FSO) communication technology is crucial for small-sized optical links and holds promise for application in small platforms. In this article, a wide field-of-view (FOV) MRR using an image space telecentric lens is proposed, and a bidirectional FSO communication system is experimentally demonstrated. The experimental results show that the designed MRR has a FOV of up to 110 degrees, achieving low bit error rates for both downstream and upstream signals.
IEEE PHOTONICS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Nan He, Tingbiao Guo, Jiahan Tian, Ji Du, Zhipeng Hu, Yuxin Xing, Yi Jin, Junping Zhang, Sailing He
Summary: Free space optical communication (FSO) is gaining attention due to high information capacity demand. A novel duplex FSO system utilizing a compact fiber coupling metalens is demonstrated, achieving a large field of view and high coupling efficiency. The system shows excellent downlink/uplink communication performance with low bit error rate and clear eye diagram, meeting the requirements of smart devices.
Article
Chemistry, Multidisciplinary
Zhenjia Zeng, Lei Wang, Yiran Wu, Zhipeng Hu, Julian Evans, Xinhua Zhu, Gaoao Ye, Sailing He
Summary: This research explores the data shift challenge in AI-based electromagnetic solvers and proposes innovative solutions. The combination of mixed training and multi-head attention significantly reduces the mean absolute error of data affected by data shift.
Article
Engineering, Electrical & Electronic
Zongxing Lin, Sailing He
Summary: In this article, a high-performance polarization beam splitter (PBS) based on a 220-nm SOI platform is proposed and experimentally demonstrated. The proposed PBS utilizes a sub-wavelength grating-assisted adiabatic directional coupler and a simple filter to achieve high separation and low insertion loss for TE and TM modes.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
He Zhu, Jing Luo, Jiaqi Liao, Sailing He
Summary: In this paper, a hyperspectral transmission microscopic imaging (HTMI) system is developed for precise identification and classification of mixed pathogenic bacteria. The system has high spatial and spectral resolution, and achieves a high classification accuracy of 93.6% using a simple PCA-SVM method.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2023)
Article
Engineering, Electrical & Electronic
Haozhe Wang, Dawei Gong, Guokai Cheng, Jiang Jiong, Dun Wu, Xinhua Zhu, Shengnan Wu, Gaoao Ye, Lingling Guo, Sailing He
Summary: This paper proposes a high-temperature anomaly detection method based on SegFormer in the infrared image of power transmission and transformation equipment. By preprocessing and segmenting the infrared images, it can detect temperature anomalies in key parts and has important practical value.
PROGRESS IN ELECTROMAGNETICS RESEARCH M
(2023)
Article
Engineering, Electrical & Electronic
Jing Pan, Yuanqing Yao, Liu Yang, Hui Li, Sailing He
Summary: In this study, an optically transparent and flexible wideband antenna is proposed and experimentally demonstrated. The antenna is based on sub-micron thick micro-metallic meshes, which provide high visible transmittance and low sheet resistance. The antenna shows excellent comprehensive performance with superior transparency, radiation efficiency, and mechanical properties, making it suitable for practical applications and the emerging field of flexible and wearable electronics.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2023)
