Results 281 to 290 of about 897,436 (329)
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Nature Photonics, 2023
We demonstrate an electrically controlled vanadium dioxide (VO_2)–metal metasurface for the mid-wave infrared regime that simultaneously functions as a tunable optical switch, an optical limiter with a tunable limiting threshold and a nonlinear optical ...
Jonathan King +6 more
semanticscholar +1 more source
We demonstrate an electrically controlled vanadium dioxide (VO_2)–metal metasurface for the mid-wave infrared regime that simultaneously functions as a tunable optical switch, an optical limiter with a tunable limiting threshold and a nonlinear optical ...
Jonathan King +6 more
semanticscholar +1 more source
Tunable Filters with Extended Tunability
Japanese Journal of Applied Physics, 1992Filters with extended tunability using waveguide devices are proposed. The first and second types of filters are combinations of a filter with a wide tuning range and a filter with narrow passbands. The first type is composed of cascaded filters and the second type is the filter with a wide tuning range embedded in a resonator.
Hideaki Okayama Hideaki Okayama +1 more
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Tunable FBARs: Intrinsic vs. extrinsic tunability
2012 IEEE/MTT-S International Microwave Symposium Digest, 2012The methods used to make the Film Bulk Acoustic Resonators (FBAR) tunable is reviewed. Intrinsically tunable FBARs make use ferroelectrics in ferroelectric and paraelectric (non-polar) phases have tunabilities up to 5% and more. Extrinsically tunable resonators are based on traditional piezoelectric FBARs and make use of external varactors and ...
S. Gevorgian, A. Vorobiev
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Tunable acoustic metasurface based on tunable piezoelectric composite structure
The Journal of the Acoustical Society of America, 2022Due to the potential engineering needs, the passive tunable metasurfaces with a high performance equivalent to the active phased array is worthy of research. Here, a passive ultrathin metasurface unit composed of a piezoelectric composite structure (PCS) connected to an external capacitor, which can modulate the phase of the transmitted acoustic waves ...
Yao-Yin Peng +5 more
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Unprecedented Tunable Tetraazamacrocycles
Organic Letters, 2010Novel nitrogen-bridged aza[1(4)]cyclophanes with fine-tuned cavities have been synthesized by nucleophilic aromatic substitution of 1,5-difluoro-2,4-dinitrobenzene with diaminobenzene derivatives.
Haddoub, R. +3 more
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Tunable and Active Phononic Crystals and Metamaterials
, 2020Phononic crystals (PCs) and metamaterials (MMs) can exhibit abnormal properties, even far beyond those found in nature, through artificial design of the topology or ordered structure of unit cells. This emerging class of materials has diverse application
Yan‐Feng Wang +4 more
semanticscholar +1 more source
Advanced Functional Materials, 2022
Organic ultralong room‐temperature phosphorescence (RTP) materials have promising applications in anti‐counterfeiting. To improve the encryption level, the exploration of organic materials with tunable solid‐state long persistent luminescence is in ...
Deliang Wang +6 more
semanticscholar +1 more source
Organic ultralong room‐temperature phosphorescence (RTP) materials have promising applications in anti‐counterfeiting. To improve the encryption level, the exploration of organic materials with tunable solid‐state long persistent luminescence is in ...
Deliang Wang +6 more
semanticscholar +1 more source
Optics Letters, 2016
We report the demonstration of a tunable dysprosium laser. The experiment employed in-band pumping of a Dy3+-doped fluoride fiber and a simple resonator design involving a ruled diffraction grating. The laser produced tuning between 2.95 and 3.35 μm, limited by the availability of optics.
Matthew R, Majewski, Stuart D, Jackson
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We report the demonstration of a tunable dysprosium laser. The experiment employed in-band pumping of a Dy3+-doped fluoride fiber and a simple resonator design involving a ruled diffraction grating. The laser produced tuning between 2.95 and 3.35 μm, limited by the availability of optics.
Matthew R, Majewski, Stuart D, Jackson
openaire +2 more sources
Analytical Chemistry, 2010
We have developed a resistance-based chemical sensor (chemiresistor) for volatile organic compounds whose sensitivity can be reversibly increased over a range of nearly 2 decades by the application of tensile strain. This polymer-based sensor is comprised of Au-plated magnetic particles structured into conducting chains by the application of a magnetic
Douglas H, Read, James E, Martin
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We have developed a resistance-based chemical sensor (chemiresistor) for volatile organic compounds whose sensitivity can be reversibly increased over a range of nearly 2 decades by the application of tensile strain. This polymer-based sensor is comprised of Au-plated magnetic particles structured into conducting chains by the application of a magnetic
Douglas H, Read, James E, Martin
openaire +2 more sources
Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice
Nature, 2019Studies of two-dimensional electron systems in a strong magnetic field revealed the quantum Hall effect1, a topological state of matter featuring a finite Chern number C and chiral edge states2,3.
Guorui Chen +21 more
semanticscholar +1 more source