Article
Optics
Fei Hu, Fang Chen, Huafeng Zhang, Lihui Sun, Chunchao Yu
Summary: The study presents triple Fano resonance through a plasmonic waveguide system, originating from narrow discrete resonances of an isosceles-triangular resonator and the broad continuous state of a nanorod-defect. Results show that Fano line shapes can be independently tuned by adjusting geometrical parameters.
Article
Physics, Multidisciplinary
Daijing Xu, Shubin Yan, Xiaoyu Yang, Jinxi Wang, Xiushan Wu, Ertian Hua
Summary: The article introduces a novel nanoscale optical structure for refractive index detection, investigates the transmission properties and the effects of geometric parameters on sensing performance, and discusses the influences of an asymmetric resonator on the transmission spectrum.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Physical
Siti Rohimah, He Tian, Jinfang Wang, Jianfeng Chen, Jina Li, Xing Liu, Jingang Cui, Qiang Xu, Yu Hao
Summary: A plasmonic structure of metal-insulator-metal (MIM) waveguide, consisting of a baffle waveguide and an r-shaped resonator, is designed to produce Fano resonances. By changing the geometrical parameters, the Fano resonances can be tuned, and the sensitivity of refractive index sensing is strongly dependent on the geometrical parameters.
Article
Engineering, Electrical & Electronic
Hocine Bahri, Souheil Mouetsi, Abdesselam Hocini, Hocine Ben Salah
Summary: The proposed plasmonic biosensor design with high sensitivity and resolution achieved remarkable properties suitable for biosensors, filters, and provided a new possibility for designing compact and high-performance plasmonic biosensor devices.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Optics
Mingyu Wang, He Tian, Xing Liu, Jina Li, Yajie Liu
Summary: A metal-insulator-metal (MIM) surface plasmon waveguide structure is proposed and numerically investigated in this paper. The structure can produce independently tunable triple Fano resonances by changing the structural parameters. The detection of refractive indexes at different positions in the structure was accomplished, and the simultaneous measurement of multiple parameters was performed.
Article
Materials Science, Multidisciplinary
Jun Zhu, Changsong Wu
Summary: This paper proposes a waveguide structure based on Fano resonance, with an extremely narrow impedance formed in the transmittance spectrum, which can achieve high sensitivity nano refractive index sensing. The structure can accurately identify pure edible vegetable oils, but has limitations in distinguishing mixed edible vegetable oils.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Analytical
Tingsong Li, Shubin Yan, Pengwei Liu, Xiaoyu Zhang, Yi Zhang, Lifang Shen, Yifeng Ren, Ertian Hua
Summary: A nano-refractive index sensor was designed using a metal-insulator-metal (MIM) waveguide and an orthogon ring resonator (ORR) to optimize transmission characteristics through parameter changes. The sensor showed high sensitivity and figure of merit, and has potential applications in detecting trace element concentrations in the human body.
Article
Optics
Jianfeng Chen, Jina Li, Xing Liu, Siti Rohimah, He Tian, Dawei Qi
Summary: A metal-insulator-metal type surface plasmon waveguide structure was designed in this study, showing potential applications in refractive index sensors and slow light devices. By optimizing geometric parameters, the characteristics of Fano resonance, sensitivity, and figure of merit of the structure can be adjusted.
OPTICS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yiping Sun, Desheng Qu, Qiaohua Wu, Chunlei Li
Summary: A multi-purpose waveguide structure utilizing surface plasma polariton (SPPs) has been developed. The structure consists of a metal-insulator-metal straight waveguide with a silver baffle, an analogous M-shaped cavity, and a semi-ellipse cavity. The optical transmission properties and magnetic field distributions of the structure are examined using the finite element method. Fano resonances can be adjusted by modifying the geometrical properties of the corresponding cavity, and the structure shows high refractive index sensitivity and the ability to detect cholesterol and ethylene glycol concentrations simultaneously.
Article
Engineering, Electrical & Electronic
Haopeng Fan, Jinping Tian, Rongcao Yang
Summary: In this paper, a plasmonic MIM waveguide with a k-shaped resonant cavity is designed to support three Fano resonances. The physical mechanisms behind the multiple Fano resonances are studied using field distributions and changes in geometric parameters. Refractive index sensing is investigated by varying the refractive index of the dielectric medium in the waveguide's air part, achieving a maximum sensitivity of 1250 nm/RIU and a maximum figure of merit over 4000. The slow-light effect is also analyzed, showing a maximum optical delay of 0.05 ps and a group index of 9.23. These findings provide fundamental references for the design of plasmonic optical waveguide devices and have potential applications in nanoscale refractive index sensing, slow-light effects, photonic device integration, and more.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Banxian Ruan, Chao Liu, Cuixiu Xiong, Min Li, Baihui Zhang, Enduo Gao, Kuan Wu, Hongjian Li
Summary: The study investigated a grating coupled graphene surface plasmon and planar waveguide structure, revealing a sharp asymmetric Fano resonance attributed to the coupling between graphene plasmon and waveguide mode. The physical origin of Fano resonance was analyzed, demonstrating tunable properties and potential applications in light absorption and refractive index sensing. The proposed Fano resonance shows promise in developing functional devices for excellent light absorption and refractive index sensing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Tahmid Mahbub, Qazi Mahabub-A-Rabbani, Sakib Mahmud, Rakibul Hasan Sagor
Summary: In this article, an optical refractive index (RI) nanosensor based on a metal-insulator-metal (MIM) waveguide configuration with gold as the plasmonic metal has been presented. The structure includes quintuple grids resonant cavity with uneven grid lengths for enhanced performance. Numerical analysis using the finite element method (FEM) in the mid-infrared region (MIR) shows that the optimized structure exhibits high sensitivity of 4737.87 nm/RIU and a figure of merit (FOM) of 9.37. The device can be used for sensing organic gas vapors and temperature applications, providing a practical and simplified alternative to complex structures.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jian Zhang, Tianshan Chen, Hanwen Chen, Xiangxian Wang, Hua Yang, Yunping Qi, Chaojun Tang, Jianli Yu
Summary: This study proposes a micro-nano structure that can generate multiple Fano resonances for refractive index sensing. The structure consists of a metal-insulator-metal waveguide with a baffle and two resonators, one hexagonal nut and one square ring. The designed structure can generate up to five Fano resonances tuned by different resonators. The sensitivity and figure of merit of the structure are investigated and show great potential for gas and liquid sensors in micro-nano sensing and biochemical medicine applications.
Article
Engineering, Electrical & Electronic
Desheng Qu, Qiaohua Wu, Yiping Sun, Chunlei Li
Summary: In this paper, a metal-insulator-metal waveguide coupled with double Fibonacci spiral structure is designed and studied. The Fano resonance characteristics of the structure are analyzed in detail by means of transmission spectra and magnetic field distribution using finite element method. By changing the geometric parameters and refractive index, the sensing characteristics of the structure are quantitatively analyzed. This structure can be used in sensors, not only the sensitivity can reach an extremely high value of 3350 nm/RIU, but also the refractive index and peak wavelength show an excellent linear relationship. This structure provides a new scheme for the design of high sensitivity sensors. In addition, by measuring the refractive index of sodium chloride solution, it is proved that the structure has practical application prospect.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2023)
Article
Crystallography
Dayong Zhang, Li Cheng, Zuochun Shen
Summary: This study investigated the regulation of the direction of the Fano resonance line shape by proposing a Fano resonant plasmonic system consisting of a MIM waveguide coupled with a ring resonator and a rectangle resonator. The influencing factors and formation laws of the 'direction' of the Fano line-shape were identified, along with the optimal condition for generating multiple Fano resonances, and the application in refractive index sensing was well studied. The conclusions can serve as a clear theoretical reference for designing plasmonic nanodevices with controlled Fano resonance line shapes and multiple Fano resonances.
Article
Chemistry, Physical
Jiao Zhang, Xiaofeng Sun, Jinyuan Ma, Zao Yi, Tao Xian, Shifa Wang, Guorong Liu, Xiangxian Wang, Hua Yang
Summary: Rational design of heterostructures is an effective strategy for enhancing the photocatalytic activity of semiconductors. In this study, a dual Z-scheme CdS/ZWO/ZnS heterojunction photocatalyst was synthesized by assembling zero-dimensional CdS and ZnS quantum dots onto one-dimensional ZnWO4 nanorods. The photocatalytic experiments demonstrated that the dual Z-scheme heterojunction photocatalyst exhibited significantly higher photodegradation activity compared to individual CdS, ZnS, and binary CdS/ZWO and ZnS/ZWO heterojunctions. The characteristics and photocatalytic mechanism of the CdS/ZWO/ZnS photocatalysts were investigated using various measurement techniques and computational calculations.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jiao Zhang, Jinyuan Ma, Xiaofeng Sun, Zao Yi, Tao Xian, Xianwen Wu, Guorong Liu, Xiangxian Wang, Hua Yang
Summary: A new type of Ag2MoO4/ZnWO4 composite photocatalyst with a Z-scheme mechanism was developed by anchoring AMO nanoparticles onto ZWO nanorods. The performances and photocatalytic mechanism of the AMO/ZWO heterojunctions were studied through multiple characterization methods and DFT calculations. The enhanced photocatalytic mechanism of the AMO/ZWO heterojunctions was revealed to be the efficient separation of photocarriers via a Z-scheme transfer process, which was confirmed by simulated-sunlight-driven photodegradation experiments and DFT calculations.
Article
Optics
Yaqian Ren, Xiangxian Wang, Xiujuan Di, Tianxu Jia, Tianshan Chen, Liping Zhang, Hua Yang, Yunping Qi, Chaojun Tang
Summary: This study investigates the guided mode interference lithography technique using a symmetric metal-cladding dielectric waveguide structure. By adjusting the thickness of the resist and rotating the sample, periodic sub-wavelength gratings with different structures can be fabricated successfully.
Article
Optics
Yunping Qi, Li Wang, Yujiao Wen, Haowen Chen, Yujiao Yuan, Zihao Zhou, Shiyu Zhao, Xiangxian Wang
Summary: A bifunctional absorber with hybrid graphene-vanadium dioxide (VO2) has been proposed and numerically investigated. The absorber demonstrates broadband absorption from 3.15 THz to 8.45 THz with absorptance above 90% when VO2 is in the metallic state. It also exhibits a 10-band absorber with peak absorptances above 90% when VO2 is in the insulating state. The absorber offers great potential in terahertz applications such as modulation, switching, and electromagnetic energy harvesting.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Hao Li, Yunping Qi, Mingrui Su, Xiangxian Wang
Summary: A dynamically tunable reconfigurable metasurface combining vanadium dioxide (VO2) as a phase-change material is proposed in the terahertz (THz) band. The metasurface operates in the wide frequency range of 1.09-2.13 THz, achieves a polarization conversion ratio of over 95%, and maintains good performance after the phase transformation of VO2. By utilizing a 3-bit coded metasurface with a special phase arrangement, control over the electromagnetic wavefront, generation of orbital angular momentum, vortex focusing, anomalous reflection, and radar cross section reduction are achieved. This metasurface shows potential applications in secure communication, near-field imaging, wireless transmission, etc.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Physics, Condensed Matter
Hanwen Chen, Xiangxian Wang, Jian Zhang, Xijun Rao, Hua Yang, Yunping Qi, Chaojun Tang
Summary: A plasmonic refractive index sensor based on a composite structure consisting of a gold nano-cross array on a gold nanofilm and a SiO2 spacer is proposed. Surface plasmon resonance is excited by a perpendicular plane wave, with a part of the incident wave coupling to the localized surface plasmon by the gold nano-cross array. Numerical results show high sensitivity and figure of merit in both gas and liquid environments, indicating the broad application prospects of the proposed composite structure in biological and chemical fields.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Jian Zhang, Tianshan Chen, Hanwen Chen, Xiangxian Wang, Hua Yang, Yunping Qi, Chaojun Tang, Jianli Yu
Summary: This study proposes a micro-nano structure that can generate multiple Fano resonances for refractive index sensing. The structure consists of a metal-insulator-metal waveguide with a baffle and two resonators, one hexagonal nut and one square ring. The designed structure can generate up to five Fano resonances tuned by different resonators. The sensitivity and figure of merit of the structure are investigated and show great potential for gas and liquid sensors in micro-nano sensing and biochemical medicine applications.
Article
Materials Science, Multidisciplinary
Jing Chen, Lianjie Zhao, Yong Cheng, Zhendong Yan, Xiangxian Wang, Chaojun Tang, Fan Gao, Zao Yi, Mingwei Zhu
Summary: In this work, both broadband and narrowband absorption peaks are achieved in monolayer graphene by introducing periodic arrays of silver nanodisks. The broadband absorption peak is attributed to localized dipolar plasmon resonances in individual silver nanodisks, while the narrowband absorption peak arises from collective first-order diffraction coupling effect. The full width at half maximum (FWHM) of the broadband absorption peak can be varied from 100 nm to 50 nm by changing the array period, and the FWHM of the narrowband absorption peak can be tuned from about 6.4 nm to only 0.25 nm, realizing an ultra-narrow sub-nanometer bandwidth.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Shiyu Zhao, Yunping Qi, Haowen Chen, Yujiao Wen, Li Wang, Zihao Zhou, Shu Zhang, Xiangxian Wang
Summary: This paper proposes a metal-insulator-metal waveguide structure based on a key-shaped resonator. The structure is simulated using the FDTD method, showing the generation of three resonant peaks. The simulation results are then analyzed using the MICMT, demonstrating a high level of agreement. By adjusting the parameters, the resonant peaks can be independently tuned. Notably, the structure achieves a maximum sensitivity of 1520 nm RIU-1 with a FOM* of 195.89, highlighting its exceptional sensing capabilities. The analysis of the asymmetric structure reveals the emergence of a new Fano resonance. The feasibility of blood plasma concentration detection is assessed, achieving a maximum sensitivity of 3.07 nm l g(-1). As a result, this structure offers promising opportunities in the field of on-chip optical integration and the biomedical field, among others.
Article
Physics, Multidisciplinary
Shu Zhang, Yunping Qi, Qiang Shi, Mingrui Su, Shiyu Zhao, Xiangxian Wang
Summary: In this work, a symmetric structure based on metal-insulator-metal (MIM) waveguide is proposed for narrow-band notch filters and refractive index sensors. The structure includes a symmetrically intersecting rectangular-semi-annular cavity and a long straight waveguide. The transmission spectrum and magnetic field distribution of the notch filter are studied using finite element method (FEM) with scattering boundary conditions (SBC). Results show that the band-stop filter exhibits a minimum transmittance of 0.35%, a bandwidth of 34 nm, and a quality factor (Q) of 35.16. Moreover, the structure allows for independent adjustment of the narrow band filtering range by varying geometric parameters such as H, d, R1, and d. The refractive index sensitivity of the structure reaches a high value of 1222 nm RIU-1, accompanied by a figure of merit (FOM*) of up to 175.9. These results demonstrate the structure's excellent filtering properties and high-sensitivity sensing characteristics. Therefore, it holds significant potential for application in high-density integrated circuits and nano-optics.
Article
Physics, Multidisciplinary
Mingrui Su, Yunping Qi, Hao Li, Shu Zhang, Xiangxian Wang
Summary: In order to improve the performance of subwavelength refractive index and temperature sensors, this paper proposes a subwavelength metal-insulator-metal (MIM) waveguide structure consisting of a sawtooth U-shaped cavity and a rectangular cavity based on surface plasmon polaritons. The transmission spectrum of the system is simulated using the finite element method (FEM) and verified with multi-mode interference coupled-mode theory (MICMT). The results demonstrate excellent sensing characteristics for the system, with a refractive index sensitivity of 1300 nm RIU-1, a figure of merit (FOM*) of 191.262, and a temperature sensitivity of 0.525 nm/& DEG;C. This indicates that the nano-plasma system is highly significant in refractive index and temperature sensing.
Article
Physics, Multidisciplinary
Qi Yun-Ping, Jia Ying-Jun, Zhang Ting, Ding Jing-Hui, Wei Jing-Wen, Wang Xiang-Xian
Summary: In this study, a dynamically tunable refractive index sensor was designed by introducing graphene nanotubes into the metal-insulator-metal waveguide structure. By changing the chemical potential of graphene, the performance of the sensor can be dynamically tuned. This device has advantages such as wide operating band range, easy processing, and dynamic tunability.
ACTA PHYSICA SINICA
(2022)
Article
Engineering, Electrical & Electronic
Su Yingwen, Chen Zhenyu, Xu Yueqi, Wang Xiangxian
Summary: A method of fabricating multi-layer subwavelength circular gratings based on high-order waveguide mode interference and continuous sample rotation is proposed. The optical field distribution and adjustment methods are studied through simulation and numerical analysis. This method is simple and effective, with potential applications in the field of micro-nano optics.
LASER & OPTOELECTRONICS PROGRESS
(2022)
Article
Physics, Multidisciplinary
Xiangxian Wang, Jian Zhang, Jiankai Zhu, Zao Yi, Jianli Yu
Summary: We propose a refractive index sensing method based on a hybrid structure of a nano-cube array and multilayer full-dielectric thin films. By optimizing the structural parameters, high quality factors of two Fano resonances are achieved, indicating extensive application prospects in the biological and chemical fields.
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)
