Results 111 to 120 of about 2,793 (286)

Analysis of a resonator with a directional ultrasonic vibration converter of R-L type using the finite elements method

open access: yesArchives of Acoustics, 2000
Some results of the analysis of the R-L type resonator with directional converter using the finite elements method (FEM) are presented in the paper. Three types of resonator tuning result from the analysis and they can be used for converters of other ...
T. GUDRA
doaj  

Large Faraday Rotation in Liquid Crystals With Embedded Paramagnetic Ions (Cu2+, VO2+) at Room Temperature

open access: yesAdvanced Optical Materials, EarlyView.
Large Faraday rotation at room temperature is observed in thin films of discotic copper (Cu2+: 3d9) and vanadyl (VO2+: 3d1) enaminoketone complexes. The large Verdet constant originates from a high density of paramagnetic centers, metal‐ligand p−d hybridization and π orbitals involved in optical transitions (identified by DFT calculations), as well as ...
Karolina Łempicka‐Mirek   +8 more
wiley   +1 more source

Piezoelectrically and Capacitively Transduced Hybrid MEMS Resonator with Superior RF Performance and Enhanced Parasitic Mitigation by Low-Temperature Batch Fabrication

open access: yesApplied Sciences
This study investigates a hybrid microelectromechanical system (MEMS) acoustic resonator through a hybrid approach to combine capacitive and piezoelectric transduction mechanisms, thus harnessing the advantages of both transducer technologies within a ...
Adnan Zaman   +3 more
doaj   +1 more source

Structural Analysis of Disk Micromechanical Resonator

open access: yes, 2013
运用AnSyS对圆盘谐振器的结构进行有限元分析,并结合集总参数模型,确定了圆盘谐振器锚点尺寸与位置对圆盘谐振器性能的影响,包括谐振频率,振幅与品质因子(Q).在此基础上,提出了一种在圆盘谐振器高阶模式的节点环处做锚点的方案,不仅可以使圆盘谐振器工作在更高的谐振频率,同时也降低了微加工精度的要求.Finite element method(FEM) in ANSYS is used to analyze the structure of disk micromechanical resonator ...
郭建来   +4 more
core  

Near-field characterization of a Bloch-surfacewave-based 2D disk resonator

open access: yes
We present, to the best of our knowledge, the first experimental investigation of a two-dimensional disk resonator on a dielectric multilayer platform sustaining Bloch surface waves. The disk resonator has been patterned into a few tens of nanometer thin
Roussey, M   +6 more
core   +1 more source

Multi‐Dielectric Metasurfaces for Ultrabright, Tunable Structural Color and Reconfigurable Optical Filtering with Extraordinarily Large Color Span

open access: yesAdvanced Optical Materials, EarlyView.
Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah   +2 more
wiley   +1 more source

Slotted-disk sapphire quasi-optical resonator with conducting endplates

open access: yes, 2011
Quasi-optical dielectric resonator (QDR) in a form of slotted sapphire disk sandwiched between conducting endplates (CEP) is proposed and studied in Ka-band. The resonator is excited on whispering gallery modes.
Vitusevich S. A.   +3 more
core  

ELLIPTICAL OSCILLATION IN MOLECULAR-BEAM MASER WITH DISK RESONATOR

open access: yes, 1981
It is shown that observation of elliptical oscillation at frequencies approximately 24 GHz in a molecular beam maser operated with a disk resonator is facilitated by the display of the polarization ellipse on an oscilloscope.
Yassin, Ghassan, LAINE, D
core   +1 more source

Chip‐Integrated Metasurface‐GaAsSb Nanowire Array Photodetectors for Single‐Pixel Polarimetric Imaging

open access: yesAdvanced Optical Materials, EarlyView.
A 2×2 multiplexed GaAsSb nanowire photodetector array integrated with L‐shaped metasurfaces is developed for miniaturized infrared polarimetry. Leveraging non‐radiating anapole states that facilitate near‐field enhancement, the device demonstrates strong polarization selectivity at 835 nm.
Longsibo Huang   +14 more
wiley   +1 more source

Epitaxiallyencapsulated polysilicon disk resonator gyroscope

open access: yes, 2013
We present a 0.6 mm diameter, 20 m thick epitaxially-sealed polysilicon disk resonator gyro (DRG). High Q (50,000) combined with electrostatic mode-matching and closed-loop quadrature null performed by dedicated electrode sets enables a scale-factor of 0.
C H Ahn   +10 more
core  

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