Two-Photon

Two-photon absorption towards pulse modulation in mechanically exfoliated and CVD monolayer cascaded... Mechanical exfoliation (ME) and chemical vapor deposition (CVD) MoS

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Two-photon direct laser writing of ultracompact multi-lens objectives 光电信息领域最近进展成果，激光双光子，多镜头物空间

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Design and synthesis of pyrimidine based two-photon fluorescence probe and its application in ... Design and synthesis of pyrimidine based two-photon fluorescence probe and its application in bioimaging (封面文章)

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Concentration dependence of two-photon absorption and subsequent excited-state absorption in acetone... 研究4-甲氧基-2-硝基苯胺/丙酮溶液中浓度依赖的两光子吸收和其后的激发态吸收，顾兵，Wei Ji，应用近红外飞秒脉冲激光激发下的Z-扫描和瞬态吸收测量实验，研究了4-甲氧基-2-硝基苯胺（4M2N）/丙酮溶液中浓度依赖的两...

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Applying a mixed light field generated from a two-level atomic ensemble to two-photon interference A mixed light field generated from a two-level atomic ensemble can be used for two-photon interference. In this mixed light field, correlated paired photons generated from a four-wave mixing process ...

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Two-photon imaging of lymphoma cells targeted by gold nanoparticles Gold nanoparticles (NPs) have highly efficient multi-photon-induced luminescence. In this paper, we record the two-photon images of gold NPs, lymphoma cell line Karpas 299, and Karpas 299 incubated ...

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Investigation of transient two-photon excited fluorescence in biological tissue A more reliable analysis is developed based on transient two-photon absorption because the response time of two-photon absorption is longer than the width of a femtosecond pulse. Good agreement is ...

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Nondegenerate four-wave mixing participated by two-photon excited stimulated emission Two-photon excited stimulated emission at ~617 nm has been achieved in an organic chromophore solution pumped at 1064 nm. The stimulated emission can be observed only in the forward and backward ...

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Design of two-photon photochromic diarylethenes and application in 3D data storage A series of diarylethene derivatives with two-photon absorption was designed and synthesized. The nonlinear properties of two-photon induced fluorescence of the compounds were examined. A strategy for...

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Synthesis and two-photon induced fluorescence spectroscopy of a novel nonlinear optical chromophore A novel organic chromophore (A1) is designed and synthesized with a fine structure for two-photon absorption (TPA). The single-photon induced fluorescence spectra and the fluorescence lifetime have ...

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Photoelectron angular distributions from two-photon ionization of atoms near ionization threshold Photoelectron angular distributions (PADs) from two-photon ionization of atoms in linearly polarized strong laser fields are obtained in accordance with the nonperturbative quantum scattering theory....

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Preparation of two-photon fluorescent probe and biological imaging application in cells We report on a novel dibenzothiophene-based two-photon fluorescent probe for selective nuclear bioimaging, which contains bilaterally symmetrical pyridine rings connected by a central conjugated-...

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Theoretical analysis on two-photon absorption spectroscopy in a confined four-level atomic system We investigate theoretically two-photon absorption spectroscopy modified by a control field in a confined Y-type four-level system. Dicke-narrowing effect occurs both in two-photon absorption lines ...

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Femtosecond fiber laser at 780 nm for two-photon autofluorescence imaging We present an Er-doped fiber (Er:fiber)-based femtosecond laser at 780?nm with 256?MHz repetition rate, 191?fs pulse duration, and over 1?W average power. Apart from the careful third-order dispersion...

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Multidither coherent optical adaptive technique for deep tissue two-photon microscopy Two-photon microscopy normally suffers from the scattering of the tissue in biological imaging. Multidither coherent optical adaptive technique (COAT) can correct the scattered wavefront in parallel. ...

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Three-dimensional photonic crystals containing designed defects achieved with two-photon ... Two-photon photopolymerization (TPP) with femtosecond laser is a promising method to fabricate three-dimensional (3D) photonic crystals (PCs). Based on the TPP principle, the micro-fabrication system ...

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Two-photon induced optical-power limiting in N-vinylcarbazole tricarbonyl chromium The large two-photon absorption (TPA) coefficient and nonlinear refraction index are measured by an open-aperture Z-scan technique and closed-aperture Z-scan technique, respectively. The sample ...

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Label-free imaging immune cells and collagen in atherosclerosis with two-photon and second harmonic ... Atherosclerosis has been recognized as a chronic inflammation disease, in which many types of cells participate in this process, including lymphocytes, macrophages, dendritic cells (DCs), mast cells, ...

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Efficient two-photon sensitized luminescence of europium (III) complex based on hypersensitive ... The luminescence of transition 5D0->7F2 (612 nm) is induced by two-photon absorption of hypersensitive transitions 7F0->5D2 (465 nm) and 7F1->5D1 (535 nm). Analysis results suggest that the two-...

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Electrochemical, thermal, and photophysical properties of novel two-photon absorption chromophores Electrochemical, thermal, and photophysical properties of novel... Excitation at 400 nm reveals emission peaks at 483-487 nm and the fluorescence quantum yields are 0.73-0.75 in CH2Cl2 Two-photon absorpt

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Neural-network-assisted femtosecond laser pulse duration measurement using two-photon absorption Experimentally, the interferometric autocorrelation trace is observed clearly with the use of the two-photon absorption (TPA) effect in a GaAs photodiode. The intensity autocorrelation function is ...

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Recent advances in two-photon imaging: technology developments and biomedical applications In the past two decades, two-photon microscopy (TPM) transforms biomedical research, allowing nondestructive high-resolution fluorescent molecular imaging and label-free imaging in vivo and in real ...

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OBSERVING NEURONAL ACTIVITIES WITH RANDOM ACCESS TWO-PHOTON MICROSCOPE As a second messenger in signal transduction, calcium ion plays a very important role in neuronal information processing and integrating. Limited by the imaging technique, it is difficult to ...

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Two-photon excited spectroscopies of ex vivo human skin endogenous species irradiated by femtosecond... Two-photon excited spectroscopies from ex vivo human skin are investigated by using a femtosecond laser and a confocal microscope (Zeiss LSM 510 META). In the dermis, collagen is responsible for ...

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Quantitative deviation of the two-photon absorption coefficient based on three laser pulse models The pulse profile influence of excitation light on the two-photon absorption coefficient \beta is theoretically and numerically studied. Based on Gaussian spatial and temporal laser, we obtain an ...

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Investigation of nondegenerate two-photon absorption in common fluorescent dyes Investigation of nondegenerate two-photon absorption in common fluorescent dyes

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Nonlinear two-photon absorption properties induced by femtosecond laser with the f ilms of two novel... Two novel anthracene derivatives containing 4-vinylpyridine (FPEA) and 2-vinylpyridine (TPEA) poly(methyl methacrylate) films are ... These two-photon absorption (TPA) properties are proven by the two-p

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Intravital imaging of adriamycin-induced renal pathology using two-photon microscopy and optical ... In our studies, we evaluated renal changes in a rat model after Adriamycin injection using two-photon microscopy (TPM), optical coherence tomography (OCT) and Doppler OCT (DOCT). Taking advantage of ...

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Coherent control of two-photon absorption of Pr3+ ion by shaped ultrashort laser pulses In this letter, the two-photon absorption (TPA) probability in a Pr3+ ion system is enhanced by a factor of 12.3 by a \pi-phase step scanning of ultrashort laser pulses. This level is significantly ...

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Rules of Two-Photon Concerted Photochemical Pericyclic Reactions and Its Difference from Woodward-... 双光子协同光化学周环反应规则及其与单光子周环反应的Woodward-Hoffman规则的区别，张先付，，从理论和实验方面比较了双光子（频率v）和相应的单光子（频率2v）反应，二者常得到不同的产物，表明Woodward-Hoffman ...

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Background-Free Optical Sampling System Using Si Avalanche Photodiode as Two-Photon Absorber The introduction of a double-chopping scheme eliminates the background level in the optical sampling system, where a Si avalanche photodiode acts as a two-photon absorber. We successfully demonstrate ...

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Two-photon absorption of monolayer graphene suspensions in femtosecond regime Nonlinear absorption of monolayer graphene suspension is studied in the wavelength of 800 nm using Z-scan method with 50-fs pulses. Nonlinear absorption property of graphene suspension at different ...

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Observation of enhanced two-photon absorption in ZnS quantum dots at an ultraviolet wavelength Two-photon absorption (2PA) in zinc sulphide (ZnS) and Mn2+-doped ZnS quantum dots is reported by the z-scan technique, with nanosecond pulsed laser radiation at 355 nm. The observed values of the 2PA...

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Two-photon interference with photons of different colors 利用两个不同颜色的光子实现双光子干涉，刘建彬，陈辉，我们利用费曼路径积分研究了两个不同颜色的光子在Hong-Ou-Mandel干涉仪中的二阶干涉。如果探测系统从原理上不能分辨这两个不同颜色的�

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MULTIPHOTON MICROSCOPIC IMAGING OF MOUSE INTESTINAL MUCOSA BASED ON TWO-PHOTON EXCITED FLUORESCENCE ... Multiphoton microscopy (MPM), based on two-photon excited fluorescence and second harmonic generation, enables direct noninvasive visualization of tissue architecture and cell morphology in live ...

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Two-photon spectra of organic salt trans-4- [p-(N-hydroxyethyl-N-methylamino)styryl]-N- ... Two-photon absorption (TPA) cross sections of an organic dye, trans-4-[p-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium iodide (abbreviated as ASPI), from 810 to 1100 nm have been measured ...

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Dispersion dependence of two-photon absorption transition on frequency in Si PIN photodetector Dispersion dependence of two-photon absorption transition on frequency in Si PIN photodetector

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Two-photon oxygen nanosensors based on a conjugated fluorescent polymer doped with platinum ... Two-photon oxygen nanosensors based on a conjugated fluorescent polymer doped with platinum porphyrins

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Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots，LIU Shuyu，ZHONG Mianzeng，We report on large two-photon absorption (TPA) in ZnO/ZnS and ZnO/ZnS/Ag core/shell quantum dots ...

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Two-photon-excited upconversion luminescence of Mn2+-doped germanate glass by infrared femtosecond ... Two-photon-excited upconversion luminescence of Mn2+-doped germanate glass by infrared femtosecond laser irradiation

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Incoherently coupled spatial soliton families in biased two-photon photorefractive crystals with ... Here we present the evolution equations of one-dimension incoherently coupled spatial soliton families due to two-photon effect in biased photorefractive crystals with both the linear and quadratic ...

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Novel photoinitiator with a radical quenching moiety for confining radical diffusion in two-photon ... Novel photoinitiator with a radical quenching moiety for confining radical diffusion in two-photon induced photopolymerization

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The effect of Doppler broadening on dispersive and absorptive properties in atomic systems with two-... The effect of Doppler broadening on dispersive and absorptive properties in atomic systems with two-photon interference

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PROBING THE IMPACT OF GAMMA-IRRADIATION ...WAVELENGTH INTRINSIC SIGNAL TWO-PHOTON EXCITED FLUORESCENCE Two-photon excited fluorescence (TPEF) spectroscopy and imaging were used to investigate the effects of gamma-irradiation on neural stem and precursor cells (NSPCs). While the observed signal from ...

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Changing two-photon correlation into anticorrelation by superposing thermal and laser light 利用热光和激光将双光子关联转变为反关联，刘建彬，周宇，利用具有相同偏振和频谱分布的热光和激光干涉，可以将双光子关联变成双光子反关联，这个现象可以用双光子干涉理论来解释。利用赝

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Bright Fluorescent Probe Based on Plasmonic Enhanced Two-Photon Fluorescence with Gold Nanoshells 等离基元金纳米球壳结构作为双光子荧光探针的研究，张天悦，吕国伟，本文提出利用单个金纳米球壳结构作为有效的双光子荧光探针.文中系统的研究了具有多个局域表面等离激元的金纳米球壳颗粒,能够极大�

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matlab由频域变时域的代码-two-photon-toolbox:用于分析体内2光子数据的基本工具箱。当我与苍蝇一起工作时... matlab由频域变时域的代码2光子成像分析工具箱 罗伯·坎贝尔（Rob Campbell）-冷泉港 在开始之前，请先阅读此文件。 ... 注意[20/04/2015] 该工具箱不再处于活动开发中。 它适用于相对较小的数据大小，其中每个试验占用...

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Topics in Fluorescence Spectroscopy, Vol 5, Nonlinear and Two-Photon Induced Fluorescence Topics in Fluorescence Spectroscopy, Vol 5, Nonlinear and Two-Photon Induced Fluorescence

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Two- and three-photon absorption in a novel fluorene-based compound based compound 2,7-bis (4-methoxystyryl)-9, 9-bis (2-ethylhexyl)-9H-fluorene (abbreviated as BMOSF) was synthesized and its nonlinear absorption was investigated using two different laser systems:...

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Hollow Gaussian beam generated by beam shaping with phase-only liquid crystal spatial light ... Based on the refractive beam shaping system, the transformation of a quasi-Gaussian beam into a dark hollow Gaussian beam by a phase-only liquid crystal spatial light modulator (LC-SLM) is proposed....

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