Article
Chemistry, Multidisciplinary
Genwang Wang, Ye Ding, Haotian Long, Yanchao Guan, Xiwen Lu, Yang Wang, Lijun Yang
Summary: This paper reports on the simulations of electric and force fields at the tips of metallic probes irradiated by polarized laser output from a scanning near-field optical microscope probe. The results demonstrate that polarized laser can induce nanoscale evanescent fields with high intensity, which effectively move nanoparticles. The paper also discusses schemes with dual probes, showing that different combinations of metallic probes and polarized lasers provide diverse near-field and corresponding optical force.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
Mohammad Asif Zaman, Wei Ren, Mo Wu, Punnag Padhy, Lambertus Hesselink
Summary: The plasmonic response of a nano C-aperture is analyzed using the Vector Field Topology (VFT) visualization technique. The induced electrical currents on the metal surfaces and the topology of the current density vector are calculated and analyzed. A distinct shift in the topology is found to coincide with the plasmonic resonance condition, leading to increased current circulation. Numerical results support the claims and suggest that VFT is a powerful tool for studying nano-photonic structures.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Jatin Abacousnac, David G. Grier
Summary: This paper introduces a dark trap created by superimposing Gaussian modes with different waist diameters, which is used to manipulate light-seeking and dark-seeking particles in the same system. The interference-based difference-of-Gaussians (DoG) trap can rigidly capture dark-seeking particles in three dimensions.
Article
Materials Science, Multidisciplinary
Yarong Yu, Dan Wu, Yuanhao Lou, Jiayao Dong, Qiuhong Min, Jian Ma, Bei Wu, Hongyuan Zhang, Yirui Wang, Hongwu Tang, Yuanjie Pang
Summary: Stable optical trapping and in situ excitation of highly bright photoluminescence of a single up-conversion nanoparticle (UCNP) were successfully demonstrated. A quad-nanohole structure with two bright-field modes for enhanced excitation and emission of the UCNP, as well as a dark-field mode for enhanced optical trapping, was designed. Experimental results showed that the photoluminescence of the UCNP optically trapped in the quad-nanohole was enhanced by a factor of 87 (compared to a UCNP trapped in the single nanohole), surpassing the enhancement factor from a bowtie nanohole-one of the gold standards for local field enhancement. This work provides a route to assemble super-bright single-emitter luminescence by optical trapping.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Xiaohao Xu, Yi Yang, Lixiang Chen, Xixi Chen, Tianli Wu, Yuchao Li, Xiaoshuai Liu, Yao Zhang, Baojun Li
Summary: The study presents a unique optical manipulation phenomenon in light-matter interactions, where the dynamic response of particles to an optical trap can be diametrically opposed. The phenomenon, modulated by particle dimensions, can be utilized for particle size selection.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Yuan Zhou, Yanan Zhang, Wenyu Gao, Shaohui Yan, Manman Li, Xing Li, Ping Wang, Baoli Yao
Summary: This paper reports on the optical rotation of metallic microparticles using an optimal radially polarized perfect optical vortex (RPPOV). The RPPOV's polarization structure leads to a double-ring intensity pattern, and the metallic microparticles immersed in this vortex experience a non-zero azimuthal force, resulting in simultaneous rotation at two orbits with different radii. The rotation radius and velocity can be separately controlled by changing the parameters of the RPPOV.
Article
Chemistry, Physical
Mamoru Tamura, Takudo Wada, Hajime Ishihara
Summary: Light possesses momentum and can exert force on materials through absorption and/or scattering. Optical force techniques, such as trapping and transporting small particles, have been receiving significant attention. This article provides a summary of the basics of optical forces and presents simplified expressions for analyzing different types of forces in various light and matter systems. The applications of optical force techniques in fields such as molecular bioscience and materials engineering are discussed.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS
(2023)
Article
Optics
Zong-Sian Li, Tsan-Wen Lu, Pin-Ruei Huang, Po-Tsung Lee
Summary: We propose and study a plasmonic bowtie notch design with assisted periodic curved grooves to reduce power consumption in experiments and stably trap polystyrene spheres, which can be helpful in realizing highly efficient nano-tweezers in the plasmonic circuit on-chip.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Shang-Jie Yu, Helen Yao, Guangwei Hu, Yue Jiang, Xiaolin Zheng, Shanhui Fan, Tony F. Heinz, Jonathan A. Fan
Summary: This study presents hyperbolic polaritonic rulers based on low-dimensional, strongly anisotropic nanomaterials, which exhibit near-field polaritonic characteristics that are highly sensitive to device geometry. Using scanning near-field optical microscopy, the researchers demonstrate the strongly confined image polariton modes supported by these rulers and describe and predict their behavior using a simple analytic model.
Article
Chemistry, Physical
Hongru Ding, Pavana Siddhartha Kollipara, Linhan Lin, Yuebing Zheng
Summary: Optothermal tweezers, with superior manipulation capability at low optical intensity, are limited by implicit understanding of the working mechanism. By revealing the atomistic view of opto-thermo-electro-mechanic coupling, we have developed high-performance tweezers using low-concentrated electrolytes and demonstrated their efficiency in separating colloidal particles based on surface charge differences.
Article
Optics
Mohsen Samadi, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: This study introduces a hybrid gold-graphene plasmonic tweezers that efficiently manipulates micrometer particles by varying the trap stiffness of the graphene layer. The graphene layer absorbs the plasmonic field around gold nanostructures at specific chemical potentials, allowing modulation of plasmonic force components and trapping potential, leading to more efficient heat transfer.
News Item
Optics
Xiaohe Zhang, Bing Gu, Cheng-Wei Qiu
Summary: Researchers have proposed a new method that can measure the weak force of a single microscopic particle.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Chemistry, Physical
Daniel Nuerenberg, Andrew G. G. Mark, Peer Fischer, Helmut Zacharias
Summary: We investigate the electron emission from 3D chiral silver alloy nanohelices initiated by femtosecond laser pulses. We find hot but thermally distributed electron spectra and a strong anisotropy in the electron yield with left- and right-circularly polarized light excitations, which invert in sign between left- and right-handed helices. Measurements of the reflectance and simulations of the absorbance of the helices based on retarded field calculations are compared to the anisotropy in photoemission.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Thang Minh Nguyen, YongDeok Cho, Ji-Hyeok Huh, Hayun Ahn, NaYeoun Kim, Kyung Hun Rho, Jaewon Lee, Min Kwon, Sung Hun Park, ChaeEon Kim, Kwangjin Kim, Young-Seok Kim, Seungwoo Lee
Summary: Researchers developed a new type of nanomembrane as a substrate for dark-field microscopy, overcoming the optical loss and edge scattering issues associated with conventional TEM grids.
Article
Chemistry, Multidisciplinary
Thang Minh Nguyen, YongDeok Cho, Ji-Hyeok Huh, Hayun Ahn, NaYeoun Kim, Kyung Hun Rho, Jaewon Lee, Min Kwon, Sung Hun Park, ChaeEon Kim, Kwangjin Kim, Young-Seok Kim, Seungwoo Lee
Summary: This study demonstrates the use of a freely suspended ultrathin and wide-scale transparent nanomembrane as a substrate for dark-field microscopy, which addresses challenges posed by conventional TEM grids such as optically lossy carbon layer and broadband scattering from the edges.
Article
Chemistry, Multidisciplinary
Baolei Liu, Chaohao Chen, Xiangjun Di, Jiayan Liao, Shihui Wen, Qian Peter Su, Xuchen Shan, Zai-Quan Xu, Lining Arnold Ju, Chao Mi, Fan Wang, Dayong Jin
Article
Optics
Ankur Sharma, Linglong Zhang, Jonathan O. Tollerud, Miheng Dong, Yi Zhu, Robert Halbich, Tobias Vogl, Kun Liang, Hieu T. Nguyen, Fan Wang, Shilpa Sanwlani, Stuart K. Earl, Daniel Macdonald, Ping Koy Lam, Jeffrey A. Davis, Yuerui Lu
LIGHT-SCIENCE & APPLICATIONS
(2020)
Article
Multidisciplinary Sciences
Shihui Wen, Yongtao Liu, Fan Wang, Gungun Lin, Jiajia Zhou, Bingyang Shi, Yung Doug Suh, Dayong Jin
NATURE COMMUNICATIONS
(2020)
Article
Multidisciplinary Sciences
Yunfei Shang, Jiajia Zhou, Yangjian Cai, Fan Wang, Angel Fernandez-Bravo, Chunhui Yang, Lei Jiang, Dayong Jin
NATURE COMMUNICATIONS
(2020)
Article
Nanoscience & Nanotechnology
Xuchen Shan, Fan Wang, Dejiang Wang, Shihui Wen, Chaohao Chen, Xiangjun Di, Peng Nie, Jiayan Liao, Yongtao Liu, Lei Ding, Peter J. Reece, Dayong Jin
Summary: Optical tweezers are widely used in various fields, including materials assembly, characterization, biomechanical force sensing, and cell and organ manipulation. A new technology using a resonance effect to enhance the permittivity and polarizability of nanocrystals has been developed, allowing for significantly stronger optical trapping forces for low-refractive-index nanoparticles. The use of lanthanide doping shows great potential in controlling the refractive index of nanomaterials for intracellular manipulation of organelles and integration with other optical technologies.
NATURE NANOTECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Lachlan W. Russell, Eloise C. Dossetor, Alexander A. Wood, David A. Simpson, Peter J. Reece
Summary: This article investigates the requirements for high-quality optically detected magnetic resonance (ODMR) spectroscopy in a conventional gradient force optical tweezers using nanodiamonds containing nitrogen-vacancy (NV-) centers. The modulation of the infrared trapping laser during spectroscopic measurements is shown to substantially improve ODMR contrast. This technique allows for the resolution of NV- spin projections and inferring crystallographic orientation, which are essential for future magnetic sensing applications of optically trapped nanodiamonds.
Editorial Material
Optics
Andreas Pusch, Michael P. Nielsen, Muhammad H. Sazzad, Peter J. Reece, Nicholas J. Ekins-Daukes
Summary: The current-voltage characteristics presented by Zhang et al. in their recent work overestimate the achievable power using the proposed material by several orders of magnitude.
Article
Nanoscience & Nanotechnology
Ying Zhu, Peter J. Reece
Summary: This study introduces a phase-based imaging approach using differential interference contrast (DIC) as a means of label-free optical sensing with plasmonic nanohole arrays. By developing a colorimetric-based imaging readout and evaluating the refractive-index sensing capability using a layer-by-layer polyelectrolyte deposition model, the researchers cross-validate the DIC imaging approach and show good agreement among different measurements, opening up potential applications for rapid and multiplexed sensing using the phase response of nanoplasmonic structures.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Michael P. Nielsen, Andreas Pusch, Muhammad H. Sazzad, Phoebe M. Pearce, Peter J. Reece, Nicholas J. Ekins-Daukes
Summary: Thermoradiative diodes generate power through the emission of light instead of absorption, and have potential applications in night-sky power generation and waste heat recovery. This study measures the electro-optical characteristics of HgCdTe photodiodes and highlights the need for high radiative efficiencies in mid-infrared semiconductors for thermoradiative power generation.
Article
Nanoscience & Nanotechnology
Eunyoung Choi, Yurou Zhang, Arman Mahboubi Soufiani, Minwoo Lee, Richard F. Webster, Michael E. Pollard, Peter J. Reece, Wonjong Lee, Jan Seidel, Jongchul Lim, Jung-Ho Yun, Jae Sung Yun
Summary: The greater stability and excellent emission properties of low-dimensional halide perovskites make them popular candidates for optoelectronic applications. In this study, the electronic response of the edges of two-dimensional perovskites was elucidated using Kelvin Probe Force Microscopy. Sub-bandgap states were found to exist, and the behavior of charge carriers was found to depend on the edge height. A photodetector was fabricated using a millimeter-sized single crystal, and broadband photodetection response was observed.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Baolei Liu, Xuchen Shan, Jianfeng Zhu, Chaohao Chen, Yongtao Liu, Fan Wang, David McGloin
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)
(2020)
Correction
Chemistry, Multidisciplinary
Laixu Gao, Xuchen Shan, Xiaoxue Xu, Yongtao Liu, Baolei Liu, Songquan Li, Shihui Wen, Chenshuo Ma, Dayong Jin, Fan Wang
Article
Chemistry, Multidisciplinary
Shreedhar Gautam, Vinicius R. Goncales, Rafael N. P. Colombo, Wenxian Tang, Susana Cordoba de Torresi, Peter J. Reece, Richard D. Tilley, J. Justin Gooding
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Mansoor Ali Khan, Ying Zhu, Yin Yao, Pengfei Zhang, Arti Agrawal, Peter J. Reece
Article
Chemistry, Multidisciplinary
Fei Han, Thomas Armstrong, Ana Andres-Arroyo, Danielle Bennett, Alex Soeriyadi, Ali Alinezhad Chamazketi, Padmavathy Bakthavathsalam, Richard D. Tilley, J. Justin Gooding, Peter J. Reece
