cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57760/sciencedb.07528
title: On-chip microdisk laser on Yb3+-doped thin-film lithium niobate
title: On-chip microdisk laser on Yb3+-doped thin-film lithium niobate

description: We demonstrate an on-chip Yb3+-doped lithium niobate (LN) microdisk laser. The intrinsic quality factors of the fabricated Yb3+-doped LN microdisk resonator are measured up to 3.79 × 105 at 976 nm wavelength and 1.1 × 106 at 1514 nm wavelength. The multi-mode laser emissions are obtained in a band from 1020 nm to 1070 nm pumped by 984 nm laser and with the low threshold of 103 μW, resulting in a slope efficiency of 0.53% at room temperature. Furthermore, the second-harmonic frequency of pump light and the sum-frequency of the pump light and laser emissions are both generated in the on-chip Yb3+-doped LN microdisk benefited from the strong χ(2) nonlinearity of LN. These microdisk lasers are expected to contribute to the high-density integration of LNOI-based photonic chip.
description: We demonstrate an on-chip Yb3+-doped lithium niobate (LN) microdisk laser. The intrinsic quality factors of the fabricated Yb3+-doped LN microdisk resonator are measured up to 3.79 × 105 at 976 nm wavelength and 1.1 × 106 at 1514 nm wavelength. The multi-mode laser emissions are obtained in a band from 1020 nm to 1070 nm pumped by 984 nm laser and with the low threshold of 103 μW, resulting in a slope efficiency of 0.53% at room temperature. Furthermore, the second-harmonic frequency of pump light and the sum-frequency of the pump light and laser emissions are both generated in the on-chip Yb3+-doped LN microdisk benefited from the strong χ(2) nonlinearity of LN. These microdisk lasers are expected to contribute to the high-density integration of LNOI-based photonic chip.
DOI: 10.57760/sciencedb.06790
title: Electro-optically tunable microring laser monolithically integrated on lithium niobate on insulator
title: Electro-optically tunable microring laser monolithically integrated on lithium niobate on insulator

description: We demonstrate monolithic integration of an electro-optically (EO) tunable microring laser on lithium niobate on insulator (LNOI) platform. The device is fabricated by photolithography assisted chemo-mechanical etching, and the pump laser is evanescently coupled into the erbium (Er3+)-doped lithium niobate (LN) microring laser using an undoped LN waveguide mounted above the microring. The quality factor of the LN microring resonator is measured as high as 1.54 × 105 at the wavelength of 1542 nm. Lasing action can be observed at a pump power threshold below 3.5 mW using a 980 nm continuous-wave pump laser. Finally, tuning of the laser wavelength is achieved by varying the electric voltage on the microelectrodes fabricated in the vicinity of a microring waveguide, showing an EO coefficient of 0.33 pm/V.
description: We demonstrate monolithic integration of an electro-optically (EO) tunable microring laser on lithium niobate on insulator (LNOI) platform. The device is fabricated by photolithography assisted chemo-mechanical etching, and the pump laser is evanescently coupled into the erbium (Er3+)-doped lithium niobate (LN) microring laser using an undoped LN waveguide mounted above the microring. The quality factor of the LN microring resonator is measured as high as 1.54 × 105 at the wavelength of 1542 nm. Lasing action can be observed at a pump power threshold below 3.5 mW using a 980 nm continuous-wave pump laser. Finally, tuning of the laser wavelength is achieved by varying the electric voltage on the microelectrodes fabricated in the vicinity of a microring waveguide, showing an EO coefficient of 0.33 pm/V.
DOI: 10.57760/sciencedb.07529
title: A high-Q lithium niobate microresonator integrated with a silicon nitride waveguide in vertical configuration for evanescent light coupling
title: A high-Q lithium niobate microresonator integrated with a silicon nitride waveguide in vertical configuration for evanescent light coupling

description: We demonstrate hybrid integration of a lithium niobate microring resonator with a silicon nitride waveguide in vertical configuration to achieve efficient light coupling. The microring resonator is fabricated on a lithium niobate on insulator (LNOI) substrate using photolithography assisted chemo-mechanical etching (PLACE). A fused silica cladding layer is added on the LNOI ring resonator. The silicon nitride waveguide embedded in the fused silica layer is fabricated by producing a trench in the fused silica using focused ion beam (FIB) etching followed by deposition of silicon nitride into the trench to form the embedded waveguide. The FIB etching ensures the positioning accuracy between the waveguide and the ring resonator. We achieve Q-factors as high as 1.4´107 can in the integrated device.
description: We demonstrate hybrid integration of a lithium niobate microring resonator with a silicon nitride waveguide in vertical configuration to achieve efficient light coupling. The microring resonator is fabricated on a lithium niobate on insulator (LNOI) substrate using photolithography assisted chemo-mechanical etching (PLACE). A fused silica cladding layer is added on the LNOI ring resonator. The silicon nitride waveguide embedded in the fused silica layer is fabricated by producing a trench in the fused silica using focused ion beam (FIB) etching followed by deposition of silicon nitride into the trench to form the embedded waveguide. The FIB etching ensures the positioning accuracy between the waveguide and the ring resonator. We achieve Q-factors as high as 1.4´107 can in the integrated device.
DOI: 10.57760/sciencedb.06791
title: Automated synthesis of gadopentetate dimeglumine through solid-liquid reaction in femtosecond laser fabricated microfluidic chips
title: Automated synthesis of gadopentetate dimeglumine through solid-liquid reaction in femtosecond laser fabricated microfluidic chips

description: Despite the continuously increased requirement on automated synthesis of medicines for distributed manufacturing and personal care, it remains a challenge to realize automated synthesis which requires solid-liquid phase reactions. In this work, we demonstrated an automated solid-liquid synthesis for gadopentetate dimeglumine, the most widely used magnetic resonance imaging (MRI) contrast agent. The high-efficiency reaction was performed in a 3D microfluidic chip which was fabricated by femtosecond laser micromachining. The structure of the chip realized 3D shear flow which was essential for highly efficient mixing and movement of the solid-liquid mixtures. Ultraviolet visible (UV–vis) spectrometer was employed for in-line analysis to help automation of this system. Comparing with the round-bottom flask system, this synthetic system showed significantly higher reaction rate, indicating the advantage of the 3D microfluidic technology in micro chemical engineering.
description: Despite the continuously increased requirement on automated synthesis of medicines for distributed manufacturing and personal care, it remains a challenge to realize automated synthesis which requires solid-liquid phase reactions. In this work, we demonstrated an automated solid-liquid synthesis for gadopentetate dimeglumine, the most widely used magnetic resonance imaging (MRI) contrast agent. The high-efficiency reaction was performed in a 3D microfluidic chip which was fabricated by femtosecond laser micromachining. The structure of the chip realized 3D shear flow which was essential for highly efficient mixing and movement of the solid-liquid mixtures. Ultraviolet visible (UV–vis) spectrometer was employed for in-line analysis to help automation of this system. Comparing with the round-bottom flask system, this synthetic system showed significantly higher reaction rate, indicating the advantage of the 3D microfluidic technology in micro chemical engineering.
DOI: 10.57760/sciencedb.07530
title: Low-loss optofluidic waveguides in fused silica enabled by spatially shaped femtosecond laser assisted etching combined with carbon dioxide laser irradiation
title: Low-loss optofluidic waveguides in fused silica enabled by spatially shaped femtosecond laser assisted etching combined with carbon dioxide laser irradiation

description: We demonstrate the fabrication of low-loss optofluidic waveguides encapsulated in fused silica glass using femtosecond laser microfabrication followed by carbon dioxide laser irradiation. Spatially-shaped femtosecond laser-assisted chemical etching is first used to fabricate microchannels with circular cross-sections and a string of open extra-access ports in the glass. Further, the carbon dioxide laser direct writing on the glass surface is used to create a thermal reflow effect of etched glass microstructures for simultaneously polishing all internal surfaces of channels and sealing the extra-access ports. With this effect, the inner surface roughness of the etched microchannels can be reduced to ∼ 40 nm. Finally, a single-mode microfluidic optical waveguide with a propagation loss of ∼ 0.78 dB/cm at 1310 nm is obtained inside the glass by filling a mixture solution of decane and liquid paraffin into a laser-polished microchannel.
description: We demonstrate the fabrication of low-loss optofluidic waveguides encapsulated in fused silica glass using femtosecond laser microfabrication followed by carbon dioxide laser irradiation. Spatially-shaped femtosecond laser-assisted chemical etching is first used to fabricate microchannels with circular cross-sections and a string of open extra-access ports in the glass. Further, the carbon dioxide laser direct writing on the glass surface is used to create a thermal reflow effect of etched glass microstructures for simultaneously polishing all internal surfaces of channels and sealing the extra-access ports. With this effect, the inner surface roughness of the etched microchannels can be reduced to ∼ 40 nm. Finally, a single-mode microfluidic optical waveguide with a propagation loss of ∼ 0.78 dB/cm at 1310 nm is obtained inside the glass by filling a mixture solution of decane and liquid paraffin into a laser-polished microchannel.
DOI: 10.57760/sciencedb.06793
title: Size-controlled flow synthesis of metal-organic frameworks crystals monitored by in-situ ultraviolet–visible absorption spectroscopy
title: Size-controlled flow synthesis of metal-organic frameworks crystals monitored by in-situ ultraviolet–visible absorption spectroscopy

description: Size-controlled flow synthesis of nanoporous particles are of considerable interest for future industrial applications, however, is facing challenges due to lack of in-situ method for size-characterization in fluidic environment. We present that ultraviolet-visible (UV–vis) absorption spectroscopy can be integrated into a flow-synthesis system which was produced by femtosecond laser micromachining. The shift of the absorption peak position of the ex-situ and in-situ UV–vis spectra correlates to variation of size of porous metal-organic frameworks crystals. ZIF-67 crystals with a size in the range from 200 nm to 1025 nm are fabricated with the assistance of tri-ethylamine under monitoring of in-situ UV–vis spectra. The ZIF-67 crystals are converted into nanoporous carbons particles with controlled sizes. These materials show size-dependent performance in Na-ion battery and size-independent performance in metal/H2O seawater battery
description: Size-controlled flow synthesis of nanoporous particles are of considerable interest for future industrial applications, however, is facing challenges due to lack of in-situ method for size-characterization in fluidic environment. We present that ultraviolet-visible (UV–vis) absorption spectroscopy can be integrated into a flow-synthesis system which was produced by femtosecond laser micromachining. The shift of the absorption peak position of the ex-situ and in-situ UV–vis spectra correlates to variation of size of porous metal-organic frameworks crystals. ZIF-67 crystals with a size in the range from 200 nm to 1025 nm are fabricated with the assistance of tri-ethylamine under monitoring of in-situ UV–vis spectra. The ZIF-67 crystals are converted into nanoporous carbons particles with controlled sizes. These materials show size-dependent performance in Na-ion battery and size-independent performance in metal/H2O seawater battery
DOI: 10.57760/sciencedb.06798
title: Monolithically integrated active passive waveguide array fabricated on thin film lithium niobate using a single continuous photolithography process
title: Monolithically integrated active passive waveguide array fabricated on thin film lithium niobate using a single continuous photolithography process

description: We demonstrate a robust low-loss optical interface by tiling passive (i.e., without doping of active ions) thin film lithium niobate (TFLN) and active (i.e., doped with rare earth ions) TFLN substrates for monolithic integration of passive/active lithium niobate photonics. The tiled substrates composed of both active and passive areas allow to pattern the mask of the integrated active passive photonic device at once using a single continuous photolithography process. The interface loss of tiled substrate is measured as low as 0.26 dB. Thanks to the stability provided by this approach, a four-channel waveguide amplifier is realized in a straightforward manner, which shows a net gain of ~5 dB at 1550-nm wavelength and that of ~8 dB at 1530-nm wavelength for each channel. The robust low-loss optical interface for passive/active photonic integration will facilitate large-scale high performance photonic devices which require on-chip light sources and amplifiers. 
description: We demonstrate a robust low-loss optical interface by tiling passive (i.e., without doping of active ions) thin film lithium niobate (TFLN) and active (i.e., doped with rare earth ions) TFLN substrates for monolithic integration of passive/active lithium niobate photonics. The tiled substrates composed of both active and passive areas allow to pattern the mask of the integrated active passive photonic device at once using a single continuous photolithography process. The interface loss of tiled substrate is measured as low as 0.26 dB. Thanks to the stability provided by this approach, a four-channel waveguide amplifier is realized in a straightforward manner, which shows a net gain of ~5 dB at 1550-nm wavelength and that of ~8 dB at 1530-nm wavelength for each channel. The robust low-loss optical interface for passive/active photonic integration will facilitate large-scale high performance photonic devices which require on-chip light sources and amplifiers.
DOI: 10.57760/sciencedb.06801
title: multiple meta-atoms simulation and related figures
title: 多个超原子结构仿真及相关图片

description: The simulation model and optimization parameters of the basic structure to achieve chiral selection and optical rotation effects in the paper
description: The simulation model and optimization parameters of the basic structure to achieve chiral selection and optical rotation effects in the paper
DOI: 10.57760/sciencedb.06803
title: Polarization-insensitive achromatic metalens based on computational wavefront coding
title: Polarization-insensitive achromatic metalens based on computational wavefront coding

description: Broadband achromatic metalens imaging is of great interest in various applications, such as integrated imaging and augmented/virtual reality display. Current methods of achromatic metalenses mainly rely on the compensation of a linear phase dispersion implemented with complex nanostructures. Here, we propose and experimentally demonstrate a polarizationinsensitive achromatic metalens (PIA-ML) based on computational wavefront coding. In this method, simple circular or square nanopillars are individually coded such that the focal depths at wavelengths at both ends of the achromatic bandwidth overlap at the designed focal plane, which removes the limitation of requiring a linear phase dispersion. An optimized PIA-ML that works in the full optical communication band from 1300 to 1700nm was obtained using a particle swarm optimization algorithm. Experimental results show that both focusing and imaging of the fabricated metalens are consistent with theoretical predictions within the broadband wavelength range, which provides a new methodology for ultra-broadband achromatic imaging with simple-shaped nanostructures.
description: Broadband achromatic metalens imaging is of great interest in various applications, such as integrated imaging and augmented/virtual reality display. Current methods of achromatic metalenses mainly rely on the compensation of a linear phase dispersion implemented with complex nanostructures. Here, we propose and experimentally demonstrate a polarizationinsensitive achromatic metalens (PIA-ML) based on computational wavefront coding. In this method, simple circular or square nanopillars are individually coded such that the focal depths at wavelengths at both ends of the achromatic bandwidth overlap at the designed focal plane, which removes the limitation of requiring a linear phase dispersion. An optimized PIA-ML that works in the full optical communication band from 1300 to 1700nm was obtained using a particle swarm optimization algorithm. Experimental results show that both focusing and imaging of the fabricated metalens are consistent with theoretical predictions within the broadband wavelength range, which provides a new methodology for ultra-broadband achromatic imaging with simple-shaped nanostructures.
DOI: 10.57760/sciencedb.06804
title: Mechanism of Surface Defects in Ultra-Precision Machining of Sesquioxide Laser Crystal Tm: GdScO3
title: GdScO3晶体元件精密加工过程表面层缺陷产生机理

description: It is well known that the surface quality of laser gain crystal elements is very high in or- 9der to ensure the stability of laser system and laser output quality. In the ultra-precision machin- 10ing process of a new sesquioxide laser crystal Tm: GdScO3, it is required to achieve very high sur- 11face shape and very low surface defects. In this paper, the molecular dynamics simulation model 12of single particle grinding is established. It is found that the normal load and tangential friction 13imposed by abrasive particles on the surface of components cause the spalling of atoms on the 14substrate surface, which constitutes the removal of materials at the macro-level. At the same time, 15it causes the displacement of the sub surface atoms, which constitutes the microscopic defects in 16the structure. Through the structural characterization of macro defects, it is confirmed that the es- 17sence of micro defects is the amorphous and distortion of surface structure, and the depth can 18reach 100 nm. The results of lapping and polishing experiments show that the adjustment of 19pressure has limited effect on the improvement of surface defects in the process of machining 20crystal elements with granular abrasive. 2
description: It is well known that the surface quality of laser gain crystal elements is very high in or- 9der to ensure the stability of laser system and laser output quality. In the ultra-precision machin- 10ing process of a new sesquioxide laser crystal Tm: GdScO3, it is required to achieve very high sur- 11face shape and very low surface defects. In this paper, the molecular dynamics simulation model 12of single particle grinding is established. It is found that the normal load and tangential friction 13imposed by abrasive particles on the surface of components cause the spalling of atoms on the 14substrate surface, which constitutes the removal of materials at the macro-level. At the same time, 15it causes the displacement of the sub surface atoms, which constitutes the microscopic defects in 16the structure. Through the structural characterization of macro defects, it is confirmed that the es- 17sence of micro defects is the amorphous and distortion of surface structure, and the depth can 18reach 100 nm. The results of lapping and polishing experiments show that the adjustment of 19pressure has limited effect on the improvement of surface defects in the process of machining 20crystal elements with granular abrasive. 2
DOI: 10.57760/sciencedb.06805
title: Micro-Doppler effect based vibrating object imaging of coherent detection GISC lidar： Experimental Data
title: 基于相干探测GISC雷达微多普勒效应探测的振动目标成像实验数据

description: The concrete parameters in the experiments are as follow: the objects consist of two slots, each with width 1 mm, and the distance of them is about 2 mm.The distance between the objects and the lens is 0.5 m. The vibrating frequency of the speaker is 500 Hz. The patterns preloaded in the DMD are Hadamard patterns. The patterns numberis 1024. The transverse size of the pattern at the DMD plane is set as 109 µm × 109 µm and we choose a reflection area with 32 × 32 pixels (one pixel is equal to the transverse size of thepatterns) for projection. The measurement number is 1,024.
description: The concrete parameters in the experiments are as follow: the objects consist of two slots, each with width 1 mm, and the distance of them is about 2 mm.The distance between the objects and the lens is 0.5 m. The vibrating frequency of the speaker is 500 Hz. The patterns preloaded in the DMD are Hadamard patterns. The patterns numberis 1024. The transverse size of the pattern at the DMD plane is set as 109 µm × 109 µm and we choose a reflection area with 32 × 32 pixels (one pixel is equal to the transverse size of thepatterns) for projection. The measurement number is 1,024.
DOI: 10.57760/sciencedb.07531
title: High-quality-factor optical microresonators fabricated on lithium niobate thin film with an electro-optical tuning range spanning over one free spectral range
title: High-quality-factor optical microresonators fabricated on lithium niobate thin film with an electro-optical tuning range spanning over one free spectral range

description: We demonstrate high-quality (intrinsic Q factor ∼2.8 × 106) racetrack microresonators fabricated on lithium niobate thin film with a free spectral range (FSR) of ∼86 pm. By integrating microelectrodes alongside the two straight arms of the racetrack resonator, the resonance wavelength around 1550 nm can be red shifted by 92 pm when the electric voltage is raised from −100 V to 100 V. The microresonators with the tuning range spanning over a full FSR are fabricated using photolithography assisted chemo-mechanical etching.
description: We demonstrate high-quality (intrinsic Q factor ∼2.8 × 106) racetrack microresonators fabricated on lithium niobate thin film with a free spectral range (FSR) of ∼86 pm. By integrating microelectrodes alongside the two straight arms of the racetrack resonator, the resonance wavelength around 1550 nm can be red shifted by 92 pm when the electric voltage is raised from −100 V to 100 V. The microresonators with the tuning range spanning over a full FSR are fabricated using photolithography assisted chemo-mechanical etching.
DOI: 10.57760/sciencedb.07532
title: Evolution properties of a partially coherent twisted Laguerre–Gaussian pulsed beam propagating through anisotropic atmospheric turbulence
title: Evolution properties of a partially coherent twisted Laguerre–Gaussian pulsed beam propagating through anisotropic atmospheric turbulence

description: Data for paper titled by Evolution properties of a partially coherent twisted Laguerre–Gaussian pulsed beam propagating through anisotropic atmospheric turbulence
description: Data for paper titled by Evolution properties of a partially coherent twisted Laguerre–Gaussian pulsed beam propagating through anisotropic atmospheric turbulence