Article
Optics
Tobias Pfeiffer, Jens Klier, Georg von Freymann, Daniel Molter
Summary: Nonlinear frequency conversion provides an elegant method for detecting low-energy photons with different wavelengths from the pump wavelength while providing phase information. We propose a phase-sensitive measurement method in the terahertz spectral range using visible light, which enables fast determination of layer thicknesses and achieves phase-resolved detection of terahertz pulses with standard equipment.
Article
Chemistry, Multidisciplinary
Fang Wang, Zhen Li, Xiaobo Zhang, Rengan Luo, Hanlin Hou, Jianping Lei
Summary: A transformable upconversion MOF with a UCNP core and an azobenzene-based MOF shell is developed for NIR light-modulated chemotherapy. The dual Forster resonance energy transfers in this system trigger MOF transformation for drug release and prodrug activation, significantly inhibiting tumor growth and metastasis.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Youxin Fu, Kefan Wu, Georgios Alachouzos, Nadja A. Simeth, Thomas Freese, Michal Falkowski, Wiktor Szymanski, Hong Zhang, Ben L. Feringa
Summary: Photoclick reactions combine the selectivity of classical click chemistry with the precision and control of light. A reliable and versatile strategy using near infrared light and upconversion nanoparticles was introduced to activate the reactions. Successful in vivo applications were demonstrated through tissue penetration.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hui Yu, Wanlu Sun, Aliya Tiemuer, Yuanyuan Zhang, Hai-Yan Wang, Yi Liu
Summary: The mitochondria-targeted near-infrared probe (NRh-O) shows rapid response under hypoxic conditions to release the FUCL product NRh with high sensitivity and selectivity in mitochondria. This indicates the potential application of a hypoxia-responsive probe in early clinical diagnosis.
CHEMICAL COMMUNICATIONS
(2021)
Article
Astronomy & Astrophysics
P. A. Krachkov, R. N. Lee, A. I. Milstein
Summary: This study focuses on the electron-positron pair production by a photon in Coulomb field near the threshold. The analytical results for the energy spectrum and angular distribution of particles are obtained using the parameter Ze(2)/h over line v. It is demonstrated that the Furry-Sommerfeld-Maue approximation used in the previous study leads to incorrect results.
Review
Physics, Multidisciplinary
Xingyuan Guo, Zhe Wang, Shengyan Yin, Weiping Qin
Summary: As the global energy crisis and environmental pollution problems worsen, it is crucial to develop new methods for energy capture and pollution management. Photocatalysis has gained significant interest for its potential application in utilizing solar energy to degrade organic pollutants.
Article
Chemistry, Multidisciplinary
Yongchun Pan, Xiaowei Luan, Yanfeng Gao, Fei Zeng, Xuyuan Wang, Dongtao Zhou, Wanqi Li, Yuzhen Wang, Bangshun He, Yujun Song
Summary: Researchers have designed a cancer-activated nanomachine based on porous upconversion nanoparticles for precise phototherapy. The nanosystem contains a telomerase substrate primer and encapsulates 5-aminolevulinic acid and D-arginine. After coating with hyaluronic acid, the nanomachine can easily enter tumor cells and induce efficient accumulation of protoporphyrin IX via biosynthetic pathway. The nanomachine can respond to near-infrared light and generate active singlet oxygen through Förster resonance energy transfer. Moreover, it can relieve tumor hypoxia by converting D-arginine into nitric oxide, thereby improving the phototherapy effect.
Article
Optics
Xin-ke Wang, Jia-sheng Ye, Wen-feng Sun, Peng Han, Lei Hou, Yan Zhang
Summary: A technique based on air-plasma dynamic aperture was developed to achieve THz imaging with quasi sub-wavelength resolution, without the need to approach the sample with any devices and avoiding damage to the sample. This technique has the potential to accelerate the advancement of THz microscopy by enabling near-field imaging of different materials.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Yuehong Zhang, Xiaohui Zhu, Jing Zhang, Yihan Wu, Jinliang Liu, Yong Zhang
Summary: Lanthanide-doped upconversion nanoparticles (UCNPs) have unique capabilities of converting near-infrared light to visible/ultraviolet emission. A study reported Nd3+-sensitized UCNPs with high concentration of Nd3+ doping (up to 50 mol%), which significantly increased the upconversion emissions upon 808 nm excitation for dual photodynamic and photothermal therapy. This novel nanoplatform can solve overheating issue associated with 980 nm light excitation and significantly improve cancer therapy efficacy through synergistic therapeutic effect.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Optics
Miguel Lopez-Ripa, Inigo J. Sola, Benjamin Alonso
Summary: We demonstrate the capability of the amplitude swing technique to measure ultrashort laser pulses in different spectral regions. The technique can be applied without significant modifications and a new retrieval strategy using a differential evolution algorithm is implemented.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Applied
Xueqi Bai, Peng Bai, Xiaohong Li, Siheng Huang, Xinran Lian, Wenjun Song, Zhiwen Shi, Wenzhong Shen, Yueheng Zhang
Summary: This study introduces two types of QWPs based on antenna-coupled microcavity structures, improving coupling efficiency and achieving high-performance multi-color THz detection.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Zhongbo Yang, Dongyun Tang, Jiao Hu, Mingjie Tang, Mingkun Zhang, Hong-Liang Cui, Lihua Wang, Chao Chang, Chunhai Fan, Jiang Li, Huabin Wang
Summary: A graphene-mediated THz scattering-type scanning near-field optical microscope is developed for direct imaging of single proteins, demonstrating that a graphene substrate with high THz reflectivity and atomic flatness provides high THz contrast against protein molecules. The use of an optimized length platinum probe enhances the amplitude of scattered THz near-field signals, allowing the topographical and THz scattering images of individual IgG and ferritin molecules with a few nanometers in size to be obtained simultaneously. This strategy opens up new avenues for imaging single biomolecules with THz.
Article
Chemistry, Analytical
Caiping Ding, Yuting Gu, Weiwei Chen, Long Chen, Longhua Guo, Youju Huang
Summary: Near-infrared (NIR) fluorescent probes offer highly sensitive detection of Al3+ for human health purposes. This study introduces new Al3+ response molecules (HCMPA) and NIR upconversion fluorescent nanocarriers (UCNPs) that respond to Al3+ through ratio NIR fluorescence. The use of UCNPs improves photobleaching and addresses the lack of visible light in specific HCMPA probes. The NIR ratiometric fluorescence sensing system successfully detects Al3+ within the range of 0.1-1000 nM with an accuracy limit of 0.06 nM.
ANALYTICA CHIMICA ACTA
(2023)
Review
Materials Science, Multidisciplinary
Tianyu Rao, Menglu Chen, Ge Mu, Xin Tang
Summary: This paper summarizes the recent advances and progress of infrared-to-visible upconversion devices, and presents the main limitations of upconversion technology and the challenges that need to be addressed for the future development of infrared upconverters.
Article
Nanoscience & Nanotechnology
Jiaojian Shi, Daehan Yoo, Ferran Vidal-Codina, Chan-Wook Baik, Kyung-Sang Cho, Ngoc-Cuong Nguyen, Hendrik Utzat, Jinchi Han, Aaron M. Lindenberg, Vladimir Bulovic, Moungi G. Bawendi, Jaime Peraire, Sang-Hyun Oh, Keith A. Nelson
Summary: Researchers have developed a room-temperature terahertz camera and polarimeter based on a quantum-dot-enhanced THz-to-visible upconversion mechanism. The camera offers broadband and fast responses and can detect THz pulses with peak fields as low as 10 kV cm(-1).
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Applied
M. J. Cliffe, D. M. Graham, S. P. Jamison
APPLIED PHYSICS LETTERS
(2016)
Article
Instruments & Instrumentation
R. Pan, S. P. Jamison, T. Lefevre, W. A. Gillespie
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2016)
Article
Physics, Fluids & Plasmas
Y. Wei, S. Jamison, G. Xia, K. Hanahoe, Y. Li, J. D. A. Smith, C. P. Welsch
PHYSICS OF PLASMAS
(2017)
Article
Multidisciplinary Sciences
D. A. Walsh, D. S. Lake, E. W. Snedden, M. J. Cliffe, D. M. Graham, S. P. Jamison
NATURE COMMUNICATIONS
(2017)
Article
Instruments & Instrumentation
A. L. Healy, G. Burt, S. P. Jamison
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2018)
Article
Instruments & Instrumentation
Y. Wei, R. Ischebeck, M. Dehler, E. Ferrari, N. Hiller, S. Jamison, G. Xia, K. Hanahoe, Y. Li, J. D. A. Smith, C. P. Welsch
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2018)
Article
Engineering, Electrical & Electronic
Liang Zhang, Wenlong He, Steven Jamison, Colin G. Whyte, Kevin Ronald, Alan D. R. Phelps, Adrian W. Cross
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2019)
Article
Physics, Applied
M. T. Hibberd, D. S. Lake, N. A. B. Johansson, T. Thomson, S. P. Jamison, D. M. Graham
APPLIED PHYSICS LETTERS
(2019)
Article
Optics
Morgan T. Hibberd, Alisa L. Healy, Daniel S. Lake, Vasileios Georgiadis, Elliott J. H. Smith, Oliver J. Finlay, Thomas H. Pacey, James K. Jones, Yuri Saveliev, David A. Walsh, Edward W. Snedden, Robert B. Appleby, Graeme Burt, Darren M. Graham, Steven P. Jamison
Article
Physics, Applied
V. Georgiadis, A. L. Healy, M. T. Hibberd, G. Burt, S. P. Jamison, D. M. Graham
Summary: The study developed dielectric-lined rectangular waveguide structures for ultrafast deflection of 100 keV electron beams driven by terahertz (THz) waves, achieving phase velocity matching with co-propagating electron bunches. The experimental confirmation of phase-matching capability was conducted through time-frequency analysis of broadband coherent THz transmission. The study also determined frequency-dependent propagation constants in the electron interaction region and propagation characteristics of the integrated THz tapered coupler.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Fluids & Plasmas
O. J. Finlay, J. N. Gruse, C. Thornton, R. Allott, C. D. Armstrong, C. D. Baird, N. Bourgeois, C. Brenner, S. Cipiccia, J. M. Cole, C. Gregory, S. Jamison, Y. Katzir, N. C. Lopes, S. P. D. Mangles, C. D. Murphy, Z. Najmudin, D. Neely, L. R. Pickard, K. D. Potter, P. P. Rajeev, D. Rusby, M. P. Selwood, D. R. Symes, C. I. D. Underwood, J. C. Wood, A. G. R. Thomas, M. J. Streeter
Summary: The study reports the characterisation of an x-ray source generated by a laser-driven plasma wakefield accelerator, demonstrating an optimized spectrum consistent with on-axis synchrotron spectrum and a calculated number of photons per pulse above 1 keV. The x-ray beam was used to image a resolution grid, with observed effects of laser damage on the gas cell leading to changes in the accelerated electron beam charge and x-ray flux.
PLASMA PHYSICS AND CONTROLLED FUSION
(2021)
Article
Physics, Nuclear
Oznur Apsimon, Graeme Burt, Robert B. Appleby, Robert J. Apsimon, Darren M. Graham, Steven P. Jamison
Summary: The study investigates staged acceleration driven by terahertz frequency radiation pulses in a lattice with alternating orientation dielectric-lined waveguides and intervening matching optics, showing a significant reduction in transverse emittance and energy spread growth. The decomposition of the longitudinal THz field reveals a quadrupole field component with radial dependence, inducing transverse energy correlation in the beam. Additionally, an alternating orientation of stages separated by a matching section compensates for transverse energy spread correlation induced in the beam during its interaction with the THz field, while also preventing emittance growth with constant monopolar transverse voltage in the accelerating LSM11 mode.
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
M. T. Hibberd, D. S. Lake, N. A. B. Johansson, T. Thomson, S. P. Jamison, D. M. Graham
2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
V. Georgiadis, A. Healy, M. T. Hibberd, G. Burt, S. P. Jamison, D. M. Graham
2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
A. L. Healy, G. Burt, S. P. Jamison
2017 10TH UK-EUROPE-CHINA WORKSHOP ON MILLIMETRE WAVES AND TERAHERTZ TECHNOLOGIES (UCMMT)
(2017)
