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学者姓名：王鹏飞
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Abstract ：
The Risley -prism imaging system (RPIS) is a powerful way to achieve bionic human eye imaging with great advantages on large field of view (FOV) and variable resolution imaging owing to the autonomous controlled deflection of light. But the imaging dispersion originating from nonlinear and uneven light deflection results in limited imaging wavelength that seriously hinders its application. The existing solutions for imaging dispersion mainly rely on the hardware, which generally has bulky structure and limited improvement on image. Besides, the existing image evaluation methods for dispersion are not suitable for RPIS due to inhomogeneous dispersion. Herein, this paper systematically analyzes the mechanism and characteristics of dispersion in the RPIS, and proposes a cooperative correction method for image distortion and dispersion of multiple -color imaging, achieving the elimination of distortion and dispersion simultaneously without changing the optical structure. A dispersion evaluation index based on Pearson's correlation coefficient (PCC) is also established, and the objectivity and validity of the index are proved by experiments. Furthermore, a kind of compact RPIS based on an RGB camera is built, and both indoor and outdoor experiments are conducted. The experimental results demonstrate that proposed algorithm has strong universality and robustness for various scenes and targets. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Huang, Feng , Huang, Duanhao , Yang, Shumin et al. Cooperative correction method for distortion and dispersion of deflected field of view in Risley-prism bionic-human-eye imaging systems [J]. | OPTICS EXPRESS , 2024 , 32 (4) . |
| MLA | Huang, Feng et al. "Cooperative correction method for distortion and dispersion of deflected field of view in Risley-prism bionic-human-eye imaging systems" . | OPTICS EXPRESS 32 . 4 (2024) . |
| APA | Huang, Feng , Huang, Duanhao , Yang, Shumin , Wang, Pengfei . Cooperative correction method for distortion and dispersion of deflected field of view in Risley-prism bionic-human-eye imaging systems . | OPTICS EXPRESS , 2024 , 32 (4) . |
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The performance of photothermoelectric materials is severely limited by various intrinsic parameters that are difficult to simultaneously modulate, thereby hindering their applications in the fields of photodetectors, solar cells, thermoelectric therapy and so on. In this study, we have prepared suspended films composed of carbon nanotube (CNT) and molybdenum disulfide quantum dots (MoS2 QDs), which demonstrate a remarkable maximum photothermal conversion efficiency of 2201 K·mm2·W−1. This outstanding performance is attributed to the formation of a heterojunction between CNT and MoS2 QDs. Furthermore, the light absorption, temperature coefficient of resistance, and Seebeck coefficient of this suspended film are simultaneously modulated in a direction conducive to enhancing the photothermoelectric effect. Consequently, we have fabricated CNT-CNT/MoS2 QDs p-n junction photodetectors to showcase the improved photoresponse performance. This study presents an innovative approach for modulating multiple intrinsic parameters of photothermoelectric materials, which offers valuable insights for enhancing the performance of corresponding photothermoelectric devices. © 2024 The Authors
Keyword ：
Carbon disulfide Carbon disulfide Carbon films Carbon films Carbon nanotubes Carbon nanotubes Conversion efficiency Conversion efficiency Heterojunctions Heterojunctions Layered semiconductors Layered semiconductors Light absorption Light absorption Molybdenum disulfide Molybdenum disulfide Photodetectors Photodetectors Photons Photons Semiconductor quantum dots Semiconductor quantum dots
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| GB/T 7714 | Liu, Yu , Lin, Zhicheng , Wang, Pengfei et al. Enhancement of the photothermoelectric effect through synergistic modulation of multiple parameters [J]. | Materials and Design , 2024 , 244 . |
| MLA | Liu, Yu et al. "Enhancement of the photothermoelectric effect through synergistic modulation of multiple parameters" . | Materials and Design 244 (2024) . |
| APA | Liu, Yu , Lin, Zhicheng , Wang, Pengfei , Huang, Feng , Sun, Jia-Lin . Enhancement of the photothermoelectric effect through synergistic modulation of multiple parameters . | Materials and Design , 2024 , 244 . |
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The extinction coefficient is an important parameter for describing light transmitting properties in the scattering medium. However, the single-point detection way and the large inversion error of the existing techniques cannot satisfy the need for spatial analysis and data application. A novel approach for inversion of extinction coefficient based on range-gated detection utilizing backward scattering of medium is proposed, and an inversion algorithm for extinction coefficient is established utilizing the backscattering signal of multiple adjacent spatial slices of the medium. The method can simultaneously invert transverse multiple-points extinction coefficient and longitudinal profile of extinction coefficient. Further, experiments are conducted in the scattering medium including fog and smoke based on the fabricated range-gated extinction-coefficient detection and inversion system, and the results demonstrate that inversion with the error less than 5% can be achieved at different detection distances, different concentrations and different kinds of scattering mediums. This approach offers a convenient, rapid and accurate means to acquire extinction coefficients, laying the foundation for the development of efficient environmental monitoring and high-quality defogging imaging. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
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| GB/T 7714 | Huang, F. , Qiu, S. , Ye, Z. et al. Inversion of extinction coefficient for scattering media based on range-gated detection [J]. | Optics Express , 2024 , 32 (13) : 23547-23560 . |
| MLA | Huang, F. et al. "Inversion of extinction coefficient for scattering media based on range-gated detection" . | Optics Express 32 . 13 (2024) : 23547-23560 . |
| APA | Huang, F. , Qiu, S. , Ye, Z. , Liu, Y. , Wang, P. . Inversion of extinction coefficient for scattering media based on range-gated detection . | Optics Express , 2024 , 32 (13) , 23547-23560 . |
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Imaging through the scattering medium, such as fog, is important for military and civilian applications. However, the fog concentration restricts the current defogging methods; the image will be seriously degraded in dense fog scenes. Here, an imaging technique by developing joint active polarization defogging and denoising optimization methods based on range-gated detection is proposed for the target in fog conditions. The range-gated imaging method shields the scattering light from outside the selected region to improve the signal intensity. The properties of signal light, backscattering light, and forward scattering light in the range-gated imaging way are analyzed experimentally and theoretically. Thus the elimination method of backscattering light is developed in terms of polarization differences in the degree of polarization and angle of polarization, and the block-matching with 3D transform-domain collaborative filtering (BM3D) algorithm is developed to remove the effect of the forward scattering light on the image. By adopting the proposed defogging method, the clear imaging of the target under fog with an optical thickness of up to 5 is realized, and the target contour and detail information are successfully recovered. Compared with the complete failure of the current defogging method, this method can recover targets with high contrast and signal-to-noise ratio in dense fog scenes, which exhibits widespread application potential for target detection and recognition in severe weather and turbid underwater environment.& COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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| GB/T 7714 | Huang, Feng , Qiu, Shaoping , Liu, Hao et al. Active imaging through dense fog by utilizing the joint polarization defogging and denoising optimization based on range-gated detection [J]. | OPTICS EXPRESS , 2023 , 31 (16) : 25527-25544 . |
| MLA | Huang, Feng et al. "Active imaging through dense fog by utilizing the joint polarization defogging and denoising optimization based on range-gated detection" . | OPTICS EXPRESS 31 . 16 (2023) : 25527-25544 . |
| APA | Huang, Feng , Qiu, Shaoping , Liu, Hao , Iu, Yul , Wang, Pengfei . Active imaging through dense fog by utilizing the joint polarization defogging and denoising optimization based on range-gated detection . | OPTICS EXPRESS , 2023 , 31 (16) , 25527-25544 . |
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Photodetectors play a key role in many applications,such as remote sensing,night vision,reconnaissance, medical imaging,thermal imaging,and chemical detection. With the increasing complexity of photoelectric detection tasks,photodetectors working in different bands are gradually integrated into broad spectral detection for the same scene. Limited by the volume and task module of the integrated system,conventional broad spectral detection tasks often require multiple detectors working in different bands to perform together,which greatly increases the complexity of detection system. Therefore,photodetector enables to response ultra-broadband radiation(UV- vis-IR-THz)has gradually become a subject of great interest in recent years. However,there have been no reports on the review of ultra-broadband photodetectors so far. Hence,this review systematically summarizes the research progresses of ultra-broadband photodetectors in the past ten years. The factors affecting the response performance of photodetectors and the main types of common photodetectors are first described,and then the research progress,development status and challenges are reviewed and suggestions about the future research directions of ultra-broadband photodetectors are also provided.
Keyword ：
device type device type photodetector photodetector response performance response performance ultra-broadband ultra-broadband
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| GB/T 7714 | Liu Yu , Lin Zhi-Cheng , Wang Peng-Fei et al. Research progress of ultra-broadband photodetectors [J]. | JOURNAL OF INFRARED AND MILLIMETER WAVES , 2023 , 42 (2) : 169-187 . |
| MLA | Liu Yu et al. "Research progress of ultra-broadband photodetectors" . | JOURNAL OF INFRARED AND MILLIMETER WAVES 42 . 2 (2023) : 169-187 . |
| APA | Liu Yu , Lin Zhi-Cheng , Wang Peng-Fei , Huang Feng , Sun Jia-Lin . Research progress of ultra-broadband photodetectors . | JOURNAL OF INFRARED AND MILLIMETER WAVES , 2023 , 42 (2) , 169-187 . |
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光电探测器在许多应用中发挥着关键作用,例如遥感、夜视、侦察、医学成像、热成像和化学检测.随着光电探测任务的逐渐复杂化,工作在不同波段的光电探测器逐渐被集成用于对同一场景的宽光谱探测.受限于集成系统的体积和任务模块,常规的宽谱探测任务往往需要多个不同波段的探测器协同工作,极大增加了系统复杂度,因此具有超宽带探测(紫外-可见-红外-太赫兹)能力的光电探测器逐渐成为国际研究的前沿热点.但是迄今为止,有关超宽带光电探测器的综述还没有见诸报道.因此,本文系统整理了超宽带光电探测器在过去十年的研究进展.文章首先介绍了衡量光电探测器响应性能的指标以及常见光电探测器的主要类型,在此基础上重点回顾了不同类型超宽带光电探测器的研究进展、发展现状、面临的挑战,并展望了未来的研究方向.
Keyword ：
光电探测器 光电探测器 响应机理 响应机理 器件类型 器件类型 超宽带 超宽带
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| GB/T 7714 | 刘宇 , 林志诚 , 王鹏飞 et al. 超宽带光电探测器研究进展 [J]. | 红外与毫米波学报 , 2023 , 42 (2) : 169-187 . |
| MLA | 刘宇 et al. "超宽带光电探测器研究进展" . | 红外与毫米波学报 42 . 2 (2023) : 169-187 . |
| APA | 刘宇 , 林志诚 , 王鹏飞 , 黄峰 , 孙家林 . 超宽带光电探测器研究进展 . | 红外与毫米波学报 , 2023 , 42 (2) , 169-187 . |
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Current range-gated imaging methods based on triangular or trapezoidal models face significant limitations in terms of the accuracy and precision of three-dimensional (3D) reconstruction. Here, we establish a range-gated 3D super-resolution image reconstruction method based on a Gaussian-range-intensity model. A denoised optimization method for image preprocessing is established to improve the distance accuracy of the reconstruction. The experimental results show that the model can reduce the error of target distance by 64% and possess the reconstruction of multiple kinds of targets with a distance resolution of 1.5 cm and lower noise, realizing better reconstruction results compared with the existing range-gated 3D imaging techniques. (c) 2023 Optica Publishing Group
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| GB/T 7714 | Wang, Pengfei , Liu, Hao , Qiu, Shaoping et al. Three-dimensional super-resolution range-gated imaging based on a Gaussian-range-intensity model [J]. | APPLIED OPTICS , 2023 , 62 (29) : 7633-7642 . |
| MLA | Wang, Pengfei et al. "Three-dimensional super-resolution range-gated imaging based on a Gaussian-range-intensity model" . | APPLIED OPTICS 62 . 29 (2023) : 7633-7642 . |
| APA | Wang, Pengfei , Liu, Hao , Qiu, Shaoping , Liu, Yu , Huang, Feng . Three-dimensional super-resolution range-gated imaging based on a Gaussian-range-intensity model . | APPLIED OPTICS , 2023 , 62 (29) , 7633-7642 . |
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Ultrabroadband photodetectors (PDs) working in the frequency range from the UV to THz regions of the spectrum play a crucial role in integrated multifunction photoelectric detection. Even so, a shortage of high-performance PDs has seriously restricted the overall development of this field. The present work demonstrates a high-performance, ultrabroadband PD with a composite nanostructure comprising a suspended carbon nanotube (CNT) film on which titanium and palladium are deposited. The application of titanium and palladium to the CNT film in this device provides n-doping and p-doping, respectively, and the deposited metal nanoparticles also ensure enhanced thermal localization. This device exhibits short response time, high responsivity, large linear dynamic range, and small noise equivalent power over the ultrabroadband spectrum based on a strong photothermoelectric effect. Numerical simulation results also confirm the effective doping and enhanced thermal localization in this PD resulting from the deposited metals. A theoretical analysis shows that the thermal conductivity of the composite film is no longer independent of the temperature over a wide temperature range. This work provides a simple but novel strategy for the design of high-performance ultrabroadband PDs.
Keyword ：
carbon nanotube film carbon nanotube film metal doping thermal localization metal doping thermal localization photothermoelectric effect photothermoelectric effect ultrabroadband photodetector ultrabroadband photodetector
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| GB/T 7714 | Liu, Yu , Hu, Qianqian , Cao, Yang et al. High-Performance Ultrabroadband Photodetector Based on Photothermoelectric Effect [J]. | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (25) . |
| MLA | Liu, Yu et al. "High-Performance Ultrabroadband Photodetector Based on Photothermoelectric Effect" . | ACS APPLIED MATERIALS & INTERFACES 14 . 25 (2022) . |
| APA | Liu, Yu , Hu, Qianqian , Cao, Yang , Wang, Pengfei , Wei, Jinquan , Wu, Weidong et al. High-Performance Ultrabroadband Photodetector Based on Photothermoelectric Effect . | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (25) . |
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Because carbon nanotube (CNT) films have high photothermal conversion efficiency (PTCE), they have been widely used in bolometric and photothermoelectric photodetectors, seawater desalination, and cancer therapy. Here, we present a simple, quick, and non-destructive method to measure the PTCE of CNT films. According to the linear relationship between the Raman shift of the G(+) peak and the temperature of a CNT, the offset of the G(+) peak under varying excitation light power can characterize the changed temperature. Combining the simulation of the temperature distribution, the final value of the PTCE can be obtained. Finally, a CNT film with a high PTCE was chosen to be fabricated as a bolometric photodetector; a quite high responsivity (2 A W-1 at 532 nm) of this device demonstrated the effectiveness of our method.
Keyword ：
CNT film CNT film photothermal conversion efficiency photothermal conversion efficiency Raman shift Raman shift
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| GB/T 7714 | Liu, Yu , Lin, Zhicheng , Wang, Pengfei et al. Measurement of the Photothermal Conversion Efficiency of CNT Films Utilizing a Raman Spectrum [J]. | NANOMATERIALS , 2022 , 12 (7) . |
| MLA | Liu, Yu et al. "Measurement of the Photothermal Conversion Efficiency of CNT Films Utilizing a Raman Spectrum" . | NANOMATERIALS 12 . 7 (2022) . |
| APA | Liu, Yu , Lin, Zhicheng , Wang, Pengfei , Huang, Feng , Sun, Jia-Lin . Measurement of the Photothermal Conversion Efficiency of CNT Films Utilizing a Raman Spectrum . | NANOMATERIALS , 2022 , 12 (7) . |
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Traditional strategies for self-powered devices face limitations in performance improvement due to the trade-off relationship between different parameters. Here, a new kind of ion-modulation self-powered photodetector is first proposed and fabricated by depositing superionic conductor RbAg4I5 on one side of monolayer graphene. The graphene homojunction is successfully formed at the boundary of the asymmetric structure due to the formation of bound states of ions and electrons at the contact interface. This kind of homojunction avoids the trade off between response parameters of traditional self-powered devices because the dissociation of bound states under light irradiation dominates the generation of a photocurrent. The experimental results indicate that the prepared photodetector can achieve great photo response with responsivity of 20mA/W and a response speed of 700 mu s for ultraviolet and visible light when no bias is applied, which is better than most existing graphene-based self-powered devices in single or overall parameters. Further, a semi-quantitative model is systematically established according to the internal mechanism and realizes a good consistency with experimental results. The work provides a new idea and offers the foundation to develop excellent self-powered devices based on superionic materials with good properties in controllability and modulation.
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| GB/T 7714 | Wang, Pengfei , Huang, Duanhao , Liu, Hao et al. Enhanced self-powered ion- modulated photodetector based on an asymmetric composite structure of superionic conductor RbAg4I5 and graphene [J]. | OPTICS EXPRESS , 2022 , 30 (23) : 41644-41657 . |
| MLA | Wang, Pengfei et al. "Enhanced self-powered ion- modulated photodetector based on an asymmetric composite structure of superionic conductor RbAg4I5 and graphene" . | OPTICS EXPRESS 30 . 23 (2022) : 41644-41657 . |
| APA | Wang, Pengfei , Huang, Duanhao , Liu, Hao , Liu, Yu , Yin, Jun , Huang, Feng et al. Enhanced self-powered ion- modulated photodetector based on an asymmetric composite structure of superionic conductor RbAg4I5 and graphene . | OPTICS EXPRESS , 2022 , 30 (23) , 41644-41657 . |
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