Article
Chemistry, Analytical
Alessio Meggiolaro, Sebastian Cremaschini, Davide Ferraro, Annamaria Zaltron, Mattia Carneri, Matteo Pierno, Cinzia Sada, Giampaolo Mistura
Summary: The actuation of droplets on a surface is crucial for microfluidic applications. One promising solution is to use iron-doped lithium niobate crystals to generate an evanescent electric field that controls the motion of water droplets. This study presents an experimental method to determine the attractive force exerted by the evanescent field and demonstrates the importance of these measurements for the design and characterization of optofluidic devices based on lithium niobate crystals.
Article
Chemistry, Multidisciplinary
Annamaria Zaltron, Davide Ferraro, Alessio Meggiolaro, Sebastian Cremaschini, Mattia Carneri, Enrico Chiarello, Paolo Sartori, Matteo Pierno, Cinzia Sada, Giampaolo Mistura
Summary: This article presents an optofluidic platform for the actuation and control of liquid droplets. The platform uses iron-doped lithium niobate crystals and a lubricant-infused layer to easily manipulate droplets. It is highly flexible and reconfigurable, without the need for moving parts.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Crystallography
Fabrizio Ciciulla, Annamaria Zaltron, Riccardo Zamboni, Cinzia Sada, Francesco Simoni, Victor Yu Reshetnyak, Liana Lucchetti
Summary: The study proposes a new configuration of the optofluidic platform utilizing liquid crystals reorientation in lithium niobate channels. By designing microchannels and performing simulations and experiments, thresholdless reorientation conditions were achieved and additional photo-induced fields were observed above a certain light intensity.
Article
Chemistry, Multidisciplinary
Zuoxuan Gao, Jinghui Yan, Lihong Shi, Xiaohu Liu, Mengtong Wang, Chenyu Li, Zechao Huai, Cheng Wang, Xuan Wang, Lina Zhang, Wenbo Yan
Summary: This study proposes a surfactant-mediated photovoltaic manipulation method for stable and fast manipulation of femtoliter-scale aqueous microdroplets. By adjusting the intensity and position of laser illumination, the merging, touching, and detaching of microdroplets can be controlled. The study also demonstrates cascading biochemical operations and microreactions of microdroplets, as well as in-situ adjustment of droplet size and fluorescent solute.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Analytical
Yuchen Zhu, Minmin You, Yuzhi Shi, Haiyang Huang, Zeyong Wei, Tao He, Sha Xiong, Zhanshan Wang, Xinbin Cheng
Summary: Optical tweezers (OTs) are capable of manipulating particles precisely through the transfer of light momentum. They have enabled exploration in nonlinear optics, soft-condensed-matter physics, molecular biology, and analytical chemistry due to their non-contact and precise control properties. The combination of OTs with microfluidic chips has led to the development of optofluidic tweezers, overcoming limitations in speed and efficiency. This paper provides an overview of static OTs and recent advancements in optofluidic tweezers, including capture, manipulation, sorting, and measurement using different technologies. It also highlights the trend of combining optofluidic tweezers with other techniques for greater functionality, and concludes by summarizing the main challenges and future directions in this research field.
Article
Optics
Jason F. Herrmann, Vahid Ansari, Jiahui Wang, Jeremy D. Witmer, Shanhui Fan, Amir H. Safavi-Naeini
Summary: Researchers have demonstrated an integrated mirror-symmetric non-reciprocal device enabled by three coupled photonic resonators, achieving nearly 40 dB of isolation at telecommunications wavelengths. This device simplifies the fabrication and operation of non-reciprocal integrated devices and can be applied for full-duplex isolation within a single waveguide.
Article
Optics
Yuzhi Shi, Yongfeng Wu, Lip Ket Chin, Zhenyu Li, Jingquan Liu, Mu Ku Chen, Shubo Wang, Yi Zhang, Patricia Yang Liu, Xiaohong Zhou, Hong Cai, Wanzhen Jin, Yefeng Yu, Ruozhen Yu, Wei Huang, Peng Huat Yap, Limin Xiao, Wee Ser, Thi Thanh Binh Nguyen, Yu-Tsung Lin, Pin Chieh Wu, Jiayan Liao, Fan Wang, C. T. Chan, Yuri Kivshar, Din Ping Tsai, Ai Qun Liu
Summary: This study demonstrates a multifunctional virus manipulation technique that enables efficient trapping and manipulation of arbitrary number of viruses. Enhanced optical forces are produced by fine tuning of interference resonances in engineered arrays of nanocavities, allowing trapping and manipulation of viruses as small as 40 nm. This technique opens up new opportunities for studying virus pathogenesis and inhibitor development.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Jitao Ji, Zhizhang Wang, Jiacheng Sun, Chen Chen, Xueyun Li, Bin Fang, Shi-Ning Zhu, Tao Li
Summary: In this study, we propose a novel method for on-chip generation and manipulation of higher-order Poincare sphere beams (HOPBs) by combining metasurface with optical waveguides on a lithium niobate on insulator platform. By using a diatomic geometric metasurface for phase modulation, guided waves are extracted into free space with high signal-to-noise ratio and formed into two orthogonal circularly polarized optical vortices which are linearly superposed into HOPBs. Additionally, a dual-port waveguide crossing is utilized to reconfigure the output states into an arbitrary point on a higher-order Poincare sphere based on in-plane interference of two guided waves. This approach provides a compact solution for generating and manipulating HOPBs and can be further enhanced by employing electro-optical modulation on a lithium niobate waveguide for full tunability.
Article
Chemistry, Multidisciplinary
Taimoor Naeem, Hafiz Saad Khaliq, Muhammad Zubair, Tauseef Tauqeer, Muhammad Qasim Mehmood
Summary: The ultrafast modulation of the refractive index through either linear or nonlinear electro-optic effects is widely used in tunable photonic circuits. Silicon, a mature material for on-chip devices, lacks a strong electro-optic Pockels effect. The proposed electrically tunable meta-device utilizes the Pockels effect to tune resonance wavelength and focal length, showing potential applications in machine vision, broadband microscopy, and spectroscopy.
Correction
Optics
Juanjuan Lu, Ayed Al Sayem, Zheng Gong, Joshua B. Surya, Chang-Ling Zou, Hong X. Tang
Summary: This erratum corrects a typographic error that appeared in Table 1 of our previous paper.
Article
Optics
Renato Domeneguetti, Michael Stefszky, Harald Herrmann, Christine Silberhorn, Ulrik L. Andersen, Jonas S. Neergaard-Nielsen, Tobias Gehring
Summary: This study presents a guided setup for single-mode squeezing on integrated titanium-indiffused periodically poled nonlinear resonators. By using single-mode fibers, a continuous-wave laser beam is delivered and the squeezed field is collected, with up to -3.17(9) dB of useful squeezing available in fibers. The generated squeezed light was applied in a fiber-based phase sensing experiment, showing a quantum enhancement in the signal-to-noise ratio of 0.35 dB. The investigation also reveals that photorefraction can cause system instabilities at high powers.
Article
Optics
Baolong Zhang, Xiaojun Wu, Xuan Wang, Shangqing Li, Jinglong Ma, Guoqian Liao, Yutong Li, Jie Zhang
Summary: The addition of an echelon into a single-cycle THz source based on optical rectification allows for efficient generation of multicycle THz pulses. This method offers high efficiency, ease of operation, and the ability to quickly switch between working modes.
Article
Nanoscience & Nanotechnology
Yuhang Mi, Xiaohu Liu, Zuoxuan Gao, Mengtong Wang, Lihong Shi, Xiong Zhang, Kaifang Gao, Euphrem Rwagasore Mugisha, Wenbo Yan
Summary: This study introduces a three-dimensional photovoltaic water-microdroplet router based on a superhydrophobic crystal, which utilizes the repulsive electrostatic force generated by positive photovoltaic charges to route microdroplets in both in-plane and out-of-plane ways. Experimental results show that microdroplets gain positive charges on a superhydrophobic surface and are routed inside the 2D substrate plane or jump out of the plane through electrostatic ballistic ejection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Mengtong Wang, Zuoxuan Gao, Xiaohu Liu, Lihong Shi, Yuhang Mi, Kaifang Gao, Xiong Zhang, Wenbo Yan
Summary: This study demonstrates a photovoltaic actuation method for driving aqueous microdroplets, utilizing the repulsive response and nonlocal feature. The research reveals the roles of electrostatic force and repulsive force induced by compressed convection flow of infused oil in achieving this nonlocal feature, and explores the threshold effect of laser illumination intensity on the actuation velocity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
A. R. Zanatta
Summary: This study presents a thorough investigation of the Egap of the congruent ferroelectric LiNbO3 (Z-cut) single crystal at room-temperature and in the temperature range of approximately 80-800 K.
RESULTS IN PHYSICS
(2022)
Article
Optics
Xiong Zhang, Kaifang Gao, Zuoxuan Gao, Zhitao Zan, Lihong Shi, Xiaohu Liu, Mengtong Wang, Hongjian Chen, Wenbo Yan
Article
Optics
Zuoxuan Gao, Yuhang Mi, Mengtong Wang, Xiaohu Liu, Xiong Zhang, Kaifang Gao, Lihong Shi, E. R. Mugisha, Hongjian Chen, Wenbo Yan
Summary: The research focuses on the development of photovoltaic water-microdroplet manipulation using LN:Fe crystals, demonstrating successful manipulation on a hydrophobic substrate. The study shows that the maximum manipulation distance is dependent on laser-illumination intensity, and increasing intensity can enhance the photovoltaic interaction and velocity of manipulated microdroplets.
Article
Nanoscience & Nanotechnology
Yuhang Mi, Xiaohu Liu, Zuoxuan Gao, Mengtong Wang, Lihong Shi, Xiong Zhang, Kaifang Gao, Euphrem Rwagasore Mugisha, Wenbo Yan
Summary: This study introduces a three-dimensional photovoltaic water-microdroplet router based on a superhydrophobic crystal, which utilizes the repulsive electrostatic force generated by positive photovoltaic charges to route microdroplets in both in-plane and out-of-plane ways. Experimental results show that microdroplets gain positive charges on a superhydrophobic surface and are routed inside the 2D substrate plane or jump out of the plane through electrostatic ballistic ejection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Mengtong Wang, Zuoxuan Gao, Xiaohu Liu, Lihong Shi, Yuhang Mi, Kaifang Gao, Xiong Zhang, Wenbo Yan
Summary: This study demonstrates a photovoltaic actuation method for driving aqueous microdroplets, utilizing the repulsive response and nonlocal feature. The research reveals the roles of electrostatic force and repulsive force induced by compressed convection flow of infused oil in achieving this nonlocal feature, and explores the threshold effect of laser illumination intensity on the actuation velocity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Zuoxuan Gao, Jinghui Yan, Lihong Shi, Xiaohu Liu, Mengtong Wang, Chenyu Li, Zechao Huai, Cheng Wang, Xuan Wang, Lina Zhang, Wenbo Yan
Summary: This study proposes a surfactant-mediated photovoltaic manipulation method for stable and fast manipulation of femtoliter-scale aqueous microdroplets. By adjusting the intensity and position of laser illumination, the merging, touching, and detaching of microdroplets can be controlled. The study also demonstrates cascading biochemical operations and microreactions of microdroplets, as well as in-situ adjustment of droplet size and fluorescent solute.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xiaohu Liu, Zuoxuan Gao, Chao Liang, Lihong Shi, Xueyong Cao, Mengtong Wang, Zechao Huai, Wenbo Yan
Summary: LiNbO3-based photovoltaic jetting can produce dielectric microdroplets with volume down to fL, which has great potential in producing whispering-gallery-mode (WGM) microresonators. This study investigates the microdroplet interface evolution caused by laser beam illumination and demonstrates the confinement of photovoltaic charges on LiNbO3:Fe surface, resulting in directional jetting of the dielectric liquid. All-optical, in-situ printing of WGM microdroplets onto substrates is achieved, and the printed microdroplets show dependence on size, shape, and contact angles for applications in anti-counterfeiting and sensing.
APPLIED SURFACE SCIENCE
(2023)