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| 1 | Optical vortices 30 years on:OAM manipulation from topological charge to multiple singularities显示文摘Thirty years ago,Coullet et al.proposed that a special optical field exists in laser cavities bearing some analogy with the superfluid vortex.Since then,optical vortices have been widely studied,inspired by the hydrodynamics sharing similar mathematics.Akin to a fluid vortex with a central flow singularity,an optical vortex beam has a phase singularity with a certain topological charge,giving rise to a hollow intensity distribution.Such a beam with helical phase fronts and orbital angular momentum reveals a subtle connection between macroscopic physical optics and microscopic quantum optics.These amazing properties provide a new understanding of a wide range of optical and physical phenomena,including twisting photons,spin–orbital interactions,Bose-Einstein condensates,etc.,while the associated technologies for manipulating optical vortices have become increasingly tunable and flexible.Hitherto,owing to these salient properties and optical manipulation technologies,tunable vortex beams have engendered tremendous advanced applications such as optical tweezers,high-order quantum entanglement,and nonlinear optics.This article reviews the recent progress in tunable vortex technologies along with their advanced applications. | Yijie Shen Xuejiao Wang Zhenwei Xie Changjun Min Xing Fu Qiang Liu Mali Gong Xiaocong Yuan | 2019 | Light(Science & Applications)2019，8，1： | 77 |
| 2 | Versatile on-chip light coupling and(de)multiplexing from arbitrary polarizations to controlled waveguide modes using an integrated dielectric metasurface显示文摘Metasurfaces have found broad applicability in free-space optics,while its potential to tailor guided waves remains barely explored.By synergizing the Jones matrix model with generalized Snell’s law under the phase-matching condition,we propose a universal design strategy for versatile on-chip mode-selective coupling with polarization sensitivity,multiple working wavelengths,and high efficiency concurrently.The coupling direction,operation frequency,and excited mode type can be designed at will for arbitrary incident polarizations,outperforming previous technology that only works for specific polarizations and lacks versatile mode controllability.Here,using silicon-nanoantenna-patterned silicon-nitride photonic waveguides,we numerically demonstrate a set of chip-scale optical couplers around 1.55μm,including mode-selective directional couplers with high coupling efficiency over 57%and directivity about 23 d B.Polarization and wavelength demultiplexer scenarios are also proposed with 67%maximum efficiency and an extinction ratio of 20 d B.Moreover,a chip-integrated twisted light generator,coupling free-space linear polarization into an optical vortex carrying 1 h orbital angular momentum(OAM),is also reported to validate the mode-control flexibility.This comprehensive method may motivate compact wavelength/polarization(de)multiplexers,multifunctional mode converters,on-chip OAM generators for photonic integrated circuits,and high-speed optical telecommunications. | YUAN MENG ZHOUTIAN LIU ZHENWEI XIE RIDE WANG TIANCHENG QI FUTAI HU HYUNSEOK KIM QIRONG XIAO XING FU QIANG WU SANG-HOON BAE MALI GONG XIAOCONG YUAN | 2020 | Photonics Research2020，8，4： | 8 |
| 3 | Single-beam two-photon three-dimensional optical storage in a pyrryl-substituted fulgide photochromic material显示文摘We introduce a high-density three-dimensional optical data storage approach by using a pyrryl-sub-stituted fulgide photochromic material with a method of single-beam two-photon recording and fluorescence confocal readout. The detailed information about the photochromic material and the experimental setup are presented. The experiments about multi-layered recording and readout are carried out with a 100-μm-thick transparent photochromic material film. The results show that the lateral resolution is better than 1 μm, and the longitudinal resolution is about 3 μm. Besides, the readout times for the recorded data aredesirable when using a readout laser power smaller than 5 mW. | Ningfang Liao Mali Gong Duanyi Xu Guosheng Qi Kai Zhang | 2001 | Chinese Science Bulletin2001，46，22： | 6 |
| 4 | Optical meta-waveguides for integrated photonics and beyond显示文摘The growing maturity of nanofabrication has ushered massive sophisticated optical structures available on a photonic chip.The integration of subwavelength-structured metasurfaces and metamaterials on the canonical building block of optical waveguides is gradually reshaping the landscape of photonic integrated circuits,giving rise to numerous metawaveguides with unprecedented strength in controlling guided electromagnetic waves.Here,we review recent advances in meta-structured waveguides that synergize various functional subwavelength photonic architectures with diverse waveguide platforms,such as dielectric or plasmonic waveguides and optical fibers.Foundational results and representative applications are comprehensively summarized.Brief physical models with explicit design tutorials,either physical intuition-based design methods or computer algorithms-based inverse designs,are cataloged as well.We highlight how meta-optics can infuse new degrees of freedom to waveguide-based devices and systems,by enhancing light-matter interaction strength to drastically boost device performance,or offering a versatile designer media for manipulating light in nanoscale to enable novel functionalities.We further discuss current challenges and outline emerging opportunities of this vibrant field for various applications in photonic integrated circuits,biomedical sensing,artificial intelligence and beyond. | Yuan Meng Yizhen Chen Longhui Lu Yimin Ding Andrea Cusano Jonathan A.Fan Qiaomu Hu Kaiyuan Wang Zhenwei Xie Zhoutian Liu Yuanmu Yang Qiang Liu Mali Gong Qirong Xiao Shulin Sun Minming Zhang Xiaocong Yuan Xingjie Ni | 2021 | Light(Science & Applications)2021，10，12： | 6 |
| 5 | Broadband terahertz wave generation from an epsilon-near-zero material显示文摘Broadband light sources emitting in the terahertz spectral range are highly desired for applications such as noninvasive imaging and spectroscopy.Conventionally,THz pulses are generated by optical rectification in bulk nonlinear crystals with millimetre thickness,with the bandwidth limited by the phase-matching condition.Here we demonstrate broadband THz emission via surface optical rectification from a simple,commercially available 19nmthick indium tin oxide(ITO)thin film.We show an enhancement of the generated THz signal when the pump laser is tuned around the epsilon-near-zero(ENZ)region of ITO due to the pump laser field enhancement associated with the ENZ effect.The bandwidth of the THz signal generated from the ITO film can be over 3 THz,unrestricted by the phasematching condition.This work offers a new possibility for broadband THz generation in a subwavelength thin film made of an ENZ material,with emerging physics not found in existing nonlinear crystals. | Wenhe Jia Meng Liu Yongchang Lu Xi Feng Qingwei Wang Xueqian Zhang Yibo Ni Futai Hu Mali Gong Xinlong Xu Yuanyuan Huang Weili Zhang Yuanmu Yang Jiaguang Han | 2021 | Light(Science & Applications)2021，10，1： | 4 |
| 6 | Creation and control of high-dimensional multi-partite classically entangled light显示文摘Vector beams,non-separable in spatial mode and polarisation,have emerged as enabling tools in many diverse applications,from communication to imaging.This applicability has been achieved by sophisticated laser designs controlling the spin and orbital angular momentum,but so far is restricted to only two-dimensional states.Here we demonstrate the first vectorially structured light created and fully controlled in eight dimensions,a new state-of-the-art.We externally modulate our beam to control,for the frst time,the complete set of classical Greenberger-Horne-Zeilinger(GHZ)states in paraxial structured light beams,in analogy with high-dimensional multi-partite quantum entangled states,and introduce a new tomography method to verify their fidelity.Our complete theoretical framework reveals a rich parameter space for further extending the dimensionality and degrees of freedom,opening new pathways for vetorilly structured light in the classical and quantum regimes. | Yjie Shen Iaac Nape Xilin Yang Xing Fu Mali Gong Darryl Naidoo Andrew Forbes | 2021 | Light(Science & Applications)2021，10，5： | 4 |
| 7 | Dual-wavelength bidirectional pumped high-power Raman fiber laser显示文摘In this paper, we reported both the experimental demonstration and theoretical analysis of a Raman fiber laser based on a master oscillator–power amplifier configuration. The Raman fiber laser adopted the dual-wavelength bidirectional pumping configuration, utilizing 976 nm laser diodes and 1018 nm fiber lasers as the pump sources. A 60-m-long25/400 μm ytterbium-doped fiber was used to convert the power from 1070 to 1124 nm, realizing a maximum power output of 3.7 kW with a 3 dB spectral width of 6.8 nm. Moreover, we developed a multi-frequency model taking into consideration the Raman gain spectrum and amplified spontaneous emission. The calculated spectral broadening of both the forward and backward laser was in good agreement with the experimental results. Finally, a 1.5 kW, 1183 nm second-order Raman fiber laser was further experimentally demonstrated by the addition of a 70-m-long germaniumdoped passive fiber. | Zehui Wang Qirong Xiao Yusheng Huang Jiading Tian Dan Li Ping Yan Mali Gong | 2019 | High Power Laser Science and Engineering2019，7，1： | 4 |
| 8 | Spatiotemporal characterization of laser pulse amplification in double-pass active mirror geometry显示文摘We present a spatiotemporal model of pulse amplification in the double-pass active mirror(AM)geometry.Three types of overlap condition are studied,and the spatiotemporal scaling under the four-pulse overlapping(4 PO)condition is fully characterized for the first time,by mapping the temporal and spatial segments of beam to the instantaneous gain windows.Furthermore,the influence of spatiotemporal overlaps on the amplified energy,pulse distortion and intensity profile is unraveled for both AM and zigzag configurations.The model,verified by excellent agreement between the predicted and measured results,can be a powerful tool for designing and optimizing high energy multi-pass solid-state laser amplifiers with AM,zigzag and other geometries. | Tinghao Liu Qiang Liu Zhan Sui Mali Gong Xing Fu | 2020 | High Power Laser Science and Engineering2020，8，3： | 2 |
| 9 | Aliasing in Minification of Digital Images显示文摘 | Zhang Haitao Zhao Dazun Gong Mali | 2001 | Optical Engineering2001，40，11： | 1 |
| 10 | The dispersive properties of a dielectric rod loaded waveguide immersed in a magnetized annular plasma显示文摘 | LI Wei GONG Mali WEI Yanyu | 2004 | Chin Phys Lett2004，13，1： | 1 |
| 11 | An approxi- mate analytic solution of strongly pumped Yb-doped doub- le-clad fiber lasers without neglecting the scattering loss 显示文摘 | XIAO Limin YAN Ping GONG Mali | 2004 | Optics Communications2004，230，46： | 1 |
| 12 | Numerical modeling of the thermal lensing effect in a grazing-incidence laser显示文摘 | Yan Xingpeng Gong Mali He Fahong | 2009 | Optics Communications2009，282，： | 1 |
| 13 | Numerical modeling of transverse mode competition in strongly pumped multimode fiber lasers and amplifiers显示文摘 | Gong Mali Yuan Yanyang Li Chen | 2007 | Optics Express2007，15，6： | 1 |
| 14 | new methods to achieve high sensitivity of objective lens actuator in optical disc system显示文摘 | Lei Huang Mali Gong Weipu Jia | 2001 | Jpn J Appl Phys2001，40，： | 1 |
| 15 | Linearly-polarized single-transverse-mode high-energy multi-ten nanosecond fiber amplifier with 50 W average power 显示文摘 | Ye Changgeng Gong Mali Yan Ping | 2006 | Optics Express2006，14，17： | 1 |
| 16 | Linearly-polarized single-transverse-mode high-energy muhi-ten nanosecond fiber amplifier with 50 W average power显示文摘 | Ye Changgneg Gong Mali Yan Ping | 2006 | Opt Express2006，14，17： | 1 |
| 17 | Movement interferences analysis for objective lens actuator in optical disc system显示文摘 | Huang Lei Gong Mali Jia Weipu | 2002 | Sensors and Actuators A:Physical2002，102，12： | 1 |
| 18 | Multi-coupler sidepumped Yb-doped double-clad fibre laser and pump light leakage at coupler显示文摘 | Ou Pang Yan Ping Gong Mali | 2004 | Electronics Letter2004，40，7： | 1 |
| 19 | Analysis on the temperature distribution and thermal effects in comer- pumped slab lasers 显示文摘 | Lu Fuyuan Gong Mali Xue Haizhong | 2007 | Optics and Lasers in Engineering2007，45，： | 1 |
| 20 | Efficient corner-pumped Yb:YAG_YAG composite slab laser显示文摘 | Gong Mali Lu Fuyuan Liu Qiang | 2006 | Appl Opt2006，45，16： | 1 |
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