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Laser interference fabrication of large-area functional periodic structure surface

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Frontiers of Mechanical Engineering 2018年第4期13卷 493-503页

作者： Lei WANG Zi-Han WANG Yan-Hao YU hong-bo sun State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 China

Functional periodic structures have attracted significant interest due to their natural capabilities in regulating surface energy, surface effective refractive index, and diffraction. Several technologies are used for the fabrication of these functional structures. The laser interference technique in particular has received attention because of its simplicity, low cost, and high-efficiency fabrication of large-area, micro/nanometer-scale, and periodically patterned structures in air conditions. Here, we reviewed the work on laser interference fabrication of large-area functional periodic structures for antireflection, self-cleaning, and superhydrophobicity based on our past and current research. For the common cases, four-beam interference and multi-exposure of two-beam interference were emphasized for their setup, structure diversity, and various applications for antireflection, self-cleaning, and superhydrophobicity. The relations between multi-beam interference and multi-exposure of two-beam interference were compared theoretically and experimentally. Nanostructures as a template for growing nanocrystals were also shown to present future possible applications in surface chemical control. Perspectives on future directions and applications for laser interference were presented.

关键词： laser interference four-beam interference multi-exposure of two-beam interference additive fabrication

Etching-assisted femtosecond laser microfabrication

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Chinese Physics B 2018年第9期27卷 56-62页

作者： Monan Liu Mu-Tian Li Han Yang hong-bo sun Department of Condensed Matter College of PhysicsJilin UniversityChangchun 130012China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Although femtosecond laser microfabrication is one of the most promising three-dimensional（3D） fabrication techniques, it could suffer from low fabrication efficiency for structures with high 3D complexities. By using etching as a main assistant technique, the processing can be speeded up and an improved structure surface quality can be provided. However,the assistance of a single technique cannot satisfy the increasing demands of fabrication and integration of highly functional 3D microstructures. Therefore, a multi-technique-based 3D microfabrication method is required. In this paper, we briefly review the recent development on etching-assisted femtosecond laser microfabrication（EAFLM）. Various processing approaches have been proposed to further strengthen the flexibilities of the EAFLM. With the use of the multi-technique-based microfabrication method, 3D microstructure arrays can be rapidly defined on planar or curved surfaces with high structure qualities.

关键词： femtosecond laser microfabrication microlens array etching

Photoswitchable quantum electrodynamics in a hybrid plasmonic quantum emitter

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Chip 2023年第3期2卷 67-74页

作者： Yuan Liu hongwei Zhou Peng Xue Linhan Lin hong-bo sun State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China Beijing Computational Science Research Center Beijing 100084China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

The design and preparation of quantum states free from environmen-tal decohering effects is critically important for the development of on-chip quantum systems with *** promising strategy is to harness quantum state superposition to construct decoherence-free subspace(DFS),which is termed dark ***,the exci-tation of dark states relies on anti-phase-matching on two qubits and the inter-qubit distance is of wavelength scale,which limits the de-velopment of compact quantum *** the current work,a hybrid plasmonic quantum emitter was proposed,which was composed of strongly correlated quantum emitters intermediated by a plasmonic *** turning the plasmonic loss from drawback into advantage,the anti-phase-matching rule was broken by rapidly de-caying the superposed bright state and preparing a sub-100 nm dark state with decay rate reduced by 3 orders of *** inter-estingly,the dark state could be optically switched to a single-photon emitter with enhanced brightness through photon-blockade,with the quantum second order correlation function at zero delay showing a wide range of tunability down to 0.02.

关键词： Decoherence-free subspace Plasmonics Quantum emitter On-chip quantum systems

The mystical interlinks:Mechanics,religion or optics?

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Science China(Physics,Mechanics & Astronomy) 2016年第1期59卷 104-104页

作者： hong-bo sun State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University

The beauty of this world relies on a fact that there is always this or that mystical interlink among different fields, one concept in a specific realm shines out with great brilliancy in another totally different territory. Catenary is the curve that a free-hanging chain assumes under its own weight, which is thought to be a ＂true mathematical and mechanical form＂ in architecture. The catenary shape could also be found in the silk of a spider＇s web, but no significant phe- nomena have ever been observed in optics.

关键词：光学现象力学连锁宗教悬链线悬挂链蜘蛛网建筑

Miniaturising artificial compound eyes based on advanced micronanofabrication techniques

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Light(Advanced Manufacturing) 2021年第1期2卷 76-92页

作者： Lin Zhu Yong-Lai Zhang hong-bo sun State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University130012 ChangchunChina State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua University100084 BeijingChina

Compound eyes(CEs)are advanced optical visual systems with distinct features of large view-fields,infinite depth of field,and dynamic imaging capability,revealing their significant potential in applications including robot vision,unmanned aerial vehicle detection,and medical *** with macroscopic CEs,which primarily comprise multicamera arrays,compact integrated CEs have garnered significant attention because of their portability and possibility of flexible integration with microrobots and in-vivo medical *** date,considerable effort has been devoted to this field,in which manufacturing technologies are vital to the development of artificial CEs(ACEs)capable of large field-of-view imaging,depth information collection,and threedimensional *** and opportunities exist for the practical application of advanced *** paper reviews state-of-the-art technologies for manufacturing ACEs,and then briefly summarises their potential applications in different ***,the current challenges and perspectives of ACEs are discussed.

关键词： artificial devoted robot

O-FIB:far-field-induced near-field breakdown for direct nanowriting in an atmospheric environment

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Light(Science & Applications) 2020年第1期9卷 1624-1630页

作者： Zhen-Ze Li Lei Wang Hua Fan Yan-Hao Yu Qi-Dai Chen Saulius Juodkazis hong-bo sun State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Nanotechnology Facility Swinburne University of TechnologyJohn St.Hawthorn 3122 VicAustralia State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

Nanoscale surface texturing,drilling,cutting,and spatial sculpturing,which are essential for applications,including thin-film solar cells,photonic chips,antireflection,wettability,and friction drag reduction,require not only high accuracy in material processing,but also the capability of manufacturing in an atmospheric *** used focused ion beam(FIB)technology offers nanoscale precision,but is limited by the vacuum-working conditions;therefore,it is not applicable to industrial-scale samples such as ship hulls or biomaterials,e.g.,cells and ***,we report an optical far-field-induced near-field breakdown(O-FIB)approach as an optical version of the conventional FIB technique,which allows direct nanowriting in *** writing is initiated from nanoholes created by femtosecondlaser-induced multiphoton absorption,and its cutting“knife edge”is sharpened by the far-field-regulated enhancement of the optical near field.A spatial resolution of less than 20 nm(λ/40,withλbeing the light wavelength)is readily achieved.O-FIB is empowered by the utilization of simple polarization control of the incident light to steer the nanogroove writing along the designed *** universality of near-field enhancement and localization makes O-FIB applicable to various materials,and enables a large-area printing mode that is superior to conventional FIB processing.

关键词： field printing friction

Programmable deformation of patterned bimorph actuator swarm

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National Science Review 2020年第4期7卷 775-785页

作者： Jia-Nan Ma Yong-Lai Zhang Dong-Dong Han Jiang-Wei Mao Zhao-Di Chen hong-bo sun State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Tsinghua University

Graphene-based actuators featuring fast and reversible deformation under various external stimuli are promising for soft robotics. However, these bimorph actuators are incapable of complex and programmable3 D deformation, which limits their practical application. Here, inspired from the collective coupling and coordination of living cells, we fabricated a moisture-responsive graphene actuator swarm that has programmable shape-changing capability by programming the SU-8 patterns underneath. To get better control over the deformation, we fabricated SU-8 micropattern arrays with specific geometries and orientations on a continuous graphene oxide film, forming a swarm of bimorph actuators. In this way,predictable and complex deformations, including bending, twisting, coiling, asymmetric bending, 3 D folding, and combinations of these, have been achieved due to the collective coupling and coordination of the actuator swarm. This work proposes a new way to program the deformation of bilayer actuators,expanding the capabilities of existing bimorph actuators for applications in various smart devices.

关键词： graphene oxide actuators moisture responsive predictable deformation soft robots

Theoretical Studies on Structures and Properties of Endohedral Fullerenes Complexes: XH_n@C_(32)(X=F, O, N, C; n=1―4)

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Chemical Research in Chinese Universities 2008年第2期24卷 220-222页

作者： CHANG Ying-fei hong bo sun Li-li TANG Shu-wei WANG Rong-shun Institute of Functional Material Chemistry Faculty of Chemistry Northeast Normal University Changchun 130024 P R. China

Theoretical studies on structures and properties of endohedral fullerene complexes formed by encapsulating small molecules of HF, H20, NH3, and CH4 in a C32 fullerene cage, were carried out by ab initio method. Current calculations reveal that these processes to encase them in fullerene are energetically unfavorable because of the small cavity size of C32. The red shift in the F-H stretching frequency indicates the potential existence of hydrogen bonding between the HF molecule and the carbon cage.

关键词： Endohedral fullerene C32 Ab initio Stretching frequency Hydrogen bonding

Femtosecond laser fabrication of 3D templates for mass production of artificial compound eyes

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Nanotechnology and Precision Engineering 2019年第3期2卷 110-117页

作者： Guang-Xin Jin Xin-Yu Hu Zhuo-Chen Ma Chun-He Li Yong-Lai Zhang hong-bo sun State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China State Key Laboratory of Precision Measurement Technology&Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

Compound eyes are unique optical imaging systems that consist of numerous separate light-sensitive units(ommatidia).Attempts have been made to produce artificial compound eyes via advanced 3 D *** them,femtosecond laser direct writing(FsLDW)technology has emerged as an effective strategy due to its distinct advantages in 3 D designable and high precision fabrication ***,the point-by-point scanning process results in a very low fabrication efficiency,limiting the practical applications of the FsLDW *** solve this problem,we propose a high-efficiency method for the mass production of 3 D artificial compound eyes using a photopolymer template fabricated by *** resultant 3 D SU-8 compound eye templates could be used to replicate polydimethylsiloxane(PDMS)compound eyes many times(over 50 times)with a highly improved efficiency(nearly 20 times higher than the efficiency of direct fabrication using the point-by-point FsLDW).The PDMS replicas showed good focusing and imaging *** anticipate that this method may serve as an enabler for the mass production of 3 D artificial compound eyes and promote their practical applications in the near future.

关键词： Compound eyes Two-photon polymerization Femtosecond laser PDMS casting