Results 51 to 60 of about 1,188 (162)

Low-loss surface-plasmonic nanobeam cavities

Optics Express, 2010
One-dimensional surface-plasmonic nanobeam cavities are proposed as a means to confine surface plasmons to a subwavelength-scale mode volume, while maintaining a relatively high Q-factor. By bonding one-dimensional photonic-crystal nanobeam structures to a low-loss metallic substrate, a clear plasmonic TM bandgap can be formed.
Kim, MK Kim, Myung-Ki, Lee, SH Lee, Seung Hoon, Choi, M Choi, Muhan, Ahn, BH Ahn, Byeong-Hyeon, Park, N Park, Namkyoo, Lee, YH Lee, Yong-Hee, Min, B Min, Bumki   +6 more
openaire   +3 more sources

Coupled photonic crystal nanobeam cavities [PDF]

Applied Physics Letters, 2009
We describe the design, fabrication, and spectroscopy of coupled, high quality (Q) factor silicon nanobeam photonic crystal cavities. We show that the single nanobeam cavity modes are coupled into even and odd superposition modes, and we simulate the frequency and Q factor as a function of nanobeam spacing, demonstrating that a differential wavelength ...
Deotare, Parag B., McCutcheon, Murray W., Frank, Ian W., Khan, Mughees, Loncar, Marko   +4 more
openaire   +2 more sources

Visualizing Strain‐Coupled Cryogenic Phase Transitions and Defect Dynamics in Perovskite Quantum Dots Using In Situ STEM

Advanced Science, EarlyView.
Cryogenic cooling induces an orthorhombic‐to‐monoclinic phase transition in CsPbBr3 quantum dots, accompanied by pronounced strain localization at surfaces and interfaces. Multimodal in situ STEM directly visualize reversible defect healing during moderate cryogenic treatment and irreversible degradation upon prolonged exposure, revealing the intrinsic
Xinjuan Li, Zhao Jiang, Si Chen, Yi Tang, Bofeng Xue, Tianhao Wu, Yang Lu, Xavier Moya, Akshay Rao, Zhongzheng Yu, Caterina Ducati   +10 more
wiley   +1 more source

Silicon On-Chip One-Dimensional Photonic Crystal Nanobeam Bandgap Filter Integrated With Nanobeam Cavity for Accurate Refractive Index Sensing

IEEE Photonics Journal, 2016
A novel method for integration of high-performance 1-D photonic crystal nanobeam bandgap filter (1-D PC-NBF) and high-sensitivity 1-D PC nanobeam cavity sensor (1-D PC-NCS) is proposed on a monolithic silicon chip. The 1-D PC-NBF consists of a simple 1-D
Daquan Yang, Chuan Wang, Yuefeng Ji
doaj   +1 more source

Displacive In‐Plane Ferroelectricity with Domain‐Specific Curie Temperature in Van der Waals Semiconductors

Advanced Science, EarlyView.
Temperature‐dependent electron diffraction on tin monochalcogenides demonstrates a gradual displacive transformation between ferroelectric and paraelectric phases with significant variability in lattice constants and Curie temperature (TC). Periodic variations exist even between domains in individual crystals, implying a domain‐specific Curie ...
Peter Sutter, Eli Sutter
wiley   +1 more source

A robust, fiber-coupled scanning probe magnetometer using electron spins at the tip of a diamond nanobeam

New Journal of Physics
Fiber-coupled sensors are well suited for sensing and microscopy in hard-to-reach environments such as biological or cryogenic systems. We demonstrate fiber-based magnetic imaging based on nitrogen-vacancy (NV) sensor spins at the tip of a fiber-coupled ...
Yufan Li, Gesa Welker, Richard Norte, Toeno van der Sar   +3 more
doaj   +1 more source

Design of a Chalcogenide -based 1D Photonic Crystal Nanobeam Cavity

Majlesi Journal of Electrical Engineering
This article presents the design and optimization of a side-coupled chalcogenide-based 1D PhC nanobeam cavity in the mid-IR spectral range. The structure configuration consists of 1D PhC nanobeam and side-coupled bending bus waveguide for efficient ...
Seyed Mohammad Zare, Majid Ebnali Heidari, Mohammad Reza Shayesteh, Aliakbar Ebnali Heidari, Maryam Nayeri   +4 more
doaj   +1 more source

Nonlinear vibration analysis of fractional viscoelastic nanobeam

Journal of Vibration Engineering & Technologies, 2022
Abstract Considering the size-dependent influence ignored by classical continuum mechanics, a new non-classical Euler-Bernoulli beam model is proposed in this paper. The new fractional viscoelastic nanobeam model is set up by using the fractional viscoelastic Kelvin-Voigt model and Hamilton's principle.
Meifeng Qiu, Dongxia Lei, Zhiying Ou
openaire   +1 more source

Transient Terahertz Oscillations During Photoinduced Polarization Topology Reconfiguration in Ferroelectric Superlattices

Advanced Science, EarlyView.
Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan, Hyeon Jun Lee, Xiangwei Guo, Youngjun Ahn, Samuel D. Marks, Mohammed H. Yusuf, Matthew Dawber, James M. Glownia, Diling Zhu, Takahiro Sato, Sanghoon Song, Haidan Wen, Jia‐Mian Hu, Paul G. Evans   +13 more
wiley   +1 more source

Nonlocal vibration of a fractional order viscoelastic nanobeam with attached nanoparticle [PDF]

Theoretical and Applied Mechanics, 2015
We propose a novel mathematical framework to examine the free damped transverse vibration of a nanobeam by using the nonlocal theory of Eringen and fractional derivative viscoelasticity.
Cajić Milan, Karličić Danilo, Lazarević Mihailo   +2 more
doaj   +1 more source