Article
Nanoscience & Nanotechnology
Melissa J. Goodwin, Cornelis A. M. Harteveld, Meint J. de Boer, Willem L. Vos
Summary: Periodic arrays of deep nanopores in silicon are important for silicon nanophotonics. Previous studies focused on achieving deep nanopores with high aspect ratios, but resulted in structural imperfections. This study aims to realize cylindrical nanopores for better comparison with theory and simulations. By optimizing etching parameters and implementing a multistep process, cylindrical nanopores with high aspect ratios were achieved, suitable for silicon nanophotonic structures.
Article
Chemistry, Physical
Doo San Kim, Yun Jong Jang, Ye Eun Kim, Hong Seong Gil, Hee Ju Kim, You Jin Ji, Hyung Yong Kim, In Ho Kim, Myoung Kwan Chae, Jong Chul Park, Geun Young Yeom
Summary: In this study, a dual exhaust system was implemented in a reactive ion beam etcher (RIBE) to control the radical flux relative to ion flux during the etching process. The additional exhausting of radicals through the inductively coupled plasma (ICP) source chamber decreased both the ICP source chamber pressure and the ratio of radical flux to ion flux. This control of the radical flux is believed to be beneficial for anisotropic etching of nanoscale features in the next generation RIBE.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Xinyi Cao, Yibo Xiao, Qiao Dong, Shaobo Zhang, Junzhuan Wang, Lianhui Wang, Li Gao
Summary: This study reports a low-cost and large-area fabrication method for metasurfaces through a combination of soft nanoimprint lithography and reactive ion etching. The size of meta-atoms can be tuned by controlling the etching condition carefully and implementing an iterative imprint and etch process. This approach is effective for wafer-scale nanophotonics, allowing for alteration of metasurface resonances and replication of new structures with minimum cost.
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Hande Ozcan, Daniel Salas, Ji Ma, Yang Ren, Yuriy I. Chumlyakov, Ibrahim Karaman
Summary: Single crystalline materials can exhibit superior performance due to the absence of grain boundaries, but controlling the crystallographic orientation is crucial for their applications. This study presents a new crystal reorientation mechanism that allows abrupt and massive orientation changes in bulk single crystalline and oligocrystalline alloys through solid state thermal processing. The findings provide a new strategy for manipulating the orientation of large single crystals to utilize their superior and highly anisotropic properties.
Article
Geochemistry & Geophysics
Valeri Sonin, Egor Zhimulev, Aleksei Chepurov, Ivan Gryaznov, Anatoly Chepurov, Valentin Afanasiev, Nikolai Pokhilenko
Summary: Diamond etching experiments conducted under high-temperature ambient-pressure conditions provide insights into the microstructures on diamond faces after impact events, suggesting natural oxidation and surface graphitization processes on diamond crystals in impact craters. Implications include potential for natural etching of diamonds in silicate melts and different oxidation rates for impact diamonds near the surface versus within the melt.
Article
Chemistry, Multidisciplinary
Shunsuke Kobayashi, Daisaku Yokoe, Yasuyuki Fujiwara, Kazuaki Kawahara, Yuichi Ikuhara, Akihide Kuwabara
Summary: Lithium lanthanum titanate La2/3-xLi3xTiO3 (LLTO) has the potential to exhibit the highest Li-ion conductivity among oxide-based electrolytes, providing important insights into their crystal structures for higher conductivity in novel oxide-based electrolyte design.
Article
Chemistry, Physical
Xiaopei Zhu, Lina Cheng, Han Yu, Feifei Xu, Wei Wei, Li-Zhen Fan
Summary: This study systematically investigates the relationship between microstructural characteristics and rate performance in a pouch cell with LiNi0.5Mn0.3Co0.2O2/artificial graphite lithium ion battery. The research reveals that the (001) plane microtexture of the electrode surface structure significantly affects the rate capability, leading to diffusion resistance of lithium ions and high interfacial resistance. These findings offer guidance for developing lithium batteries with high rate and long cycle life.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Multidisciplinary
Lukasz Baran, Dariusz Tarasewicz, Daniel M. M. Kaminski, Wojciech Rzysko
Summary: Selective fabrication of cubic diamond is achieved in a one-component system by applying an external field and manipulating its strength. The formation is driven by the commensurate structure of the first adlayer with the (110) face of cubic diamond. The structure remains stable even after the external field is turned off, allowing for further post-synthetic treatment.
Article
Chemistry, Multidisciplinary
Philipp Taus, Adrian Prinz, Heinz D. Wanzenboeck, Patrick Schuller, Anton Tsenov, Markus Schinnerl, Mostafa M. Shawrav, Michael Haslinger, Michael Muehlberger
Summary: This study demonstrates different approaches for generating sophisticated undercut T-shaped masters suitable for nanoimprint lithography, successfully fabricating single-layer and multilayer undercut T-shaped structures, which can be applied to replicate structural colors on artificial surfaces in the future.
Article
Chemistry, Multidisciplinary
Rajadurai Chandrasekar
Summary: The emergence of molecular crystals as smart nanophotonic components has attracted the attention of scientists, with the development of mechanically flexible crystals requiring challenging micromanipulation methods. The rise of atomic force microscopy has expanded the scope of mechanophotonics and led to the advancement of crystal-based microscale organic photonic integrated circuits. The ability of OPICs to guide, split, couple, and modulate visible electromagnetic radiation using various mechanisms is discussed, with examples from recent literature.
Article
Nanoscience & Nanotechnology
Seunghwan Lee, Hye-Mi Kim, GeonHo Baek, Jin-Seong Park
Summary: In the field of semiconductor production, as the technology node of devices becomes smaller, area selective deposition (ASD) has become a promising technique for addressing overlay or self-alignment issues. Utilizing molecular layer deposition (MLD) for conformal deposition in ASD can effectively address the limitations of traditional materials and processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Optics
Guo-Jing Tang, Xin-Tao He, Fu-Long Shi, Jian-Wei Liu, Xiao-Dong Chen, Jian-Wen Dong
Summary: Recent research in topological photonics has made significant progress in proposing and realizing novel topological phenomena, designing and fabricating high-performance photonic devices. Photonic crystals, as a powerful platform for controlling the flow of light, have been widely used to reveal different topological phases of light and demonstrate topological photonic functionalities. Furthermore, topological photonic crystals have found applications in both passive and active photonics.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Physical
Valeria Lotito, Tomaso Zambelli
Summary: Monolayers of self-assembled quasi-spherical colloidal particles are crucial in materials science and engineering. They serve as templates for nanostructure fabrication or are incorporated in final structures for their intrinsic properties. Various methods have been developed to modify the size and shape of colloidal particles, with dry etching being a widely used technique. Such particles can be utilized for patterning or suspended in solvents for diverse applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Andrei Kozlov, Dmitrii Moskalev, Uliana Salgaeva, Anna Bulatova, Victor Krishtop, Anatolii Volyntsev, Alexander Syuy
Summary: In this study, a technology was developed for producing ridge waveguides with minimal roughness of sidewalls and material surface, aiming to fabricate miniature photonic integrated circuits on a LiNbO3 substrate. Plasma etching processes were used in the fabrication of ridge waveguides on different material substrates. The process conditions for producing ridge waveguides with minimal sidewall roughness were determined by the specifications of equipment, plasma source, mask fabrication method, and substrate material. Experimental work identified the narrow ranges of technological parameters suitable for producing ridge waveguides on LiNbO3 with smooth sidewalls and minimal defects in the near-waveguide region. Additionally, a model proposing the kinetics of the etching process of LiNbO3 in SF6/Ar plasma as a physical-chemical process was proposed.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Angela M. Baracu, Christopher A. Dirdal, Andrei M. Avram, Adrian Dinescu, Raluca Muller, Geir Uri Jensen, Paul Conrad Vaagen Thrane, Hallvard Angelskar
Summary: Metasurfaces have gained significant attention for their potential to create high-performance flat, ultrathin optical devices. Research has shown that the cryogenic and Bosch etching methods can achieve efficiencies of around 39% for silicon metalenses, despite acceptable levels of sidewall surface roughness from the Bosch DRIE process. Further process modifications are recommended to improve efficiencies in metalens fabrication.
Article
Multidisciplinary Sciences
Chunhui Du, Toeno van der Sar, Tony X. Zhou, Pramey Upadhyaya, Francesco Casola, Huiliang Zhang, Mehmet C. Onbasli, Caroline A. Ross, Ronald L. Walsworth, Yaroslav Tserkovnyak, Amir Yacoby
Article
Multidisciplinary Sciences
Y. Dovzhenko, F. Casola, S. Schlotter, T. X. Zhou, F. Buttner, R. L. Walsworth, G. S. D. Beach, A. Yacoby
NATURE COMMUNICATIONS
(2018)
Article
Multidisciplinary Sciences
Mark J. H. Ku, Tony X. Zhou, Qing Li, Young J. Shin, Jing K. Shi, Claire Burch, Laurel E. Anderson, Andrew T. Pierce, Yonglong Xie, Assaf Hamo, Uri Vool, Huiliang Zhang, Francesco Casola, Takashi Taniguchi, Kenji Watanabe, Michael M. Fogler, Philip Kim, Amir Yacoby, Ronald L. Walsworth
Article
Physics, Multidisciplinary
Uri Vool, Assaf Hamo, Georgios Varnavides, Yaxian Wang, Tony X. Zhou, Nitesh Kumar, Yuliya Dovzhenko, Ziwei Qiu, Christina A. C. Garcia, Andrew T. Pierce, Johannes Gooth, Polina Anikeeva, Claudia Felser, Prineha Narang, Amir Yacoby
Summary: In this study, current flow in the layered semimetal tungsten ditelluride was investigated by imaging the local magnetic field, revealing non-uniform current density indicative of hydrodynamic flow, with the strongest effects observed around 20 K. Ab initio calculations suggest that electron-electron interactions are predominantly mediated by phonons rather than solely the Coulomb interaction, offering a promising avenue for the search for hydrodynamic flow and prominent electron interactions in high-carrier-density materials.
Article
Multidisciplinary Sciences
Tony X. Zhou, Joris J. Carmiggelt, Lisa M. Gachter, Ilya Esterlis, Dries Sels, Rainer J. Stohr, Chunhui Du, Daniel Fernandez, Joaquin F. Rodriguez-Nieva, Felix Buttner, Eugene Demler, Amir Yacoby
Summary: Scattering experiments play a crucial role in studying magnetic properties of materials. By generating magnonic excitations and recording scattered waves, spatial information about the scattering potential of the target can be obtained.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Applied
Xiaofu Zhang, Ilya Charaev, Huanlong Liu, Tony X. Zhou, Dong Zhu, Karl K. Berggren, Andreas Schilling
Summary: The study found that the critical temperature of Mo (x) Si1-x films gradually increases with the Mo stoichiometry, and thin Mo(0.83)Si(0.17) films exhibit robust superconductivity even with a thickness of approximately 2 nm. Thick films of Mo0.83Si0.17, on the other hand, show surprising degradation with the onset of zero-resistivity being suppressed below 2 K.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Adam Khalifa, Mohsen Zaeimbashi, Tony X. Zhou, Seyed Mahdi Abrishami, Neville Sun, Seunghyun Park, Tamara Sumarac, Jason Qu, Inbar Zohar, Amir Yacoby, Sydney Cash, Nian X. Sun
Summary: A novel microfabricated solenoid inductor with a magnetic core has been demonstrated for activating neuronal tissue, overcoming the limitations of electrode encapsulation by gliosis. This technology may prove to be an effective alternative to existing electrode-based stimulation devices for treating neurological disorders.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Physics, Multidisciplinary
Jesse Liu, Kristin Dona, Gabe Hoshino, Stefan Knirck, Noah Kurinsky, Matthew Malaker, David W. Miller, Andrew Sonnenschein, Mohamed H. Awida, Peter S. Barry, Karl K. Berggren, Daniel Bowring, Gianpaolo Carosi, Clarence Chang, Aaron Chou, Rakshya Khatiwada, Samantha Lewis, Juliang Li, Sae Woo Nam, Omid Noroozian, Tony X. Zhou
Summary: We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program, which plans to search for bosonic dark matter. BREAD proposes a cylindrical metal barrel to convert dark matter into photons and focuses them onto a photosensor using a novel parabolic reflector design. By conducting a pilot 0.7 m(2) barrel experiment, BREAD is expected to surpass existing dark photon coupling constraints and improve sensitivity.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Ziwei Qiu, Assaf Hamo, Uri Vool, Tony X. Zhou, Amir Yacoby
Summary: This study demonstrates a novel method for imaging electric fields using NV centers in diamond, which can image both AC and DC electric fields under ambient conditions and overcome the screening effect by mechanical oscillation. The method shows excellent sensitivity and resolution in detecting AC and DC electric fields, and is of great significance for building a multimodal quantum sensing platform.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Applied
Tony X. Zhou, Rainer J. Stoehr, Amir Yacoby
APPLIED PHYSICS LETTERS
(2017)