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| 1 | Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining显示文摘We report on second harmonic generation(SHG) in on-chip high-Q(>105) lithium niobate(Li Nb O3, LN) microresonators fabricated by femtosecond laser micromachining. We examine the efficiency of SHG with either a continuous-wave(CW) or an ultrashort pulsed pump laser. The normalized conversion efficiencies of SHG obtained with the CW and pulsed pump lasers are measured to be 1.35×10?5 m W?1 and 2.30×10?6 m W?1, respectively. | LIN JinTian XU YingXin FANG ZhiWei WANG Min WANG NengWen QIAO LingLing FANG Wei CHENG Ya | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，11： | 25 |
| 2 | Advances in on-chip photonic devices based on lithium niobate on insulator显示文摘Crystalline lithium niobate(LN)is an important optical material because of its broad transmission window that spans from ultraviolet to mid-infrared and its large nonlinear and electro-optic coefficients.Furthermore,the recent development and commercialization of LN-on-insulator(LNOI)technology has opened an avenue for the realization of integrated on-chip photonic devices with unprecedented performances in terms of propagation loss,optical nonlinearity,and electro-optic tunability.This review begins with a brief introduction of the history and current status of LNOI photonics.We then discuss the fabrication techniques of LNOI-based photonic structures and devices.The recent revolution in the LN photonic industry has been sparked and is still being powered by innovations of the nanofabrication technology of LNOI,which enables the production of building block structures,such as optical microresonators and waveguides of unprecedented optical qualities.The following sections present various on-chip LNOI devices categorized into nonlinear photonic and electro-optic tunable devices and photonic-integrated circuits.Some conclusions and future perspectives are provided. | JINTIAN LIN FANG BO YA CHENG JINGJUN XU | 2020 | Photonics Research2020，8，12： | 26 |
| 3 | Optimization of control parameters of droplet density in citrus trees using UAVs and the Taguchi method显示文摘The control parameters of the unmanned aerial vehicle(UAV)should be carefully designed to improve UAV spraying performance on citrus trees.The present study investigated the optimal droplet distribution control parameters in citrus trees using a UAV and the Taguchi method,of which optimal results were observed with an inverted triangle citrus tree canopy shape,a spraying height of 1.40 m,and a flight speed of 1.0 m/s.Among the discussed control parameters,the flight speed presented the most significant effect with a contribution percentage of 74.0%.The established multiple regression model predicted an optimal spraying height of 1.27 m and a maximum droplet density of 35.39 droplets/cm2.In addition,the effects of individual control parameter on the droplet density of the lower layer of citrus trees were systematically analyzed,of which inverted triangle shape more significantly affected the droplet density of the lower layer and presented an 82.0%increase in droplet density as compared to the triangle shape.An improvement of 59.6%in the lower layer droplet density was observed at a spraying height of 1.40 m.In addition,the other spraying heights did not present significant differences in their coefficient of variation(CV)values. | Chaojun Hou Yu Tang Shaoming Luo Jintian Lin Yong He Jiajun Zhuang Weifeng Huang | 2019 | International Journal of Agricultural and Biological Engineering2019，12，4： | 4 |
| 4 | Electro-optic tuning of a single-frequencyultranarrow linewidth microdisk laser显示文摘Single-frequency ultranarrow linewidth on-chip microlasers with a fast wavelength tunability play a game-changing role in a broad spectrum of applications ranging from coherent communication,light detection and ranging,to metrology and sensing.Design and fabrication of such light sources remain a challenge due to the difficulties in making a laser cavity that has an ultrahigh optical quality(Q)factor and supports only a single lasing frequency simultaneously.Here,we demonstrate a unique single-frequency ultranarrow linewidth lasing mechanism on an erbium ion-doped lithium niobate(LN)microdisk through simultaneous excitation of high-Q polygon modes at both pump and laser wavelengths.As the polygon modes are sparse within the optical gain bandwidth compared with the whispering gallery mode counterpart,while their Q factors(above 10 million)are even higher due to the significantly reduced scattering on their propagation paths,single-frequency lasing with a linewidth as narrow as 322 Hz is observed.The measured linewidth is three orders of magnitude narrower than the previous record in on-chip LN microlasers.Finally,enabled by the strong linear electro-optic effect of LN,real-time electro-optical tuning of the microlaser with a high tuning efficiency of∼50 pm∕100 V is demonstrated. | Jintian Lin Saeed Farajollahi Zhiwei Fang Ni Yao Renhong Gao Jianglin Guan Li Deng Tao Lu Min Wang Haisu Zhang Wei Fang Lingling Qiao Ya Cheng | 2022 | Advanced Photonics2022，4，3： | 4 |
| 5 | An effective spray drift-reducing method for a plant-protection unmanned aerial vehicle显示文摘A spraying system for a plant-protection unmanned aerial vehicle(UAV)was designed to reduce spray drift.A custom low-speed wind tunnel was constructed to generate a wind speed ranging from 0 to 5.92 m/s.The results showed that the wind speed was attenuated with an increase in distance.To compensate for the attenuation,a linear-fitting model was adopted.Then,the relationship between the spraying pressure and atomization rate was analyzed,and a fuzzy algorithm was adopted to adjust the spraying angle and pressure according to the wind speed and its changing rate.Finally,an evaluation of the proposed system in the compensated wind tunnel was conducted,and the drift distance was reduced by 33.7%compared with the system without adjustment of the spraying angle and pressure. | Yayong Chen Chaojun Hou Yu Tang Jiajun Zhuang Jintian Lin Shaoming Luo | 2019 | International Journal of Agricultural and Biological Engineering2019，12，5： | 2 |
| 6 | Thermal ablation versus conventional regional hyperthermia has greater anti-tumor activity against melanoma in mice by upregulating CD4^+ cells and enhancing IL-2 secretion显示文摘为了决定常规过高热( 42 45 °C )或脱离治疗( >50 °C )是否完成更好的 synergistic 效果在上,指导 cytotoxicity 和反肿瘤免疫,我们比较了二过高热温度的治疗学的效果, 43 和 55 °C ,以 cytotoxicity 并且在在一只老鼠的有免疫力的功能的规定上面恶意的黑瘤模型。忍受黑瘤的老鼠被直接为 10 min 为 30 min 或 55 ° C 在 43 ° C 的温度与一盏加热的灯把地区性的过高热用于肿瘤小瘤对待。肿瘤生长曲线和老鼠幸存率被观察。为了调查导致过高热的免疫学的反应,外部血 CD4 + 和 CD8, + T 房间和浆液 IL-2 水平被决定。我们的结果在脱离温度显示了地区性的过高热的那应用(例如 55 ° C ) 比完成了更好的 synergistic 反肿瘤效果做了常规过高热(43 ° C ) 。外部血 CD4 + T 房间和浆液 IL-2 水平的数字的重要增加多半贡献了内在的机制。 | Yingying Zhang Wei Zhang Cuanying Geng Tongjun Lin Xiaowen Wang Lingyun Zhao Jintian Tang | 2009 | Progress in Natural Science:Materials International2009，19，12： | 0 |
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