A5044046067- Photorefractive and Nonlinear Optics
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Ferroelectric and Piezoelectric Materials
- Optical and Acousto-Optic Technologies
- Crystal Structures and Properties
- Luminescence Properties of Advanced Materials
- Electrochemical Analysis and Applications
- Advanced Optical Imaging Technologies
- Electrochemical sensors and biosensors
- Solid-state spectroscopy and crystallography
- Molecular Junctions and Nanostructures
- Semiconductor materials and devices
- Quantum optics and atomic interactions
- Inorganic Fluorides and Related Compounds
- Reading and Literacy Development
- Structural Engineering and Vibration Analysis
- Carbon Nanotubes in Composites
- Conducting polymers and applications
- Nonlinear Dynamics and Pattern Formation
- Intelligent Tutoring Systems and Adaptive Learning
- COVID-19 Clinical Research Studies
- X-ray Diffraction in Crystallography
- Crystal structures of chemical compounds
Nankai University
2016-2025
Zhengzhou University
2024
Southeast University
2024
State Key Laboratory of Digital Medical Engineering
2024
Beihang University
2023-2024
Shanghai Institute of Technology
2024
Shandong Normal University
2021
Chinese Academy of Medical Sciences & Peking Union Medical College
2020
Fifth Hospital of Shijiazhuang
2020
Hebei Medical University
2020
Abstract The linear electro-optic effect offers a valuable means to control light properties via an external electric field. Lithium niobate (LN), with its high coefficients and broad optical transparency ranges, stands out as prominent material for efficient modulators. recent advent of lithium niobate-on-insulator (LNOI) wafers has sparked renewed interest in LN compact photonic devices. In this study, we present modulator utilizing thin film sandwiched between top bottom gold (Au)...
Abstract Deep-ultraviolet nonlinear optical crystals are of great importance as key materials in generating coherent light with wavelength below 200 nm through cascaded frequency conversion solid-state lasers. However, the solely usable crystal practice, KBe 2 BO 3 F (KBBF), is still commercially unavailable because high toxicity beryllium-containing and extreme difficulty growth. Here, we report growth characteristics an beryllium-free polyphosphate, KLa(PO ) 4 . Centimeter-sized single...
The coronavirus disease 2019 (COVID-19) epidemic has been almost controlled in China under a series of policies, including "early diagnosis and early treatment". This study aimed to explore the association between treatment with Qingfei Paidu decoction (QFPDD) favorable clinical outcomes. In this retrospective multicenter study, we included 782 patients (males, 56 %; median age 46) confirmed COVID-19 from 54 hospitals nine provinces China, who were divided into four groups according...
Usage of lithium niobate in nonlinear optics is seriously hampered by optical damage, particular, where high intensity needed. Doping with magnesium can improve its resistance against damage. However, since a rather large dopant concentration required (more than 4.6mol% MgO) and the distribution coefficient unfavorable, it difficult to grow crystals quality. The authors show that doping zirconium, one obtain at same time higher lower threshold (only 2.0mol% ZrO2), near 1.0, low coercive...
A single crystal of CsLa(PO<sub>3</sub>)<sub>4</sub>has been successfully grown, and it exhibits a remarkable deep-UV cutoff edge 167 nm.
Integrated optical systems based on lithium niobate insulator (LNOI) have attracted the interest of researchers. Recently, erbium-doped LNOI lasers been realized. However, reported a relatively lower conversion efficiency and only operate in 1550 nm band. In this paper, we demonstrate an laser operating 1060 band high Q factor ytterbium-doped microdisk cavity. The threshold are 21.19 µW 1.36%, respectively. To our knowledge, is highest among rare-earth-doped lasers. This research extends...
In this study, we used a high-temperature solution to grow KBa2(PO3)5 (KBP), which is potential deep-ultraviolet (UV) nonlinear optical crystal. It congruent melting compound that solidifies in non-centrosymmetric crystal system monoclinic with the Pc space group. KBP exhibits powder second-harmonic response at 1064 nm incident radiation, an efficiency of 0.9 × KDP. wide transparency range, as cutoff absorption edge UV region short 167 nm. addition, performed Raman and IR spectroscopies on...
Erbium-ion-doped lithium niobate (LN) microcavity lasers working in the communication band have attracted extensive attention recently. However, their conversion efficiencies and laser thresholds still significant room to improve. Here, we prepared microdisk cavities based on erbium-ytterbium-co-doped LN thin film by using ultraviolet lithography, argon ion etching, a chemical-mechanical polishing process. Benefiting from erbium-ytterbium co-doping-induced gain coefficient improvement,...
Holographic display has attracted widespread interest because of its ability to show the complete information object and bring people an unprecedented sense presence. The absence ideal recording materials hampered realization their commercial applications. Here we report that response time a bismuth magnesium co-doped lithium niobate (LN:Bi,Mg) crystal is shortened 7.2 ms sensitivity as high 646 cm/J. was used demonstrate real-time holographic with refresh rate 60 Hz, popular high-definition...
ABSTRACT An electrochemical investigation for rutin on glassy carbon electrode is presented. adsorptive process observed. The maximum coverage the surface 5.09 × 10−10 mol/cm2, this area corresponding to a benzene ring with 3′,4′-dihydroxides adsorbed surface; other parts of keep away from surface. In meantime, new method determining medium 0.1 M acetate buffer solution (pH = 4.46), very sensitive polargraphic wave observed by using differential pulse voltammetry at about 0.29 V (vs....
Integrated and stable microlasers are indispensable building blocks of micro-photonics. Here, we report the realization an ytterbium-doped lithium niobate microring laser operating in 1060-nm band under pump a 980-nm-band laser. The monolithic has low threshold 59.32 µW relatively high output power 6.44 µW, state-of-the-art value for rare-earth ions-doped thin-film lasers. with desirable performance attractive scalability may find many applications niobite photonics.
As a promising candidate material for holographic displays, lithium niobate (LN) is limited by its slow photorefractive (PR) response. Recently, it was discovered that Bi3+, with lone-pair electrons, can effectively enhance the PR speed of LN crystals. However, this enhancement only effective in short-wavelength range visible light, and response time remains inadequate full-color dynamic displays. In paper, theoretical framework established to guide shallow energy-level doping We simulate...
The UV photorefraction of Zr-doped lithium niobate (LN:Zr) was investigated. experimental results show that LN:Zr crystals have high resistance against in the region as well visible range and can withstand a light intensity above 105 W/cm2. According to fitting erasing curves with green light, two-center O2−/−-defect model suggested. Our indicate is an excellent candidate for optical damage from spectrum.
The ability to amplify optical signals is of paramount importance in photonic integrated circuits (PICs). Recently, lithium niobate on insulator (LNOI) has attracted increasing interest as an emerging PIC platform. However, the shortage efficient active devices LNOI platform limits development amplification. Here, we report waveguide amplifier based erbium and ytterbium co-doped by using electron beam lithography inductively coupled plasma reactive ion etching process. We have demonstrated...
Light-induced domain reversals of Mg-doped, Zr-doped, and nominally pure LiNbO3 crystals were investigated with focused 514.5 nm laser beams. It was found the light-reduced values electric field for reversal are almost same, about 3 kV/mm. Inverted domains always first nucleate on −c surface within illuminated region but appear at edge spot +c surface. The light-induced inverted hard to be reversed by application a reverse or heating temperatures as high 600 °C. According these experimental...
Numerous studies have indicated that intrinsic defects in lithium niobate (LN) dominate its physical properties. In an Nb-rich environment, the structure consists of a niobium anti-site with four vacancies is considered most stable structure. Based on density functional theory (DFT), specific configuration LN were explored. The results consisted two as first neighbors and other second nearest Nb pure LN, similar was found doped LN. We dipole moment has no direct contribution to crystal...
Particular attention has been given to updatable or dynamic holographic displays in recent years. The absence of ideal recording materials hampered the realization their commercial applications. A lithium niobate crystal codoped with 1.0 mol. % bismuth and 6.0 magnesium grown a diameter 2-in. moderately large saturation diffraction efficiency 26% can be achieved, which corresponds refractive index change 2.45 × 10−5. However, photorefractive response time turns out only 13 ms, sensitivity...
MgO-doped LiNbO3 (LN:Mg) is famous for its high resistance to optical damage, but this phenomenon only occurs in visible and infrared regions, photorefraction not decreased enhanced ultraviolet region. Here we investigated a series of ZrO2 co-doped LN:Mg (LN:Mg,Zr) regarding their photorefractive properties. The damage experiment indicated that the against was significantly with increased doping concentration. Moreover, first-principles calculations manifested enhancement LN:Mg,Zr mainly...
Integrated optical systems based on lithium niobate insulator (LNOI) have shown great potential in recent years. However, the LNOI platform is facing a shortage of active devices. Considering significant progress made rare-earth-doped lasers and amplifiers, fabrication on-chip ytterbium-doped waveguide amplifiers electron-beam lithography inductively coupled plasma reactive ion etching was investigated. The signal amplification at lower pump power (<1 mW) achieved by fabricated amplifiers. A...