Article
Chemistry, Multidisciplinary
Hailong Fu, Ke Huang, Kenji Watanabe, Takashi Taniguchi, Morteza Kayyalha, Jun Zhu
Summary: In this experiment, Fabry-Perot interferometers were constructed using a split-gate design and measurements of Aharonov-Bohm oscillations were presented. The velocity of the edge state was found to be approximately 6 x 10(4) m/s at filling factor nu = 2 and decreased with increasing filling factor. The dc bias and temperature dependence of the interference suggested electron-electron interaction induced decoherence mechanisms. These results pave the way for exploring fractional and non-Abelian braiding statistics in this promising device platform.
Article
Optics
Geunweon Lim, Jinho Lee, Junha Jung, Ju Han Lee
Summary: In this study, a fiber-optic modulation device based on Fabry-Perot interferometer (FPI) was successfully fabricated using the photo-thermal effect and high thermal conductivity of MXene V2C. The device achieved a high pump-to-phase conversion efficiency and extinction ratio, and showed good stability.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Chen Zhu, Ruimin Jie, Osamah Alsalman, Hongkun Zheng, Wassana Naku, Bo Liu, Lingmei Ma
Summary: This article presents a multi-point curvature sensor system based on optical fiber Fabry-Perot interferometric sensor devices and microwave photonics interrogation technique. The system can measure curvature at multiple points by encoding the changes in fringe contrast of the sensor devices. It is cost-effective and suitable for applications in structural health monitoring and human-machine interface sensing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Astronomy & Astrophysics
Wenbo Li, Yiding Chen, Libo Liu, Trond S. Trondsen, Craig Unick, Devin Wyatt, Baiqi Ning, Guozhu Li, Cong Huang, Sipeng Yang, Huijun Le
Summary: The Fabry-Perot interferometer system was used to observe thermospheric winds at Mohe, China in July 2019. The observations revealed diurnal and seasonal variations in thermospheric winds, with a model established based on the data. Comparison with HWM14 showed overall consistency, but differences were found when comparing observations with Kelan FPI data.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Serkan Sirt, Emre Iren, Deniz Eksi, Aylin Yildiz Tunali, Eren Guvenilir, Enver M. Kendirlik, Nissim Ofek, Vladimir Umansky, Stefan Ludwig, Afif Siddiki
Summary: Here we discuss the effect of topology on the quantum Hall effect, considering the direct Coulomb interactions and two distinct geometries. We show that the local distributions and compressibility of the electron number density, electrochemical potential, and current depend on electron-electron interactions. Our experimental results contradict the standard explanation and confirm the presence of incompressible regions in a compressible state.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Physics, Applied
Zhifeng Tong, Lina Wang, Tingting Duan, Youfu Geng, Xuejin Li, Duo Yi, Xueming Hong
Summary: This study proposes a high-resolution optical fiber Fabry-Perot (FP) temperature sensor based on an exposed-core microstructured optical fiber (ECF) coated with a ultraviolet curing polymer adhesive. By expanding the input light beam with a small piece of multimode fiber (MMF) spliced in front of ECF, a parallel polymer/air double-cavity FP is constructed in a single-mode fiber (SMF)-MMF-ECF-SMF structure. The interference signal is analyzed using a mobilized demodulation module based on phase demodulation method. The experimental results show that the sensor has a temperature sensitivity of 30.8 degrees Celsius(-1) and a resolution of up to 1.6 x 10(-4) degrees Celsius in the temperature range of 20-50 degrees Celsius, achieving high-resolution temperature measurement. Additionally, a double-cavity self-reference differential phase modulation method is explored in the proposed parallel double-cavity FP to alleviate wavelength uncertainty and improve stability.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Hongwei Liang, Yu Sun, Zhen Huang, Chunlei Jiang, Zihua Zhang, Lingling Kan
Summary: A novel reconstruction method for nanometer micro-displacement of Fabry-Perot (F-P) interference is proposed in this study, utilizing Hilbert transforms and tangent operations. The validity of the algorithm and structure is verified through simulation and experimental measurements, with results showing a maximum relative error of 4.9%.
CHINESE OPTICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Tiago Paixao, Ana Sofia Nunes, Joerg Bierlich, Jens Kobelke, Marta S. Ferreira
Summary: An optical fiber tip sensor based on a Fabry-Perot interferometer is developed for ethanol detection in the gas phase. The sensor achieves interaction between light and ethanol gas molecules through fusion splicing a suspended core fiber with a single mode fiber. The sensor exhibits linear response and high sensitivity, making it a potential alternative for detecting gaseous ethanol in food and beverages.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Monserrat Alonso-Murias, David Monzon-Hernandez, Enrique Antonio-Lopez, Axel Schulzgen, Rodrigo Amezcua-Correa, Joel Villatoro
Summary: A nano-displacement sensing method based on an extrinsic hybrid fiber Fabry-Perot interferometer is proposed, achieving a resolution of 0.47 nm. By adjusting the optical path length difference between the air cavity and glass cavity, an interference spectra envelope with a larger period can be generated.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Marjan Ghasemi, Jeongmin Oh, Sunghoon Jeong, Mingyu Lee, Saeed Bohlooli Darian, Kyunghwan Oh, Jun Ki Kim
Summary: We have developed a fiber-optic sensor based on the Fabry-Perot interferometer principles for the detection of blood clot formation. The sensor consists of two types of sensor tips: a tapered fiber and an ultra-compact blood FPI on a single-mode fiber. The sensor's performance was evaluated by introducing varying quantities of thrombin reagent into the blood and analyzing the resulting clot-formation-indicating spectrum shifts.
Article
Chemistry, Multidisciplinary
Lingfei Zhao, Ethan G. Arnault, Trevyn F. Q. . Larson, Zubair Iftikhar, Andrew Seredinski, Tate Fleming, Kenji Watanabe, Takashi Taniguchi, Francois Amet, Gleb Finkelstein
Summary: The vanishing band gap of graphene has posed challenges for creating high-quality quantum point contacts. However, recent advances have allowed split-gate QPCs to operate using the highly resistive v = 0 state. Researchers have developed a simple method of fabricating QPCs by etching a narrow trench in the graphene sheet, separating the conducting channel from self-aligned graphene side gates. This technique has enabled the creation and study of a quantum Hall interferometer.
Article
Engineering, Electrical & Electronic
Ghulam Abbas Lashari, Farhan Mumtaz, Sohail Ahmed
Summary: The study proposed and investigated a strain sensor based on Vernier Effect with high sensitivity, low temperature cross-sensitivity, simple fabrication, and low cost, suitable for applications in engineering fields such as structural health monitoring and civil engineering.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Neurosciences
Yuwen Chen, Buhua Chen, Tengfei Yu, Lu Yin, Mingjian Sun, Wen He, Cheng Ma
Summary: The article introduces the application of photoacoustic mesoscopy in mouse cerebral imaging, highlighting the advantages and experimental process of using an all-optical ultrasound sensor based on a Fabry-Perot polymer cavity. 3D images of mouse brain vasculature with high quality were reconstructed through imaging segmentation and dual wavelength imaging, demonstrating the potential of the system in preclinical brain research.
FRONTIERS IN NEUROSCIENCE
(2021)
Article
Engineering, Multidisciplinary
Enes Yigit, Sekip Esat Hayber, Umut Aydemir
Summary: An artificial neural network (ANN) based model was developed for MEMS diaphragm analysis, specifically targeting TLC diaphragms for FabryPerot interferometers. By training the ANN estimator with diaphragm parameters, the model successfully estimated the pressure responses of different diaphragm materials, showing its superior performance compared to traditional empirical equations.
Article
Chemistry, Analytical
D. Nanda Kumar, Shirly Reingewirtz, Moshe Shemesh, Ran Suckeveriene, Giorgi Shtenberg
Summary: In this study, an optical sensing approach based on nanostructured porous silicon was developed for real-time monitoring of lead contaminants using DNAzyme. The platform showed accurate and rapid detection of lead in the range of 0.1-25 ppb, with a detection limit of 0.49 ppb.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Eran Sagi, Yuval Oreg, Ady Stern, Bertrand I. Halperin
Article
Materials Science, Multidisciplinary
Yuval Baum, Thore Posske, Ion Cosma Fulga, Bjoern Trauzettel, Ady Stern
News Item
Physics, Multidisciplinary
Ady Stern
Article
Multidisciplinary Sciences
Mitali Banerjee, Moty Heiblum, Amir Rosenblatt, Yuval Oreg, Dima E. Feldman, Ady Stern, Vladimir Umansky
Article
Physics, Multidisciplinary
Charles L. Kane, Ady Stern, Bertrand I. Halperin
Article
Multidisciplinary Sciences
Carsten Putzke, Maja D. Bachmann, Philippa McGuinness, Elina Zhakina, Veronika Sunko, Marcin Konczykowski, Takashi Oka, Roderich Moessner, Ady Stern, Markus Koenig, Seunghyun Khim, Andrew P. Mackenzie, Philip J. W. Moll
Article
Multidisciplinary Sciences
Asaf Rozen, Jeong Min Park, Uri Zondiner, Yuan Cao, Daniel Rodan-Legrain, Takashi Taniguchi, Kenji Watanabe, Yuval Oreg, Ady Stern, Erez Berg, Pablo Jarillo-Herrero, Shahal Ilani
Summary: The study reveals a transition from a low-entropy electronic liquid to a high-entropy correlated state in magic-angle twisted bilayer graphene under the influence of electron density, temperature, and magnetic field. The correlated state demonstrates a unique combination of properties associated with itinerant electrons and localized moments, with distinct energy scales for different characteristics. The hybrid nature of the correlated state and the separation of energy scales have significant implications for the thermodynamic and transport properties of twisted bilayer graphene.
Review
Nanoscience & Nanotechnology
Karsten Flensberg, Felix von Oppen, Ady Stern
Summary: Topological qubits are a promising method for storing quantum information in a topologically protected manner, but are difficult to realize. Recent research has focused on combining superconductivity, spin-orbit coupling, and a magnetic field to achieve this goal, with the Majorana-based approach being at the forefront of these efforts.
NATURE REVIEWS MATERIALS
(2021)
Article
Physics, Multidisciplinary
Ari M. Turner, Erez Berg, Ady Stern
Summary: In this study, the stability of fragile topological bands protected by space-time inversion symmetry under strong electron-electron interactions is investigated. It is found that when these fragile bands are half filled, interactions can open a gap in the many-body spectrum without breaking any symmetry or mixing degrees of freedom from remote bands. The resulting ground state is not topologically ordered. The formation of fermionic bound states known as trions is crucial for this result, which may be relevant to recent experiments in magic angle twisted bilayer graphene at charge neutrality.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Bivas Dutta, Wenmin Yang, Ron Melcer, Hemanta Kumar Kundu, Moty Heiblum, Vladimir Umansky, Yuval Oreg, Ady Stern, David Mross
Summary: Quantum Hall states have unique quantum phases characterized by gapless edge modes. The most studied nonabelian state is the spin-polarized filling factor 5/2, which can have different topological orders. By interfacing this state with another, we were able to identify its topological order as the particle-hole Pfaffian (PH-Pf) order.
Article
Multidisciplinary Sciences
C. Kumar, J. Birkbeck, J. A. Sulpizio, D. Perello, T. Taniguchi, K. Watanabe, O. Reuven, T. Scaffidi, Ady Stern, A. K. Geim, S. Ilani
Summary: Recent research has shown that hydrodynamic electronic phenomena can transcend the fundamental limitations of ballistic electrons, with important implications for fundamental science and future technologies. High-mobility graphene Corbino disk devices were used to image single-electron-transistor electronic flow, revealing the elimination of bulk Landauer-Sharvin resistance by electron hydrodynamics. This study highlights the potential of electronic fluids to revolutionize electronic conduction.
Article
Multidisciplinary Sciences
A. Inbar, J. Birkbeck, J. Xiao, T. Taniguchi, K. Watanabe, B. Yan, Y. Oreg, Ady Stern, E. Berg, S. Ilani
Summary: The invention of the quantum twisting microscope (QTM) allows for direct observation of key quantum properties of electronic systems. By creating pristine two-dimensional junctions and using a unique van der Waals tip, the QTM enables local interference experiments at its tip, providing a multitude of interfering paths for electrons to tunnel into a sample. Through various experiments, the QTM demonstrates room-temperature quantum coherence, studies the evolution of twist angles in twisted bilayer graphene, images the energy bands of monolayer and twisted bilayer graphene, and visualizes the flattening of the low-energy band of twisted bilayer graphene under local pressure. The QTM opens up new possibilities for studying quantum materials.
Article
Materials Science, Multidisciplinary
Ohad Antebi, Ady Stern, Erez Berg
Summary: Three symmetries prevent a twisted bilayer of graphene from developing an in-plane spontaneous magnetization in the absence of a magnetic field. Experimental and theoretical indications suggest that these symmetries may be broken spontaneously under certain conditions. In such cases, the in-plane orbital magnetization serves as a sensitive probe for detecting the simultaneous breaking of these three symmetries.
Article
Materials Science, Multidisciplinary
Yuval Baum, Ady Stern
Article
Materials Science, Multidisciplinary
Konrad Wolms, Ady Stern, Karsten Flensberg