Article
Materials Science, Multidisciplinary
Borui Wu, Guangming Wang, Kaipeng Liu, Guangwei Hu, He-Xiu Xu
Summary: Recently, advanced computer algorithms, such as deep learning-based inverse design method, have been widely used in the design of electromagnetic devices for their fast design and high efficiency. However, these methods require a large amount of data and computational simulations. To overcome this issue, this paper proposes a fast and efficient strategy that integrates an equivalent-circuit-intervened model with a deep learning method to avoid blind calculations. Through a case study on absorbers with customized spectral patterns, the feasibility of this approach is verified, and the complex and time-consuming design processes in traditional methods are addressed.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Qian Xu, Ti Sun, Chinhua Wang
Summary: This study demonstrates achromatic imaging in the continuous broadband wavelength range with a single coded LC metalens. Both theoretical and experimental results show that the phase-coded LC lens exhibits great achromatic imaging behaviors in the visible wavelength range with a bandwidth of 134 nm and FOV of 24 degrees.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Maria Benetou, Kosmas L. Tsakmakidis
Summary: The study presents an experimental realization of a multifunctional microscale plasmonic metasurface that can perform various functionalities while maintaining high direct transmission and the properties of the input light beam. This device could potentially play a crucial role in on-chip adaptable integrated circuits for parallel signal processing, communications, and nondestructive sensing applications.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Ruizhe Zhao, Guangzhou Geng, Qunshuo Wei, Yue Liu, Hongqiang Zhou, Xue Zhang, Cong He, Xin Li, Xiaowei Li, Yongtian Wang, Junjie Li, Lingling Huang
Summary: A new method for designing dielectric metasurfaces using the double-phase method is introduced, achieving the capability of generating different holographic images with controllable polarization states in different diffraction orders. This design strategy is suitable for achieving complex wavefront modulation and may pave the way for various optical applications.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Optics
Xiaosai Wang, Ying Cui, Bin Ren, Shuai Tang, Jinlei Wu, Yongyun Jiang
Summary: We demonstrate a method for multi-channel metasurface holograms, where the focal points of metalens represent the pixels of holographic images, achieving nanoscale resolution. The required phase profiles are implemented by arranging hybrid all-dielectric meta-atoms with specific orientation angles. By polarization control, two-channel single-color images are reconstructed on the focal plane of the metalens. Alternatively, three-channel color holograms are exhibited by manipulating the incident wavelengths. Uniquely, the metalens can be further engineered to generate polarization-wavelength multiplexing color holograms in six channels. Our work provides an effective approach to reconstruct holographic images and has potential applications in color display, information engineering, and optical encryption.
Article
Physics, Applied
Karapet Manukyan, M. Zahirul Alam, Cong Liu, Kai Pang, Hao Song, Zhe Zhao, Moshe Tur, Robert W. Boyd, Alan E. Willner
Summary: This numerical study investigates the linear optical response of a plasmonic dipole antenna array in combination with an epsilon-near-zero (ENZ) thin film. It shows that the antenna array properties can be strongly or weakly influenced by the coupling with the ENZ film, and the presence of low-loss ENZ films can make the lower polariton branch visible. Additionally, thick, lossy ENZ films may result in the lower polariton branch being unobservable.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Quan Li, Chao Wu, Zhihui Zhang, Song Zhao, Bin Zhong, Song Li, Hongqiang Li, Lijun Jin
Summary: This article proposes a new method for generating high-purity multimode vortex beams by reconstructing the complete complex amplitude information on the meta-device aperture. Experimental results show that a 20 dB suppression of the crosstalk modes is achieved for co-directional multimode vortex beam generation, which is a significant improvement compared to the traditional phase-only scheme. Additionally, the proposed scheme enables the generation of high-purity multimode vortex beams with arbitrary preset propagation directions and power allocations. This study provides a platform for high-performance vortex beam communication by increasing the signal-to-noise ratio and enabling customized multicasting scenarios.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Multidisciplinary
Kai Pang, M. Zahirul Alam, Yiyu Zhou, Cong Liu, Orad Reshef, Karapet Manukyan, Matt Voegtle, Anuj Pennathur, Cindy Tseng, Xinzhou Su, Hao Song, Zhe Zhao, Runzhou Zhang, Haoqian Song, Nanzhe Hu, Ahmed Almaiman, Jahan M. Dawlaty, Robert W. Boyd, Moshe Tur, Alan E. Willner
Summary: In this study, it was demonstrated that the adiabatic frequency conversion effect can be significantly enhanced by using a nonlinear epsilon-near-zero-based plasmonic metasurface. The experimental results showed a large, tunable, and broadband frequency shift with a thinner metasurface, reducing device thickness and pump peak intensity compared to traditional materials. This finding could potentially lead to new insights for designing efficient time-varying metasurfaces for manipulating ultrafast pulses.
Article
Engineering, Electrical & Electronic
Yan Xi, Wen Jiang, Kun Wei, Tao Hong, Shuxi Gong
Summary: This study proposes an optically transparent hybrid mechanism metasurface that incorporates absorption, polarization conversion, and phase cancellation mechanisms to achieve wideband, wide-angle, and omnidirectional scattering suppression. The metasurface design exhibits wideband, wide-angle, high-efficiency, and omnidirectional co-polarized scattering suppression performance. The phase cancellation mechanism further enhances the scattering suppression effect by distributing the unit cell and its mirror structure in a chessboard configuration. The proposed metasurface has significant radar cross section reduction and good optical transparency, with potential applications in multifunctional stealth design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Materials Science, Multidisciplinary
Qi Hu, Weixu Yang, Jiahao Wang, Xiangcheng Lu, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng
Summary: A programmable metasurface that can produce multi-beam patterns with various polarization combinations is demonstrated. By applying periodic space-time-varying modulation signals to different components of the metasurface, arbitrary amplitude and phase responses for orthogonally polarized reflection properties can be obtained, enabling dynamic control of polarization channels and scattering patterns.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Xinhai Dai, Heng Wang, Lixun Sun, Chao Meng, Shuang Li, Wending Zhang, Ting Mei
Summary: Strong optical nonlinearities of plasmonic thin films exist at their epsilon-near-zero (ENZ) wavelengths, which are crucial for the design and fabrication of ENZ photonic devices. Obtaining the ENZ wavelength precisely when the film thickness is reduced to tens of nanometers or less has been challenging. This study proposes a method to accurately extract the ENZ wavelength from the transmittance and reflectance spectra under oblique light excitation.
Article
Engineering, Electrical & Electronic
Long Li, Pei Zhang, Fangjie Cheng, Mingyang Chang, Tie Jun Cui
Summary: A novel optically transparent reflection-type metasurface based on indium tin oxide (ITO) material is proposed in this study, which achieves high transmission of visible light and near-field focusing of microwave, demonstrating potential for wireless power transfer and harvesting applications. By overcoming the main challenge in designing metasurface with lossy metal materials, the study successfully designs two types of metasurfaces for different deployment scenarios.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Optics
Yuning Wu, Zhiwei Shi, Huan Jiang, Yaohua Deng
Summary: In this study, a Dammann grating based on metasurface was designed, which can be controlled through multi-beam interference to achieve a change of the working wavelength. It successfully generated 5 x 5 diffraction spot arrays in the wavelength range of 480-510 nm and 950-1020 nm.
Article
Materials Science, Multidisciplinary
Chaohui Wang, He-Xiu Xu, Yanzhao Wang, Cheng Zhang, Shaojie Wang, Mingzhao Wang, Xiao Yang
Summary: The study demonstrates a strategy using heterogeneous materials to achieve amplitude-phase manipulation, by simultaneously using ITO films and metal patterns on a metasurface to achieve near-zero and near-unity reflections in different linear polarization states. This method can trigger polarization-dependent functionalities and has the potential to achieve high-performance multifunctionalities.
ADVANCED PHOTONICS RESEARCH
(2021)
Article
Chemistry, Physical
Cuixiu Xiong, Liu Chao, Biao Zeng, Kuan Wu, Min Li, Banxian Ruan, Baihui Zhang, Enduo Gao, Hongjian Li
Summary: A five-step coupled pyramid-shaped monolayer graphene metamaterial is proposed, with a dynamically controllable PIT featuring four transparency peaks predicted for the first time. Tunable multi-switch and good slow light effect are expected, with a maximum modulation depth of 16.89 dB.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Mohammad Mahdi Salary, Ali Forouzmand, Hossein Mosallaei
Article
Engineering, Electrical & Electronic
Ali Forouzmand, Hossein Mosallaei
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2017)
Article
Nanoscience & Nanotechnology
Ali Forouzmand, Hossein Mosallaei
JOURNAL OF NANOPHOTONICS
(2017)
Article
Optics
Ali Forouzmand, Hossein Mosallaei
Article
Materials Science, Multidisciplinary
Mohammad M. Salary, Ali Forouzmand, Hossein Mosallaei
MRS COMMUNICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Ali Forouzmand, Mohammad Mahdi Salary, Sandeep Inampudi, Hossein Mosallaei
ADVANCED OPTICAL MATERIALS
(2018)
Article
Nanoscience & Nanotechnology
Ali Forouzmand, Hossein Mosallaei
Article
Nanoscience & Nanotechnology
Ali Forouzmand, Hossein Mosallaei
Article
Optics
Ali Forouzmand, Hossein Mosallaei
LASER & PHOTONICS REVIEWS
(2020)
Article
Nanoscience & Nanotechnology
Ali Forouzmand, Mohammad Mahdi Salary, Ghazaleh Kafaie Shirmanesh, Ruzan Sokhoyan, Harry A. Atwater, Hossein Mosallaei
Proceedings Paper
Engineering, Electrical & Electronic
A. Forouzmand, M. M. Salary, H. Mosallaei
2018 12TH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
Gabriel Moreno, Ali Forouzmand, Alexander B. Yakovlev, Mario G. Silveirinha, George W. Hanson
2017 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Gabriel Moreno, Maziar Hedayati, Ali Forouzmand, Alexander B. Yakovlev, Mario G. Silveirinha, George W. Hanson
2017 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Ali Forouzmand, Hossein Mosallaei
2017 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2017)