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Terahertz spatial sampling with subwavelength accuracy

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Light(Science & Applications) 2019年第1期8卷 551-552页

作者： Yan Peng Yiming Zhu Min Gu songlin zhuang Terahertz Technology Innovation Research Institute Shanghai Key Lab of Modern Optical SystemTerahertz Science Cooperative Innovation CenterUniversity of Shanghai for Science and Technology200093 ShanghaiPeople’s Republic of China

A simple terahertz(THz)spatial sampling method offers kilohertz(kHz)level sampling rates and greatly preserves the energy of a THz pulse,which enables THz imaging detection with a high signal-to-noise ratio,micron-gra... 详细信息

关键词： pulse preserve enable

Terahertz Imaging and Spectroscopy in Cancer Diagnostics:A Technical Review

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Biomedical Engineering Frontiers 2020年第1期1卷 24-34页

作者： Yan Peng Chenjun Shi Xu Wu Yiming Zhu songlin zhuang Terahertz Technology Innovation Research Institute Shanghai Key Lab of Modern Optical SystemTerahertz Science Cooperative Innovation CenterUniversity of Shanghai for Science and TechnologyShanghai Institute of Intelligent Science and TechnologyTongji UniversityShanghaiChina

Terahertz(THz)waves are electromagnetic waves with frequency in the range from 0.1 to 10 *** waves have great potential in the biomedical field,especially in cancer diagnosis,because they exhibit low ionization energy and can be used to discern most biomolecules based on their spectral *** this paper,we review the recent progress in two applications of THz waves in cancer diagnosis:imaging and *** imaging is expected to help researchers and doctors attain a direct intuitive understanding of a cancerous *** spectroscopy is an efficient tool for component analysis of tissue samples to identify cancer ***,the advantages and disadvantages of the developed technologies for cancer diagnosis are ***,auxiliary techniques that have been used to enhance the spectral signal-to-noise ratio(SNR)are also reviewed.

关键词： diagnosis spectroscopy. cancer

Electrospun Bi-decorated Bi_(x)Ti_(y)O_(z)/TiO_(2) flexible carbon nanofibers and their applications on degradating of organic pollutants under solar radiation

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Journal of Materials Science & Technology 2023年第19期150卷 114-123页

作者： Liangtao Yao Changpo Sun Hui Lin Guisheng Li Zichao Lian Ruixin Song songlin zhuang Dawei Zhang Engineering Research Center of Optical Instrument and System Ministry of Education and Shanghai Key Lab of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Standards and Quality Center of National Food and Strategic Reserves Administration Beijing 100834China Department of Chemistry College of ScienceUniversity of Shanghai for Science and TechnologyShanghai 200093China

Presently,photocatalytic degradation has emerged as an attractive and efficient technology for wastewater *** order to avoid hurdles,such as difficulty in the suspended photocatalyst segregation from the aqueous system and low reutilization rate,the strategy of immobilizing photocatalysts with electro-spun fibers has been widely ***,those methods usually require multi-step preparation and complex *** this,a novel metallic Bi-decorated flexible multiphase Bi_(x)Ti_(y)O_(z)/TiO_(2) electrospun carbon nanofibers(Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs)with high photocatalytic efficiency,good mechanical property,good stability,easy separation,and recovery were synthesized via a one-step approach of pre-oxidation and carbonization *** as-prepared Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs with multiphase Bi_(x)Ti_(y)O_(z),anatase TiO_(2),and metallic Bi particles embedded not only enhance the harvest of light but also pro-vide more separation paths for photogenerated carriers,which improve photocatalytic efficiency *** Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs(S3)exhibited excellent photocatalytic performance and the degradation rate of 10 mg L^(-1) Rhodamine B(RhB)was up to 97%in only 30 min under simulated sunlight ***,S3 exhibited stable activity during 5 cycles of experiments since the degradation rates remained at about 97%in 30 *** mechanism of degradation of RhB by Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs in the photocat-alytic process was also proposed based on active species trapping *** work in this paper shows that Bi/Bi_(x)Ti_(y)O_(z)-TiO_(2)/CNFs are easy to prepare and have high photocatalytic ability and stability,thereby offering a new strategy in catalyst immobilization and wastewater treatment.

关键词： Electrospun nanofibers Photocatalyst Flexible

Location-dependent metamaterials in terahertz range for reconfiguration purposes

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Photonics Research 2016年第3期4卷 122-125页

作者： Ting Bu Kejian Chen Hong Liu Jianjun Liu Zhi Hong songlin zhuang Shanghai Key Lab of Modern Optical System Engineering Research Center of Optical Instrument and SystemMinistry of EducationUniversity of Shanghai for Science and Technology Centre for THz Research China Jiliang University

We propose and demonstrate a multifunctional location-dependent metamaterial in the terahertz(THz) range in which the unit cell consists of two pairs of coupled resonators. Experimental and simulation results of our devices reveal that both pairs of the coupled resonators will keep their individual resonance modes when they join together. Thus, the overall transmission spectrum is a combination of frequency response spectra of its corresponding constituent parts. While changing the locations of the inner resonators in our structure, controllable width of transmission window and changeable number of transmission dips can be realized. Our design provides a feasible structure for multifunctional microelectromechanical devices.

关键词： CSRR Location-dependent metamaterials in terahertz range for reconfiguration purposes SRRI

维普期刊数据库

Ghost imaging-based optical cryptosystem for multiple images using integral property of the Fourier transform

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Chinese Physics B 2021年第12期30卷 441-449页

作者： Yi Kang Leihong Zhang Hualong Ye Dawei Zhang songlin zhuang University of Shanghai for Science and Technology Shanghai 200093China

A novel ghost imaging-based optical cryptosystem for multiple images using the integral property of the Fourier transform is *** from other multiple-image encryption schemes,we mainly construct the modulation patterns related to the plaintext images to realize the encrypted transmission of multiple *** encryption process,the first image is encrypted by the ghost imaging encryption scheme,and the intensity sequence obtained by the bucket detector is used as the *** modulation patterns of other images are constructed by using the integral property of the Fourier transform and used as the ***,the ciphertext and keys are transmitted to the receiver to complete the encryption *** decryption,the receiver uses different keys to decrypt the ciphertext and gets different plaintext images,and decrypted images have no image aliasing *** and simulations verify the feasibility,security,and robustness of the proposed *** scheme has high scalability and broad application prospect,which provides a new idea for optical information encryption.

关键词： ghost imaging image encryption Fourier transform

维普期刊数据库

Small particle detection method based on laser feedback

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Frontiers of Optoelectronics 2008年第Z2期1卷 241-246页

作者： Guoqiang SUN Jihong ZHENG Gang ZHENG songlin zhuang College of Optics and Electron Information Engineering University of Shanghai for Science and Technology

In order to overcome the shortcomings of traditional particle measurement, a new method for the detection of small and single particles through laser feedback phenomenon is presented. This method is based on the laser feedback caused by radiation scattered back from a moving particle in the external cavity of the *** parameters of the single particle, such as the diameter,velocity, and quantity, can be measured and calculated from the change in output laser power. In the experiment,the confocal external cavity composed of a concave reflector and a positive lens is designed. This device is able to obtain the corresponding variety curve of standard particles passing through the confocal area, and then the parameters of the particles can be measured and calculated by combining the experimental data and standard curves. Experimental results show that this method is an easily operated and reliable way for particle *** measurement ranges from 0.2 to 2000 μm, resolution is 0.2 μm, and measurement error is within 2%. This device may have wide application in areas such as atmosphere particle detection and calibration of a single particle producer.

关键词： small particle detection laser feedback phenomenon confocal external cavity

Error reachable set based stabilization of switched linear systems with bounded peak disturbances

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Journal of Automation and Intelligence 2023年第2期2卷 87-98页

作者： Xinxin Shang songlin zhuang Tianyu Tan Yang Shi Department of Mechanical Engineering University of VictoriaVictoriaBCCanada Yongjiang Laboratory NingboChina

This paper investigates the error reachable set based stabilization problem for a class of discrete-time switched linear systems with bounded peak disturbances under persistent dwell-time(PDT)constraint.A double-clockdependent control scheme is presented that can split the disturbed switched system into a nominal system and an error system,and assign to each system a controller scheduled by a clock.A necessary and sufficient convex stability criterion is presented for the nominal system,and is further extended to the stabilization controller design with a nominal *** the presence of bounded peak disturbances,another stabilization controller with an error clock is developed for the error system,with the purpose of‘‘minimizing’’the reachable set of the error system by the ellipsoidal *** is demonstrated that the disturbed system is also globally exponentially stable in the sense of converging to an over approximation of the reachable set of the error system,i.e.,a union of a family of bounding ellipsoids,that can also be regarded as the cross section of a tube containing the trajectories of the disturbed *** numerical examples are provided to verify the effectiveness of the developed results.

关键词： Bounded peak disturbances Persistent dwell-time Reachable set minimization Stability and stabilization Switched systems

Experimental generation and observation of a super-resolution optical tube

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Journal of Innovative Optical Health Sciences 2016年第3期9卷 79-82页

作者： Jianghua Xu Liping Jiang Houfei Zhu Lingling Liu Jinbing Hu Haifeng Wang songlin zhuang Institute of Imaging Optics Ministry of Education and Shanghai Key Lab of Modern Optical Systems University of Shanghai for Science and Technology Shanghai 200093P.R.China

We generated a super-resolution optical tube by tightly focusing a binary phase modulated azimuthally polarized laser *** binary phase modulation is achieved by a glass substrate with multi-belt concentric ring *** also characterized the 3D beam pro¯le by using a crossshaped knife-edge fabricated on a silicon *** size of the super-resolution dark spot in the tube is 0.32,which remains unchanged for4within the *** optical tube may¯nd applications in super-resolution microscopy,optical trapping and particle acceleration.

关键词： Laser beam shaping photodetectors binary optics fluorescence microscopy polarization.

Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering

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Light(Science & Applications) 2017年第1期6卷 490-496页

作者： Fuxing Gu Fuming Xie Xing Lin Shuangyi Linghu Wei Fang Heping Zeng Limin Tong songlin zhuang Shanghai Key Laboratory of Modern Optical Systems Engineering Research Center of Optical Instrument and System(Ministry of Education)University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China

Single-mode lasing in whispering-gallery mode(WGM)microresonators is challenging to *** bottle microresonators,the highly non-degenerated WGMs are spatially well-separated along the long-axis direction and provide mode-selection *** this work,by engineering the pump intensity to modify the spatial gain profiles of bottle microresonators,we demonstrate a simple and general approach to realizing single-mode WGM lasing in polymer bottle *** pump intensity is engineered into an interference distribution on the bottle microresonator *** tuning the spacing between axial positions of the interference pump patterns,the mode intensity profiles of single-bottle WGMs can be spatially overlapped with the interference stripes,intrinsically enabling single-mode lasing and *** advantages of the system,including high sidemode suppression factors 420 dB,large spectral tunability 48 nm,low-lasing threshold and reversible control,are *** demonstrated approach may have a variety of promising applications,ranging from tunable single-mode lasing and sensing to nonlinear optics.

关键词： bottle microresonators polymer single-mode lasing spatial pump engineering whispering-gallery modes