Article
Chemistry, Analytical
Chao Mei, Yuan Wu, Jinhui Yuan, Shi Qiu, Xian Zhou
Summary: In this paper, a polarization beam splitter (PBS) based on surface plasmonic resonance is designed and realized in a photonic crystal fiber (PCF). The proposed PBS achieves a shorter length and a wider operating bandwidth.
Article
Optics
Zhicheng Wang, Zheng Peng, Yuqing Zhang, Yilu Wu, Jiagui Wu, Junbo Yang
Summary: This research presents the design of an optical power splitter with ultra-broadband and ultra-low insertion loss using two inverse design algorithms for staged optimization. The Y-junction photonic power splitter achieves a 700 nm wavelength bandwidth (from 1200 nm to 1900 nm) with a 0.2 dB insertion loss, corresponding to a 93 THz frequency bandwidth. The average insertion loss in the valuable C-band is approximately -0.057 dB. Additionally, a comprehensive comparison of insertion loss performance for different types and sizes of curved waveguides is provided, along with cases of 1:4 and 1:6 cascaded power splitters. These scalable Y-junction splitters offer new alternatives for high-performance photonic integration.
Article
Optics
Yanan Xu, Jinhui Yuan, Yiru Li, Yuwei Qu, Xian Zhou, Binbin Yan, Kuiru Wang, Xinzhu Sang, Chongxiu Yu
Summary: In this paper, a dual-core photonic crystal fiber polarization beam splitter with an octagon structure and a filled central hole of liquid crystal is designed. Simulation results show that the designed PBS has high extinction ratio, short splitting length, and wide working bandwidth. It also has good fabrication tolerances and anti-interference ability, which can provide critical device support for future all-optical communication systems.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Yangming Ren, Lingxuan Zhang, Weiqiang Wang, Xinyu Wang, Yufang Lei, Yulong Xue, Xiaochen Sun, Wenfu Zhang
Summary: This study introduces an efficient method for designing photonic devices, which combines deep neural networks with genetic algorithm, requiring less training data compared to previous methods. Several ultra-compact silicon photonics devices with challenging properties were designed using this method, generally complying with silicon photonics fabrication design rules.
PHOTONICS RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
M. A. Butt, S. N. Khonina, N. L. Kazanskiy
Summary: This study presents a novel design of a polarization beam splitter (PBS) based on heterostructure 2D- Photonic crystals (PhCs), including two different PhC structures for TE and TM polarized light. By arranging and combining the structures differently, high polarization extinction ratio PBS, steering of TE polarized light, and TM polarization maintenance devices can be achieved.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2021)
Article
Physics, Applied
Chao Liu, Sinuo An, Jingwei Lv, Lin Yang, Famei Wang, Qiang Liu, Xianli Li, Weiquan Su, Tao Sun, Paul K. Chu
Summary: A multi-functional dual-core photonic crystal fiber polarization beam splitter is designed with central oval hole filled with gold, improving sensing performance. By filling circular holes with nematic liquid crystal, the polarized light in x- and y-directions can be separated at different wavelengths for extinction ratios larger than 10 dB, providing insights into designing beam splitters with multiple functions.
MODERN PHYSICS LETTERS B
(2021)
Article
Physics, Applied
Yifeng Ding, Chao Liu, Lin Yang, Jingwei Lv, Guanglai Fu, Xianli Li, Qiang Liu, Famei Wang, Tao Sun, Paul K. Chu
Summary: Two photonic crystal fiber (PCF) polarization beam splitters with ultra-short length and ultra-high extinction ratios have been designed and investigated at wavelengths of 1.31 μm and 1.55 μm. Non-silicon materials were used to ensure operation within the communication bandwidth, and structural parameters were optimized through numerical simulation. The results demonstrate the great potential of these splitters in environmental monitoring, biochemical detection, and optical communication.
MODERN PHYSICS LETTERS B
(2021)
Article
Optics
Geyu Tang, Huamao Huang, Yuqi Liu, Hong Wang
Summary: The proposed compact polarization beam splitter utilizes the self-collimation effect of two-dimensional photonic crystals and photonic bandgap characteristics. It effectively separates TE and TM polarized lights with high extinction ratios, meeting the needs of modern optical communications and integrated systems.
Article
Optics
Gagandeep Kaur, Harshawardhan Wanare
Summary: We propose a Mach-Zehnder configuration evanescent-field interferometer capable of measuring the interferometric phase of evanescent fields and quantifying the Hartman effect. Numerical simulations and an analytical model of the proposed interferometer, implemented using a two-dimensional photonic crystal system with carefully designed cavities, showed the saturation of phase difference for tunneled fields at π/2, confirming the classic Hartman effect. The evanescent-field interferometer offers multiple avenues for introducing phase delay and has a spatially delocalized higher sensitivity compared to conventional propagating-field interferometers.
Article
Optics
Chaobin Ren, Jinhui Yuan, Kuiru Wang, Binbin Yan, Xinzhu Sang, Chongxiu Yu
Summary: A polarization beam splitter (PBS) based on dual-core photonic crystal fiber (DC-PCF) with elliptical air holes is proposed for enhancing birefringence. The simulation results show that the proposed PBS can achieve complete beam splitting at wavelength 1.55 μm and have a bandwidth up to 48 nm covering the entire C-band when the extinction ratio is less than -20 dB. The proposed PBS is believed to be a promising candidate in laser and sensor systems.
OPTICAL ENGINEERING
(2021)
Article
Optics
Guang-Ming Zheng
Summary: A mid-infrared polarization beam splitter based on GaS chalcogenide dual-core photonic crystal fiber was designed and investigated, achieving ultrabroad bandwidth and high polarization extinction ratio, making it suitable for mid-infrared optical communication applications.
Article
Physics, Multidisciplinary
Yongtao Li, Jiesong Deng, Zhen Yang, Hui Zou, Yuzhou Ma
Summary: A novel ultra-broadband polarization splitter based on a dual-core photonic crystal fiber (DC-PCF) is designed, which employs graphene filling, fluorine-doped, and germanium-doped regions to broaden the bandwidth and reduce the size. The polarization splitter achieves a high extinction ratio at 1550 nm wavelength and has a wavelength range of 1027 nm-1723 nm.
Article
Optics
Yuwei Qu, Ying Han, Jinhui Yuan, Xian Zhou, Binbin Yan, Kuiru Wang, Xinzhu Sang, Chongxiu Yu
Summary: The novel liquid crystal-filled, dual core photonic crystal fiber polarization beam splitter proposed in this paper has a good beam-splitting performance, with ultra-short splitting length and ultra-wide splitting bandwidth, making it suitable for potential applications in laser, sensing, and communication systems.
Article
Optics
Junbo Lou, Yonghui Yang, Xinhe Zhang, Qiang Qu, Shuguang Li
Summary: A circular ultra-short As2S3 filled double-core photonic crystal fiber polarization beam splitter is proposed, and its performance is studied using the finite element method. By optimizing geometric parameters, the splitting length can be as short as 72.43 μm, and the extinction ratio can reach -151.42 dB. Due to its high extinction ratio, extremely short beam splitting function, and simple structure, this polarization beam splitter has significant potential in all-optical networks and optical device preparation.
Article
Optics
Yanan Xu, Jinhui Yuan, Yuwei Qu, Shi Qiu, Xian Zhou, Binbin Yan, Kuiru Wang, Xinzhu Sang, Chongxiu Yu
Summary: A compressed hexagonal dual-core photonic crystal fiber polarization beam splitter (CH-DC-PCF PBS) with a liquid crystal filled air hole is designed and optimized. The PBS shows high extinction ratio and wide bandwidth, covering the S + C + L + U communication band.
OPTICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Mi Lin, Lixin Fu, Shakeel Ahmed, Qiong Wang, Yaoxian Zheng, Zixian Liang, Zhengbiao Ouyang
Summary: A novel polarization-independent circulator based on a composite rod of ferrite and plasma materials in a two-dimensional photonic crystal slab was proposed, achieving low insertion loss and high isolation for both TE and TM polarizations. The structure design includes a single composite rod for circulation and three additional rods for improved coupling condition, with optimization method used to obtain optimum parameters.
Article
Chemistry, Multidisciplinary
Sayed Elshahat, Israa Abood, Zixian Liang, Jihong Pei, Zhengbiao Ouyang
Summary: The study proposes a paradigm for high buffering performance in a photonic crystal waveguide, achieved through structural adjustments and sensitivity enhancements to the liquid medium, resulting in dynamic modulation and strong light-matter interaction.
Article
Nanoscience & Nanotechnology
Maosong Liu, Xin Jin, Shun Li, Jean-Baptiste Billeau, Tingyu Peng, Henan Li, Long Zhao, Zuotai Zhang, Jerome P. Claverie, Luca Razzari, Jianming Zhang
Summary: The recent application of localized surface plasmon resonances (SPRs) in metallic nanoparticles has led to the construction of plasmonic nanohybrids for heterogeneous photocatalysis. By encapsulating an Ag NP core with SiO2 and TiO2 layers, and Au NPs on the outer surface, an efficient plasmonic photocatalyst, Ag@SiO2@TiO2-Au, has been designed to enhance catalytic activity. The structure unit with strong scattering and field enhancement induced by a plasmonic resonator is shown to significantly boost photocatalytic activity for high H-2 production rates under visible light.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Yan Liu, Rui Huang, Zhengbiao Ouyang
Summary: An absorber based on hybrid metamaterial with vanadium dioxide and graphene achieves dynamically switchable dual-broadband absorption in the terahertz regime by controlling the phase transition of vanadium dioxide and the Fermi energy level of graphene. The absorber can achieve high absorptance in high-frequency broadband and low-frequency broadband, with the absorption intensity being continuously adjustable by electrically controlling the Fermi energy level of graphene. The absorption window can be further broadened by adjusting geometrical parameters, making the absorber suitable for applications such as filtering, sensing, cloaking objects, and switches in the terahertz regime.
Article
Chemistry, Multidisciplinary
Sayed Elshahat, Israa Abood, Mohamed Saleh M. Esmail, Zhengbiao Ouyang, Cuicui Lu
Summary: The study introduces a novel photonic crystal mirror heterostructure with high-quality factor (Q) and strong sensing ability and performance. It shows a defect mode at the interface with high Q-factor and enhancement of light-matter interaction, suitable for optical sensing, filtering, and switching applications. The introduction of an electro-optical polymer layer at the interface can further tune the defect mode for higher spatial pulse compression and electro-optical sensitivity.
Article
Optics
M. Pavithra, K. Ravichandran, V Subramanian, Zhengbiao Ouyang, N. Yogesh
Summary: This work investigates the application of linear asymmetric transmission (AT) in controlling terahertz (THz) far-field radiation patterns using a metasurface (MS). A bi-layered metal design is used to achieve strong linear AT in the frequency range of 4.4 THz to 5.1 THz. Different MS tiles are constructed to significantly alter the electric field pattern, angular bandwidth, and side-lobe levels of THz far-fields.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Qiong Wang, Zhengbiao Ouyang, Mi Lin, Yaoxian Zheng
Summary: A new absorber with graphene sandwiched between dielectric rings is proposed, achieving two absorption peaks with high efficiency. The study also investigates the impact of geometrical parameters on absorption performance and highlights the potential of actively manipulating the device by varying the chemical potential of graphene.
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
Chemistry, Multidisciplinary
Yaoxian Zheng, Qiong Wang, Mi Lin, Luigi Bibbo, Zhengbiao Ouyang
Summary: This study demonstrates that photonic hypercrystals can achieve twisted bands in the infrared region by utilizing hyperbolic metamaterials in two-dimensional photonic crystals. The twisted bands have degenerate points that enable all-angle self-collimation effects and dramatically change the behavior of light beams, offering an effective method for light propagation control and switching. By investigating the influence of the filling factor and permittivity of the HMM on the twisted bands, an all-optical switch with low switching power and high extinction ratio is proposed.
Article
Optics
Vijay Laxmi, Abida Parveen, Deepika Tyagi, Lalit Singh, Zhengbiao Ouyang
Summary: A nanophotonic modulator based on Silicon-ITO heterojunction and 2D-graphene sheets is proposed, which exhibits excellent modulation performance and low power consumption, suitable for phase and amplitude modulation in silicon on-chip communication and interconnects.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Chemistry, Physical
Lixin Fu, Mi Lin, Zixian Liang, Qiong Wang, Yaoxian Zheng, Zhengbiao Ouyang
Summary: In this paper, the transmission properties of one-dimensional photonic crystals (1D PCs) consisting of gradient materials were studied. It was found that high-index gradient materials can achieve larger photonic band gap (PBG) and the position of defect modes can be adjusted by selecting proper parameters of the gradient materials. These findings are useful for designing wide PBG devices and tunable narrow-band filters.
Article
Optics
Vijay Laxmi, Deepika Tyagi, Abida Parveen, Lalit Singh, Zhengbiao Ouyang
Summary: A nanophotonic photodetector with a multi-heterojunction structure based on silicon-ITO slot waveguide covered with 2D graphene sheets is proposed. The device utilizes a heavily n-doped ITO layer as an electrode to reduce light loss at the metal-graphene interfaces. By arranging different waveguides to create a one-dimensional photonic crystal, strong light confinement and enhanced light-matter interaction are achieved, leading to higher photocurrent, fast response, and enhanced electron-photon interaction. The device demonstrates great potential in various applications such as telecommunications, optical computing, sensing, and quantum photonics.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Yinbing An, Tao Fu, Chunyu Guo, Jihong Pei, Zhengbiao Ouyang
Summary: This study designed fully controlled superbound state modes in the bandgap with ultra-high-quality factors approaching infinity. The operating mechanism of the modes is based on interference of the fields of two phase-opposite dipole sources. The findings provide useful guidelines for the design and manufacture of compact and high-performance sensors, nonlinear effects, and optical switches.
Article
Chemistry, Analytical
Yinbing An, Tao Fu, Chunyu Guo, Jihong Pei, Zhengbiao Ouyang
Summary: This study designed a special structure to achieve high-quality bound states in the continuum (BICs) with improved signal-to-noise ratio and wide frequency range, enabling high-sensitivity biosensing and multi-wavelength sensing.
Article
Optics
M. Marishwari, S. Madhavamoorthi, R. Meena, B. Asrafali, V. Subramanian, Z. Ouyang, N. Yogesh
Summary: In this work, directional multibeam compact wavefront transformers based on near-zero refraction in 3-D metamaterial at terahertz frequencies are reported. The near-zero refraction in the metamaterial is verified by the uniform phase maintenance inside the stacked layers. Uni-, bi-, and quaddirectional wavefront transformers are realized by embedding a cylindrical wavefront source inside the metamaterial configurations, and the results are compared to the ideal cases.
