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Scalable on-chip diffractive speckle spectrometer with high spectral channel density

光：科学与应用（英文版） 2025年第5期14卷 1324-1333页

作者： Zimeng Zhang Shumin Xiao Qinghai Song Ke Xu Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of TechnologyShenzhenChina Department of Integrated Circuits Harbin Institute of TechnologyShenzhenChina Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of TechnologyShenzhenChina

The chip-scale integrated spectrometers are opening new avenues for a much wider range of applications than their conventional benchtop *** spectral reconstruction should be in command of both spectral resolution and bandwidth,a large number of spectral channels is among the key goals of the spectrometer ***,the chip footprint eventually limits the spectral channel capacities of well-established spectral-to-spatial mapping structures like dispersive elements,filter arrays,random media,and so *** we suggest an alternative scheme by encoding the spectral information using on-chip diffractive *** in-plane metasurface is capable of producing intensity speckles to resolve the *** spectral richness is greatly increased by scaling the architecture via three layers of cascaded *** readout of speckles is realized by two-dimensional imaging of the grating-diffracted pattern,enabling a large matrix for spectrum *** spectrometer has a resolution of 70 pm over a bandwidth of 100 *** to 1400 spectral channels were obtained within a compact chip area of only 150 μm×950 μ*** on-chip diffractive spectrometer has a benchmark channel density of up to 10021 ch/mm2,which compares favorably against other state-of-art waveguide structures.

关键词： channel density high with diffractive on-chip scalable speckle spectral spectrometer

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High-efficiency 2 μm band interleaved-etch grating coupler optimized using edge optimization algorithm

High-efficiency 2 μm band interleaved-etch grating coupler ...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Wu, Yifan Li, Yihang Wang, Tao Wang, Jianing Zhong, Rui Xu, Ke Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Department of Integrated Circuits Harbin Institute of Technology Shenzhen China Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen China

Optimized grating coupler for 220 nm silicon SOI platform achieves 71.7% efficiency at 2 μm. Inverse design algorithm controls grating groove edges, optimizes diffraction mode field. Interlaced-etching structure enha... 详细信息

ISBN: (纸本)9798350379266

关键词： Inverse problems

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Highly efficient silicon Michelson interferometer modulator at 2 μm waveband

Highly efficient silicon Michelson interferometer modulator ...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Wang, Xi Wang, Jianing Li, Yihang Yao, Yong Yang, Yanfu Xu, Ke Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Department of Integrated Circuits Harbin Institute of Technology Shenzhen China Department of Integrated Circuits Harbin Institute of Technology Shenzhen China

We have experimentally demonstrated highly efficient silicon Michelson interferometer modulator with a modulation efficiency of 0.32 V‧cm at 2 μm waveband.A modulation speed of 30 Gbit/s is achieved. © 2024 IEEE.

ISBN: (纸本)9798350379266

关键词： Michelson interferometers

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High-Speed 2 μm Silicon Photonic Mach-Zehnder Modulator with 30 GHz Bandwidth

High-Speed 2 μm Silicon Photonic Mach-Zehnder Modulator wit...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Wang, Jianing Zhang, Xuelin Wang, Xi Yang, Yanfu Du, Jiangbing Xu, Ke Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Department of Integrated Circuits Harbin Institute of Technology Shenzhen China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Department of Integrated Circuits Harbin Institute of Technology Shenzhen China

ISBN: (纸本)9798350379266

关键词： Silicon photonics

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Ferroelectric-controlled graphene plasmonic surfaces for all-optical neuromorphic vision

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Science China(Technological Sciences) 2024年第3期67卷 765-773页

作者： CHEN JianBo LIU Yu LI ShangDong LIN Lin LI YaDong HUANG Wen GUO JunXiong School of Electronic Information and Electrical Engineering Institute for Advanced StudyChengdu UniversityChengdu 610106China School of Integrated Circuits Tsinghua UniversityBeijing 100084China School of Integrated Circuits(National Exemplary Schoolof Microelectronics) Universityof Electronic Science and Technologyof China Chengdu 610054China Jincheng Research Institute of Opto-mechatronics Industry Jincheng 048000China Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems Jincheng 048000China Engineering Research Center of Digital Imaging and Display Ministry of EducationSoochow UniversitySuzhou 215006China

Artificial visual systems can recognize desired objects and information from complex environments, and are therefore highly desired for pattern recognition, object detection, and imaging applications. However, state-of-the-art artificial visual systems with high recognition performances that typically consist of electronic devices face the challenges of requiring huge storage space and high power consumption owing to redundant data. Here, we report a terahertz(THz) frequency-selective surface using a graphene split-ring resonator driven by ferroelectric polarization for efficient visual system applications. The downward polarization of the ferroelectric material offers an ultrahigh electrostatic field for doping p-type graphene with an anticipated Fermi level. By optimizing the geometric parameters of the devices and modulating the carrier behaviors of graphene, our plasmonic devices exhibit a tunable spectral response in a range of 1.7–6.0 THz with continuous transmission values. The alloptical neural network using graphene plasmonic surfaces designed in this study exhibited excellent performance in visual preprocessing and convolutional filtering and achieved an ultrahigh recognition accuracy of up to 99.3% in training the Modified National Institute of Standards and Technology(MNIST) handwritten digit dataset. These features demonstrate the great potential of graphene plasmonic devices for future smart artificial vision systems.

关键词： graphene plasmon ferroelectric frequency selective surface artificial vision system

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Achieving highly-efficient H2S gas sensor by flower-like SnO_(2)–SnO/porous GaN heterojunction

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Chinese Physics B 2023年第2期32卷 193-200页

作者：刘增都灵张少辉边昂方君鹏邢晨阳李山汤谨诚郭宇锋唐为华 College of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Electronic and Information Engineering Jinling Institute of TechnologyNanjing 211169China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China Key Laboratory of Luminescence and Optical Information of Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong UniversityBeijing 100044China School of Integrated Circuits Tsinghua UniversityBeijing 100044China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

A flower-like SnO_(2)–SnO/porous Ga N(FSS/PGaN) heterojunction was fabricated for the first time via a facile spraying process, and the whole process also involved hydrothermal preparation of FSS and electrochemical wet etching of GaN,and SnO_(2)–SnO composites with p–n junctions were loaded onto PGaN surface directly applied to H_(2)S sensor. Meanwhile,the excellent transport capability of heterojunction between FSS and PGaN facilitates electron transfer, that is, a response time as short as 65 s and a release time up to 27 s can be achieved merely at 150℃ under 50 ppm H_(2)S concentration, which has laid a reasonable theoretical and experimental foundation for the subsequent PGaN-based heterojunction gas *** lowering working temperature and high sensitivity(23.5 at 200 ppm H2S) are attributed to the structure of PGaN itself and the heterojunction between SnO_(2)–SnO and PGaN. In addition, the as-obtained sensor showed ultra-high test *** simple design strategy of FSS/PGaN-based H_(2)S sensor highlights its potential in various applications.

关键词： gas sensor SnO_(2)–SnO porous GaN heterojunction

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A Flexible Bulk Acoustic Resonator Radio-Frequency Sensor Based on Peta/Pb1.2(Zr0.52Ti0.48)O3/Polymer Films Detecting Human Respiratory Humidity

SSRN

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SSRN 2024年

作者： Wei, Tianyu Dong, Bo Hu, Yuxuan Lin, Pofeng Huang, Wobin IOT Photonic Integrated Devices And Systems Laboratory College of Integrated Circuits and Optoelectronic Chips Shenzhen Technology University Shenzhen518118 China

A flexible bulk acoustic resonator radio frequency (RF) sensor has been developed utilizing a PETA/Pb1.2(Zr0.52Ti0.48)O3/polymer thin film configuration, tailored for detecting human respiratory humidity. Leveraging the exceptional water absorption properties of PETA and the impressive piezoelectric effect of Pb1.2(Zr0.52Ti0.48)O3, the sensor exhibits outstanding flexibility and sensitivity to humidity changes. Experimental analysis conducted under controlled humidity conditions using an RF test setup demonstrates the sensor's high accuracy and rapid response time in detecting human respiratory humidity. Notably, the sensor displays a strong linear correlation between resonant frequency and humidity level within the relative humidity range of 65% to 86%, with a correlation coefficient reaching 0.99. This aligns with the typical humidity range of exhaled water vapor from the human body, with a measured response time of 1.79 seconds. Remarkably, the sensor remains insensitive to temperature fluctuations, ensuring consistent performance across varying environmental conditions. Moreover, its flexible design enables seamless integration into wearable devices, facilitating real-time monitoring of respiratory conditions and enhancing healthcare outcomes. This innovative sensor marks a significant advancement in RF sensing technology, holding immense promise for personalized health monitoring and healthcare applications. © 2024, The Authors. All rights reserved.

关键词： Thin films

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A Strategy to Increase the Strengthness and Toughness of Epoxy Hybrid Composites 10

A Strategy to Increase the Strengthness and Toughness of Epo...

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2024 10th International Conference on Applied Materials and Manufacturing Technology, ICAMMT 2024

作者： Li, Liyuan Li, Jinhui Lv, Xialei Niu, Fangfang Sun, Rong National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic Materials Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Shenzhen518055 China Henan Key Laboratory of Energy Storage Materials and Processes Zhengzhou Institute of Emerging Industrial Technology Henan Zhengzhou450003 China Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Guangdong Shenzhen518060 China

Bisphenol A and its congeneric compounds are key materials in photosensitive solder mask inks to improve the toughness property. However, the cured epoxy resins often exhibit brittleness and restrict their usability in solder mask inks. A series of reinforced and toughened curing epoxy resins were prepared by incorporating core-shell rubber (CSR) and nano SiO2 into diglycidyl ether of bisphenol A (DGEBA). A comprehensive investigation was executed to analyze the influence of different contents of CSR and CSR/SiO2 on the curing process, network characteristics, and mechanical properties of epoxy resins. The experimental data deliver that the introduction of CSR/SiO2 in appropriate proportions could boost the toughness and strength of cured epoxy resin significantly, while thermal stability is also improved. Nano SiO2, with its high surface area and unique surface properties, can act as a reinforcing filler, enhancing the mechanical properties of the epoxy resin, while CSR provides both strength and toughness to the composite. The fracture surface of CSR/SiO2-modified epoxy resin also demonstrates that the CSR and SiO2 nanoparticles in the epoxy matrix could effectively block the development of cracks and produce plastic deformation around the material when the material is subjected to external forces. Therefore, the prepared high-performance CSR/SiO2-based DGEBA showed great potential in solder mask inks. © Published under licence by IOP Publishing Ltd.

关键词： Hybrid composites

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High-Efficiency 2 µm Band Interleaved-Etch Grating Coupler Optimized Using Edge Optimization Algorithm

High-Efficiency 2 µm Band Interleaved-Etch Grating Coupler ...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Yifan Wu Yihang Li Tao Wang Jianing Wang Rui Zhong Ke Xu Department of Integrated Circuits Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology Shenzhen China Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen China

Optimized grating coupler for 220 nm silicon SOI platform achieves 71.7% efficiency at 2 µm. Inverse design algorithm controls grating groove edges, optimizes diffraction mode field. Interlaced-etching structure ... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Couplings Diffraction Asia Couplers Diffraction gratings Silicon Optical fiber communication Gratings Optimization Photonics

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A Flexible Film Bulk Acoustic Resonator Radio-Frequency Sensor Based on Β-Type Pvdf Films for Tactile Perception

SSRN

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SSRN 2024年

作者： Wei, Tianyu Dong, Bo Hu, Yuxuan He, Shuqing Lin, Pofeng Huang, Wobin IOT Photonic Integrated Devices And Systems Laboratory College of Integrated Circuits and Optoelectronic Chips Shenzhen Technology University Shenzhen518118 China

A flexible Film Bulk Acoustic Resonator(FBAR) Radio-Frequency(RF) sensor based on a flexible substrate and β-type Polyvinylidene fluoride (PVDF) film is proposed for tactile perception. The molecule chains of the β-type PVDF film have a spontaneously polarized structure, showing the high piezoelectric characteristic. The FBAR structure is a sandwiched Al/β-PVDF/Al structure on a flexible polyimide (PI) film substrate. Experimental results show that the resonance frequency of the RF sensor is around 258MHz, and it shows high bending and pressure sensitivities with a bending sensitivity of 330KHz/mm-1, a compressive pressure sensitivity of 4.7KHz/Pa, and a lower temperature drift temperature coefficient of frequency (TCF) of -63ppm/℃. The device exhibits the advantages of high sensitivity, high signal-to-noise ratio, compact structure, and temperature insensitivity. It is expected to have potential applications in wearable devices, robots, soft touch, medical diagnosis, and so on. © 2024, The Authors. All rights reserved.

关键词： Diagnosis

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