A5035758623- Nonlinear Optical Materials Studies
- Nonlinear Optical Materials Research
- Porphyrin and Phthalocyanine Chemistry
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Luminescence and Fluorescent Materials
- Plasmonic and Surface Plasmon Research
- GaN-based semiconductor devices and materials
- Photochemistry and Electron Transfer Studies
- Semiconductor materials and devices
- Optical Coatings and Gratings
- ZnO doping and properties
- Metamaterials and Metasurfaces Applications
- Optical Systems and Laser Technology
- Ga2O3 and related materials
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Photochromic and Fluorescence Chemistry
- Diamond and Carbon-based Materials Research
- Photonic and Optical Devices
- Liquid Crystal Research Advancements
- Phase-change materials and chalcogenides
- Quantum optics and atomic interactions
- Electrokinetic Soil Remediation Techniques
Suzhou University of Science and Technology
2018-2025
Harbin Institute of Technology
2014-2023
Capital Medical University
2023
Beijing Tongren Hospital
2023
Hubei University of Chinese Medicine
2023
Hubei Provincial Hospital of Traditional Chinese Medicine
2023
Soochow University
2011-2022
Changshu Institute of Technology
2017-2022
Shandong University
2022
Jiangxi University of Traditional Chinese Medicine
2021
Pyrene is considered as one of the most promising nonlinear functional building blocks.
Ultra-broadband reversed saturable absorption (RSA) is achieved in a spindle-type compound containing twistacene. This capability verified by experiments and found to be applicable for various laser pulses from femtoseconds nanoseconds. With mechanism interpreted validated theoretical model, this finding provides new perspective synthesizing novel broadband optical limiting material. As service our authors readers, journal supporting information supplied the authors. Such materials are peer...
Currently, the limitations of conventional methods for fabricating metamaterials composed well-aligned nanoscale inclusions either lack necessary freedom to tune structural geometry or are difficult large-area synthesis. In this Communication, authors propose a fabrication route create well-ordered silver nano forest/ceramic composite single-layer multi-layer vertically stacked structures, as distinctive approach make metamaterials. To take advantage direct growth, fabricate nanocomposite...
Two kinds of D-A molecular (4-(4-(9H-carbazol-9-yl)phenyl))-7-nitrobenzothiadiazole (BSC) and 4-((4-(9H-carbazol-9-yl)phenyl)ethynyl)-7-nitrobenzothiadiazole (BEC) containing carbazole moieties as the donor were synthesized. X-ray crystal data elucidated multiple intermolecular interactions. They exhibit distinctly different self-assembly behaviours. The nonlinear optical properties studied using top-hat Z-scan technique at 532 nm with a 21 ps pulse. results indicate that they large...
Intramolecular charge transfer (ICT) is an important factor in the nonlinear optical (NLO) properties of organic molecules. In order to study effect ICT on two-photon absorption (TPA) and excited-state (ESA), three chalcone derivatives (1, 2 3) with different electron push-pull systems were designed synthesized. The performance these depends mainly includes ultrafast femtosecond time domain long-lived state (CTS) picosecond domain, which dominate molecular TPA ESA respectively. Hole-electron...
Abstract In this study, using only a single pulse, pump-probe measurement with large time window of more than 100 ps is implemented. A commercial grating used to encode ∼56 in pulse; therefore, there no need for machining customization. addition, technique, the surface accurately imaged, eliminating image blur problem caused by phase differences previous echelon-based techniques. Moreover, make full use and obtain larger window, simple reflection echelon combined that matches window. This...
The nonlinear optical properties of fused-ring electron acceptors are enhanced by extending their conjugation length. And IEICO-4F with a narrow bandgap exhibits remarkable laser protection performance in the near-infrared region.
Large enhancement of nonlinear absorption and refraction are achieved simultaneously in highly ordered two dimensional (2D) covalent organic framework (COF) films prepared by solidliquid interface one-step method to overcome the weakness COF powders solubility. In intrinsic optical response obtained at 532 nm with 5 ns pulse, coefficients (β) -4.87 × 10-5 -1.29 m W-1, respectively. Simultaneously, fitted closed-aperture curves also show large refractive indexes (n2), -5.62 10-12 m2 W-1 -0.76...
Abstract In this research, we studied the ultrafast dynamics and phase transition of VO2 films with different thicknesses. Using transient absorption spectroscopy, two thicknesses 59.5 148 nm showed broadband excited state from 450–750 nm, maximum peak was at ~450 nm. Under low excitation fluences, exhibit three sequential dynamic processes time scales femtoseconds (fs) to nanoseconds (ns). Depending on film thickness fluence, a is observed in scale ~21 ps when fluence reaches 1.27 mJ/cm2....
Fully understanding and modulating the nonlinear absorption in GaN are crucial for designing ultrafast photonic devices. In this work, both ultra-broadband transient spectra carrier recombination time were found to be significantly altered by carbon defects. An energy band model defect dynamics was established based on photoluminescence spectroscopy. Our discernibly reveals that CN tri-carbon intricately modulate spectrum capture process: The rapid of holes reduces hole hundreds femtoseconds...
Abstract Construction of novel arenes bearing promising optical limiting characteristics in the near‐infrared region is high demand but limited. Herein, two helicene‐embedded 4 and 6 have been strategically synthesized characterized. Under 190 fs pulse width, both them exhibit broadband reverse saturable absorption over a range from 750 to 800 nm, 900 1030 1200 then 1250 nm. The thresholds are determined be 8.1 mJ cm −2 for , 6.2 at 26.4 20.8 respectively. In addition, compounds display...
Two simple hydrazone derivatives (A1 and A2) linked with different Π-conjugated systems are designed synthesized to reach ultrafast broad-band optical limiting (OL) under pulse widths. To exploit various virtues of two-photon absorption (TPA)-induced excited-state (TPA–ESA), ESA is successfully established on a singlet state. Both compounds show range from 556 750 nm relatively long lifetime. A1 displays larger reverse saturable than A2 in the multiwavelength Z-scan experiments. Furthermore,...
The nonlinear absorption properties and excited-state dynamics of two linear D−π–A pyrene derivatives (B1 B2) with different push–pull were investigated compared. transient spectra provide information about their excited states, revealing a transition from the local (LE) state to charge transfer (CT) in each compounds. Z-scan measurements show that both exhibit reverse saturable at multiple excitation widths (fs, ps, ns). Combined quantum chemical calculations, experimental results indicate...
We present a metasurface consisting of W-shaped resonators to realize broadband reflective linear and circular polarization conversions. find that the cross conversion ratio for normal incidence is over 0.95 from 9.2 18.7 GHz, covering 68.1% central frequency. also show that, performance almost insensitive angle incident waves. Furthermore, by simply adjusting geometrical parameters metasurface, achieved. emphasize bandwidth axis less than 3.0 dB covers 10.1 17.7 equivalent 54.7% relative...
We reported a systematic investigation on the three-photon absorption (3PA) spectra and wavelength dispersion of Kerr refraction bulk m-plane GaN crystal with both polarization E⊥c E//c by femtosecond Z-scan technique in near-infrared region from 760 to 1030 nm. Both 3PA were good agreement two-band models. The calculated nonlinear figure merit measured ultrafast dynamics via pump-probe phase object method revealed that would be promising candidate for all-optical switching autocorrelation...
We reported a systematic study about the anisotropic optical nonlinearities in bulk m-plane and a-plane GaN crystals by Z-scan pump-probe with phase object methods under picosecond at 532 nm. The two-photon absorption coefficient, which was measured as function of polarization angle, exhibited oscillation curves period π/2, indicating highly polarized third-order nonlinearity both nonpolar samples. Furthermore, free-carrier revealed stronger hole-related for E⊥c than E//c probe polarization....