Polarization is one of the fundamental physical quantities of light and has been applied in many fields. Traditional bulky polarimeters have a large size and the reported chip-scale polarimeters usually need rigid parameter design. Here, we propose an on-chip Stokes polarimeter based on a two-dimensional grating with loose constraints. The two-dimensional grating splits the x and y polarization components of incident light to four separate branches, then recombined into four new channels to get different polarization information. The Stokes parameters of input light can be retrieved according to the inherent output power matrix of new channels. The measured root mean squared errors of ellipticity angle and orientation angle are 1.82 degree and 2.33 degree respectively. Our work provides an on-chip polarimeter solution with a large fabrication tolerance.
{"title":"On-chip Stokes Polarimeter Based on a Two-dimensional Grating","authors":"Yanxian Wei, Hailong Zhou, Jianji Dong, Xinliang Zhang","doi":"10.1109/PIERS-Fall48861.2019.9021695","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021695","url":null,"abstract":"Polarization is one of the fundamental physical quantities of light and has been applied in many fields. Traditional bulky polarimeters have a large size and the reported chip-scale polarimeters usually need rigid parameter design. Here, we propose an on-chip Stokes polarimeter based on a two-dimensional grating with loose constraints. The two-dimensional grating splits the x and y polarization components of incident light to four separate branches, then recombined into four new channels to get different polarization information. The Stokes parameters of input light can be retrieved according to the inherent output power matrix of new channels. The measured root mean squared errors of ellipticity angle and orientation angle are 1.82 degree and 2.33 degree respectively. Our work provides an on-chip polarimeter solution with a large fabrication tolerance.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124677598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021766
Jialin Shi, Zusheng Jin, Jianxuan Li, Anxia Jiao
This paper first analyzes the ionosphere loss model is established based on analytic method, a nonlinear sea spectrum as the theoretical foundation of ship swaying in the waves of the sea model is set up, and then the numerical method is adopted to establish the waves with the wind blowing the typical three-dimensional model, and converted into a mathematical model of ship longitudinal and transverse swing and using high frequency approximation method to calculate the surface of radio navigation signal amplitude and phase of contribution, finally through the simulation data post-processing and statistical analysis, got the Marine radio navigation signals compensation strategy and specific methods.
{"title":"Accuracy Analysis and Ionospheric Compensation of Radio Navigation and Positioning System under Dynamic Sea Surface Background","authors":"Jialin Shi, Zusheng Jin, Jianxuan Li, Anxia Jiao","doi":"10.1109/PIERS-Fall48861.2019.9021766","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021766","url":null,"abstract":"This paper first analyzes the ionosphere loss model is established based on analytic method, a nonlinear sea spectrum as the theoretical foundation of ship swaying in the waves of the sea model is set up, and then the numerical method is adopted to establish the waves with the wind blowing the typical three-dimensional model, and converted into a mathematical model of ship longitudinal and transverse swing and using high frequency approximation method to calculate the surface of radio navigation signal amplitude and phase of contribution, finally through the simulation data post-processing and statistical analysis, got the Marine radio navigation signals compensation strategy and specific methods.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124970571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021820
Rui Wang, L. Tao, Mengxue Li, Zhili Wang, H. Tan
This paper proposes a Frequency Hopping (FH) communication system with a novel frequency synthesis method. Considering that the existing frequency synthesis methods are inevitably limited by the electronic device bandwidth, a combination of directly modulated laser (DML) and optical heterodyne technique is proposed as a hopping frequency source. The principle of the method is presented and a dual frequency hopping system in E band is carried out through simulation to verified the feasibility of the proposed method. This frequency synthesis method supports high radio frequency, ultra-wideband and high hopping speed.
{"title":"A Frequency Hopping Communication System Using Directly Modulated Laser Based Optical Heterodyne Technique","authors":"Rui Wang, L. Tao, Mengxue Li, Zhili Wang, H. Tan","doi":"10.1109/PIERS-Fall48861.2019.9021820","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021820","url":null,"abstract":"This paper proposes a Frequency Hopping (FH) communication system with a novel frequency synthesis method. Considering that the existing frequency synthesis methods are inevitably limited by the electronic device bandwidth, a combination of directly modulated laser (DML) and optical heterodyne technique is proposed as a hopping frequency source. The principle of the method is presented and a dual frequency hopping system in E band is carried out through simulation to verified the feasibility of the proposed method. This frequency synthesis method supports high radio frequency, ultra-wideband and high hopping speed.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126802189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021330
Zhen-Xing Xia, K. Leung
A 3D-printed wideband rectangular dielectric resonator antenna (DRA) with omnidirectional radiation patterns is investigated. It is a multilayered design with four concentric square dielectric rings, which have progressively decreased effective dielectric constants in the azimuthal direction. To facilitate the 3D printing, a unit cubic cell that can be easily adjusted to provide different effective dielectric constants is used in our design. Three quasi transverse magnetic (TM) modes (quasi-TM01δ, quasi-TM02δ, and quasi-TM03δ) of the DRA are simultaneously excited by a centrally penetrated coaxial probe. By merging these quasi-TM modes together, the DRA with a wide impedance bandwidth is obtained. For demonstration, a prototype working in C-band is designed and printed. Measured results show that our design has a wide 10 dB impedance bandwidth of 44.8% (5.20-8.20 GHz), fully covering the current 5.8 GHz WLAN band (5.725-5.875 GHz). Also, fairly stable radiation patterns can be observed across the impedance passband (5.20-8.20 GHz).
{"title":"3D-printed Wideband Rectangular Dielectric Resonator Antenna","authors":"Zhen-Xing Xia, K. Leung","doi":"10.1109/PIERS-Fall48861.2019.9021330","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021330","url":null,"abstract":"A 3D-printed wideband rectangular dielectric resonator antenna (DRA) with omnidirectional radiation patterns is investigated. It is a multilayered design with four concentric square dielectric rings, which have progressively decreased effective dielectric constants in the azimuthal direction. To facilitate the 3D printing, a unit cubic cell that can be easily adjusted to provide different effective dielectric constants is used in our design. Three quasi transverse magnetic (TM) modes (quasi-TM01δ, quasi-TM02δ, and quasi-TM03δ) of the DRA are simultaneously excited by a centrally penetrated coaxial probe. By merging these quasi-TM modes together, the DRA with a wide impedance bandwidth is obtained. For demonstration, a prototype working in C-band is designed and printed. Measured results show that our design has a wide 10 dB impedance bandwidth of 44.8% (5.20-8.20 GHz), fully covering the current 5.8 GHz WLAN band (5.725-5.875 GHz). Also, fairly stable radiation patterns can be observed across the impedance passband (5.20-8.20 GHz).","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124112980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021795
Chao Liu, Yu Liu
In the time domain finite difference (FDTD) simulation of metal nanostructure, the computational accuracy strongly relies on the accuracy of the permittivity description by means of metal dispersion model over the range of wavelengths of interest. In this paper, several typical metal dispersion models for the description of silver dielectric functions are discussed, including Drude, Drude-2lorentz and Drude2cp (Critical Point) models. The deviations of the dielectric constant between the different dispersion models and the real silver are compared and analyzed. Moreover, using the FDTD method and the dispersion model, the transmission characteristics of silver nanostructure are simulated, and the effects of different dispersion models on the transmission spectra are discussed. Numerical studies show that the transmittance is affected by the dispersion model. The accuracy of the Drude model and the Drude2cp model is similar when the optical frequency is lower. The interband transition effect of the silver is enhanced when the optical frequency increases, and the precision of the Drude2cp model is significantly better than other dispersion models. The artificial red-shift of the transmission formant of silver nanostructure is discovered at higher frequency by using the Drude model and the Drude-2lorentz model. Nevertheless, the shift of transmission formant is not caused by using the Drude2cp model.
{"title":"Comparison of Dispersion Models for the Silver Nanostructure in FDTD Simulations","authors":"Chao Liu, Yu Liu","doi":"10.1109/PIERS-Fall48861.2019.9021795","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021795","url":null,"abstract":"In the time domain finite difference (FDTD) simulation of metal nanostructure, the computational accuracy strongly relies on the accuracy of the permittivity description by means of metal dispersion model over the range of wavelengths of interest. In this paper, several typical metal dispersion models for the description of silver dielectric functions are discussed, including Drude, Drude-2lorentz and Drude2cp (Critical Point) models. The deviations of the dielectric constant between the different dispersion models and the real silver are compared and analyzed. Moreover, using the FDTD method and the dispersion model, the transmission characteristics of silver nanostructure are simulated, and the effects of different dispersion models on the transmission spectra are discussed. Numerical studies show that the transmittance is affected by the dispersion model. The accuracy of the Drude model and the Drude2cp model is similar when the optical frequency is lower. The interband transition effect of the silver is enhanced when the optical frequency increases, and the precision of the Drude2cp model is significantly better than other dispersion models. The artificial red-shift of the transmission formant of silver nanostructure is discovered at higher frequency by using the Drude model and the Drude-2lorentz model. Nevertheless, the shift of transmission formant is not caused by using the Drude2cp model.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123664710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021919
Zi Ruo Chen, Kai Kai Guan, M. Tong
The array antenna pattern synthesis has an important application in wireless communications. The traditional optimization method has a poor performance and the standard particle swarm optimization algorithm (SPSOA) is easily trapped in a local optimal solution due to the premature convergence. Therefore, the adaptive chaotic particle swarm optimization algorithm (ACPSOA) is proposed to improve the SPSOA. The ACPSOA adjusts the linearly decreasing weight to the adaptive inertia weight, and then introduces chaos sequence in the iteration process, which improves the search ability of the algorithm and increases the convergence speed. In this work, the ACPSOA is improved and is used to synthesize the array antenna pattern whose efficiency and accuracy are demonstrated by simulation results.
{"title":"An Improved Adaptive Chaotic Particle Swarm Optimization Algorithm for Antenna Synthesis","authors":"Zi Ruo Chen, Kai Kai Guan, M. Tong","doi":"10.1109/PIERS-Fall48861.2019.9021919","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021919","url":null,"abstract":"The array antenna pattern synthesis has an important application in wireless communications. The traditional optimization method has a poor performance and the standard particle swarm optimization algorithm (SPSOA) is easily trapped in a local optimal solution due to the premature convergence. Therefore, the adaptive chaotic particle swarm optimization algorithm (ACPSOA) is proposed to improve the SPSOA. The ACPSOA adjusts the linearly decreasing weight to the adaptive inertia weight, and then introduces chaos sequence in the iteration process, which improves the search ability of the algorithm and increases the convergence speed. In this work, the ACPSOA is improved and is used to synthesize the array antenna pattern whose efficiency and accuracy are demonstrated by simulation results.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114233717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021765
Zhaohui Zhang, Jinggang Yang, Jun Jia, Jiangtao Xu, Ziquan Liu, Fengbo Tao, Y. Zhou
The microwave-based liquid sensors are indispensable techniques which can provide many advantages such as low cost, real time and label free for biological or chemical measurements. Metamaterials are well suitable for sensing applications due to the narrow spectral feature. A flexible plasmonic microfluidic sensor has been proposed to obtain a non-invasive measurement of different liquid solutions. The resonance frequency changes from 5.133 GHz to 5.006 GHz, with a frequency shift of 127 MHz, when the microfluidic channel is filled with deionized (DI) water.
{"title":"Flexible Multi-band Antenna for Body Area Wireless Sensor Networks","authors":"Zhaohui Zhang, Jinggang Yang, Jun Jia, Jiangtao Xu, Ziquan Liu, Fengbo Tao, Y. Zhou","doi":"10.1109/PIERS-Fall48861.2019.9021765","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021765","url":null,"abstract":"The microwave-based liquid sensors are indispensable techniques which can provide many advantages such as low cost, real time and label free for biological or chemical measurements. Metamaterials are well suitable for sensing applications due to the narrow spectral feature. A flexible plasmonic microfluidic sensor has been proposed to obtain a non-invasive measurement of different liquid solutions. The resonance frequency changes from 5.133 GHz to 5.006 GHz, with a frequency shift of 127 MHz, when the microfluidic channel is filled with deionized (DI) water.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116197419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021670
Chuantao Zheng, Kaiyuan Zheng, Qixin He, W. Ye, Yu Zhang, Yiding Wang, F. Tittel
Chemical gas-phase analysis is significant in physics, chemistry, space science, industrial process control as well as in atmospheric applications. Fundamental requirements for chemical analysis and gas sensing include sensitivity, selectivity, portability and affordability. The application of cavity-enhanced laser absorption spectroscopy (CEAS) techniques in the near- and mid-infrared for gas sensing was studied, including the mode-locked cavity-enhanced absorption spectroscopy (ML-CEAS), off-axis integrated cavity output absorption spectroscopy (OA-ICOS), and incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS). In terms of ML- CEAS technique, a near-infrared Pound-Drever-Hall (PDH)-based mode-locked cavity-enhanced gas sensor system was developed for water vapor (H2O) detection; a mid-infrared cavity-enhanced H2CO sensor system was demonstrated using a continuous-wave (CW) interband cascade laser (ICL) as light source. In terms of OA-ICOS technique, a near-infrared sensor system based on an ultra-compact cage-based absorption cell was proposed for highly sensitive and accurate acetylene (C2H2 ) detection; by combining frequency division multiplexing assisted wavelength modulation spectroscopy (FDM-WMS) and OA-ICOS, a near-infrared dual-gas sensor system was demonstrated for simultaneous chemical gas-phase detection of C2H2 and methane (CH4 ). In terms of IBBCEAS technique, a broadband cavity-enhanced sensor system in combination with a Fourier-transform spectrometer (FTS) in the near-infrared region was demonstrated for CH4 detection; a near-infrared broadband cavity-enhanced sensor system was demonstrated for the first time for C2H2 and CH4 detection using an energy-efficient light emitting diode (LED) with a central emission wavelength at 1650 nm and a light power of ~ 16mW employing two detection schemes, i.e., NIRQuest In GaAs spectrometer and scanning monochromator combined with phase-sensitive detection. The three techniques demonstrated can be properly selected due to their pros and cons for practical gas sensing applications and can also be capable for remote gas sensing.
化学气相分析在物理、化学、空间科学、工业过程控制以及大气应用中具有重要意义。化学分析和气体传感的基本要求包括灵敏度、选择性、便携性和可负担性。研究了锁模腔增强激光吸收光谱(ML-CEAS)、离轴集成腔输出吸收光谱(OA-ICOS)和非相干宽带腔增强吸收光谱(IBBCEAS)技术在近红外和中红外气体传感中的应用。在ML- CEAS技术方面，开发了一种基于Pound-Drever-Hall (PDH)的近红外锁模腔增强气体传感器系统，用于检测水蒸气(H2O);采用连续波(CW)带间级联激光器(ICL)作为光源，演示了一种中红外腔增强H2CO传感器系统。在OA-ICOS技术方面，提出了一种基于超紧凑笼型吸收池的近红外传感器系统，用于高灵敏度、高精度的乙炔(C2H2)检测;采用频分复用辅助波长调制光谱(FDM-WMS)和OA-ICOS相结合的方法，建立了用于化学气相检测C2H2和甲烷(CH4)的近红外双气敏系统。在IBBCEAS技术方面，提出了一种结合近红外傅立叶变换光谱仪(FTS)的宽带腔增强传感器系统，用于CH4的检测;采用niquest In GaAs光谱仪和扫描单色器相敏检测两种检测方案，首次实现了一种中心发射波长为1650 nm、光功率为~ 16mW的近红外宽带腔增强C2H2和CH4检测系统。由于实际气体传感应用的优点和缺点，可以正确选择所演示的三种技术，也可以用于远程气体传感。
{"title":"Cavity-enhanced Absorption Spectroscopy in the Near- and Mid-infrared for Gas Sensing","authors":"Chuantao Zheng, Kaiyuan Zheng, Qixin He, W. Ye, Yu Zhang, Yiding Wang, F. Tittel","doi":"10.1109/PIERS-Fall48861.2019.9021670","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021670","url":null,"abstract":"Chemical gas-phase analysis is significant in physics, chemistry, space science, industrial process control as well as in atmospheric applications. Fundamental requirements for chemical analysis and gas sensing include sensitivity, selectivity, portability and affordability. The application of cavity-enhanced laser absorption spectroscopy (CEAS) techniques in the near- and mid-infrared for gas sensing was studied, including the mode-locked cavity-enhanced absorption spectroscopy (ML-CEAS), off-axis integrated cavity output absorption spectroscopy (OA-ICOS), and incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS). In terms of ML- CEAS technique, a near-infrared Pound-Drever-Hall (PDH)-based mode-locked cavity-enhanced gas sensor system was developed for water vapor (H2O) detection; a mid-infrared cavity-enhanced H2CO sensor system was demonstrated using a continuous-wave (CW) interband cascade laser (ICL) as light source. In terms of OA-ICOS technique, a near-infrared sensor system based on an ultra-compact cage-based absorption cell was proposed for highly sensitive and accurate acetylene (C2H2 ) detection; by combining frequency division multiplexing assisted wavelength modulation spectroscopy (FDM-WMS) and OA-ICOS, a near-infrared dual-gas sensor system was demonstrated for simultaneous chemical gas-phase detection of C2H2 and methane (CH4 ). In terms of IBBCEAS technique, a broadband cavity-enhanced sensor system in combination with a Fourier-transform spectrometer (FTS) in the near-infrared region was demonstrated for CH4 detection; a near-infrared broadband cavity-enhanced sensor system was demonstrated for the first time for C2H2 and CH4 detection using an energy-efficient light emitting diode (LED) with a central emission wavelength at 1650 nm and a light power of ~ 16mW employing two detection schemes, i.e., NIRQuest In GaAs spectrometer and scanning monochromator combined with phase-sensitive detection. The three techniques demonstrated can be properly selected due to their pros and cons for practical gas sensing applications and can also be capable for remote gas sensing.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116335999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021764
Lei Zhang, Haoyan Wang, Jincheng Dai, Xin Fu, Lin Yang
We propose two kinds of architectures based on cascaded feed-forward microring resonators (MRRs) for integrated optical bandpass filtering. We compare the performance of the two proposed filters with traditional high-order MRRs composed of the same number of ring cavities using the scattering matrix method. For the same target 3 dB bandwidth of 15 GHz or 5 GHz, the proposed optical filters shows different line shape with lower insertion loss and different roll-off feature. As a proof of concept, we fabricate the device with three MRRs on a silicon-on-insulator (SOI) substrate using deep ultraviolet photolithography. The device shows a 3 dB bandwidth of ~25 GHz and an on-chip insertion loss of −2.5 dB. The roll-off rates are around 45 dB/nm at the sideband points −10 dB and −20 dB lower than the passband center. In contrast, the transmission’s roll-off rates of a single MRR in the device are ~22 dB/nm and ~6 dB/nm at the −10 dB and −20 dB sideband points, respectively. Compared with traditional high-order MRRs, our schemes have lower thermal crosstalk because the resonators are not tightly coupled and thus can be placed far apart. The performance of the proposed structures can be further improved by replacing the MRRs with micro-disk resonators or high-order MRRs.
{"title":"Low-loss Silicon Optical Filter with Narrow Bandwidth and Steep Roll-off Based on Cascaded Feed-forward Microring Resonators","authors":"Lei Zhang, Haoyan Wang, Jincheng Dai, Xin Fu, Lin Yang","doi":"10.1109/PIERS-Fall48861.2019.9021764","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021764","url":null,"abstract":"We propose two kinds of architectures based on cascaded feed-forward microring resonators (MRRs) for integrated optical bandpass filtering. We compare the performance of the two proposed filters with traditional high-order MRRs composed of the same number of ring cavities using the scattering matrix method. For the same target 3 dB bandwidth of 15 GHz or 5 GHz, the proposed optical filters shows different line shape with lower insertion loss and different roll-off feature. As a proof of concept, we fabricate the device with three MRRs on a silicon-on-insulator (SOI) substrate using deep ultraviolet photolithography. The device shows a 3 dB bandwidth of ~25 GHz and an on-chip insertion loss of −2.5 dB. The roll-off rates are around 45 dB/nm at the sideband points −10 dB and −20 dB lower than the passband center. In contrast, the transmission’s roll-off rates of a single MRR in the device are ~22 dB/nm and ~6 dB/nm at the −10 dB and −20 dB sideband points, respectively. Compared with traditional high-order MRRs, our schemes have lower thermal crosstalk because the resonators are not tightly coupled and thus can be placed far apart. The performance of the proposed structures can be further improved by replacing the MRRs with micro-disk resonators or high-order MRRs.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116344190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An electronically reconfigurable unit with 1-bit phase resolution is presented for direct-radiating programable metasurfaces in X-band. Compared with the traditional transmissive or reflective metasurfaces, the feeder source is integrated into the unit infrastructure of the direct-radiating metasurfaces for a lower profile. The phase difference of the two states maintains at around 180° with very small deviation within the operation band. The simulated results verify that the proposed reconfigurable direct-radiating unit can achieve good 1-bit phase tuning with minimum return losses and efficient radiations.
{"title":"1-bit Reconfigurable Unit Cell for Direct-radiating Programable Metasurfaces","authors":"X. Bai, Mengmeng Sun, Yanting Lv, A. Cao, Chong He, Weiren Zhu","doi":"10.1109/PIERS-Fall48861.2019.9021407","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021407","url":null,"abstract":"An electronically reconfigurable unit with 1-bit phase resolution is presented for direct-radiating programable metasurfaces in X-band. Compared with the traditional transmissive or reflective metasurfaces, the feeder source is integrated into the unit infrastructure of the direct-radiating metasurfaces for a lower profile. The phase difference of the two states maintains at around 180° with very small deviation within the operation band. The simulated results verify that the proposed reconfigurable direct-radiating unit can achieve good 1-bit phase tuning with minimum return losses and efficient radiations.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124377328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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