Junyi Yang

Soochow University

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Yinglin Song

Soochow University

172

Xingzhi Wu

Suzhou University of Science and Technology

Zhongguo Li

Experimental Center of Tropical Forestry

Yu Fang

Suzhou University of Science and Technology

Xueru Zhang

Hefei University of Technology

Wenfa Zhou

Harbin Institute of Technology

Jian‐Ping Lang

Soochow University

Min Shui

China Academy of Engineering Physics

Yuxiao Wang

Northwest Normal University

Xiao Jin

Lingnan Normal University

Cooperative Institutions

Soochow University

Chinese Academy of Sciences

Harbin Institute of Technology

Suzhou University of Science and Technology

University of Chinese Academy of Sciences

Shanghai Jiao Tong University

Suzhou Research Institute

Northwestern Polytechnical University

Nanjing University

Tsinghua University

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Nonlinear absorption measurements using a lens imaging technique

Min Shui Xiao Jin Changwei Li Junyi Yang Yuxiao Wang

A new lens imaging technique based on geometrical optics imaging of lens for measuring nonlinear absorption coefficients of nonlinear materials is developed and demonstrated with ZnSe at 532 nm with picosecond (ps) laser pulse.

Picosecond

10.1109/cleopr.2009.5292114

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Reactivity Studies of Metal–Organic Frameworks under Vapor‐Assisted Aging: Structural Interconversions and Transformations

European Journal of Inorganic Chemistry (2016)

Panjuan Tang Chunmei Jia Yujie Jiang Wei Gong Xiaocong Cao

We systematically studied the chemical reactivities of 13 metal–organic frameworks (MOFs) under vapor‐assisted aging (VAG) at room temperature. The MOFs aged in solvent vapor at room temperature showed unexpectedly high reactivities for transformations into structures with other coordination networks. In addition, three MOFs reacted with 4,4′‐bipyridine to form three‐dimensional microporous MOFs under VAG conditions at room temperature.

Reactivity

10.1002/ejic.201600907

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Determination of nonlinear refraction in (TCBD)<inf>2</inf>OPV<inf>3</inf>/CH<inf>2</inf>Cl<inf>2</inf> solution by using the phase-object Z-scan technique

Junyi Yang Yinglin Song Changwei Li Xiao Jin Min Shui

Nonlinear refraction of an novel compound (TCBD) ₂ OPV ₃ /CH ₂ Cl ₂ solution is investigated by using an modified Z-scan technique. The experimental results show that nonlinear refraction of the sample is mainly due to transient thermal lensing effect.

10.1109/cleopr.2009.5292522

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Excited state refraction of C ₇₀ /toluene studied by using 4 f coherent imaging system with phase object

Chinese Physics B (2011)

N. Liu Guang Shi Junyi Yang Yinglin Song

Dynamic nonlinearities of C70/toluene solution are measured and analysed by an improved picosecond time-resolved pump-probe system based on a nonlinear imaging technique with phase object. The photophysical parameters are determined by the five-level model, which is adopted to interpret the experimental data. The change of refraction index per unit density of the excited state obtained by a numerically simulation is a critical factor to determine the nonlinear behaviour of C70 in picosecond time regime.

10.1088/1674-1056/20/1/013103

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Study of excited-state dynamics of D-π-A thiophene derivatives: Enhanced excited-state absorption and refraction

Journal of Photochemistry and Photobiology A Chemistry (2023)

Jie Li Jidong Jia Wenfa Zhou Xingzhi Wu Junyi Yang

Nanosecond

Vibrational energy relaxation

10.1016/j.jphotochem.2023.115395

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Measurement of nonlinear refraction using a reversal 4f coherent imaging system with phase objects

Optics Communications (2011)

Junyi Yang Yinglin Song Xueru Zhang Yuxiao Wang Changwei Li

10.1016/j.optcom.2011.05.071

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Ultrafast broadband carrier and exciton dynamics of Fe-related centers in GaN

Applied Physics Letters (2023)

Jianping Wang Fangyuan Shi Xingzhi Wu Junyi Yang Yongqiang Chen

The effect of Fe defects on carrier recombination and two-photon induced ultrafast exciton dynamics in GaN crystals were investigated using femtosecond transient absorption spectroscopy. The absorption kinetics exhibited completely different characteristics under different nonequilibrium carrier concentrations and distributions. The carrier recombination mechanisms under different excitation conditions can be interpreted by the model of Fe defect-related energy level. The absorption under one-photon excitation originates from the intraband transition of free holes, and the capture of holes by Fe2+ leads to the decay of the absorption. The ultrafast excitonic state [Fe2+,hVB] formation time under two-photon excitation results in a rapid absorption decay (<20 ps), while the long tail of the absorption response could be attributed to long-lived excitonic state (>100 ns). These findings are crucial to the applications of GaN for ultrafast optoelectronics and integrated nonlinear optics.

Photon energy

10.1063/5.0156570

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Citations (2)

CCDC 679378: Experimental Crystal Structure Determination

The Cambridge Structural Database (2009)

Zhi‐Gang Ren Junyi Yang Yinglin Song Ni-Ya Li Hong‐Xi Li

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccqsyfv

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Enhancement of ultrafast nonlinear absorption by different substituted positions in pyrene-containing twistacenes isomers

Optics & Laser Technology (2022)

Mengyi Wang Yanbing Han Xingzhi Wu Jidong Jia Wenfa Zhou

Chromophore

Two-Photon Absorption

10.1016/j.optlastec.2022.108563

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Ultrafast Dynamics of Optical Nonlinearities in β-Ga2O3

Frontiers in Materials (2021)

Yingfei Sun Yu Fang Zhongguo Li Junyi Yang Xingzhi Wu

We report the different nonlinear optical mechanisms and defect-related carrier dynamics in Sn-doped β-Ga 2 O 3 crystal by utilizing time-resolved pump-probe technique based on phase object under UV excitation. The obtained nonlinear optical parameters arise from bound electron can be well explained by the theoretical calculation of two-band model and Kramers-Kronig transformation. By tuning the probe wavelength, the carrier nonlinearity can be modulated greatly due to additional absorption of defects within the bandgap. The results reveal that by choosing a proper probe wavelength that matches the defect state to the valence band, the nonlinear absorption and refraction of the carriers can be greatly enhanced, which provides an important reference for the design of gallium oxide-based waveguide materials and all-optical switching materials in the future.

10.3389/fmats.2021.754842

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Citations (4)