We propose a reconfigurable terahertz (THz) metamaterial that can control the transmittance by out-of-plane actuation with changing the sub-micron gap distance between electrically coupled metamaterial elements. By using the out-of-plane actuation, it was possible to avoid contact between the coupled metamaterial elements across the small initial gap during the adjustment of the gap size. THz spectroscopy was performed during actuation, and the transmission dip frequency was confirmed to be tunable from 0.82 to 0.92 THz for one linear polarization state and from 0.80 to 0.91 THz for the other linear polarization; the two polarizations were orthogonal. The proposed approach will contribute to the development of tunable metamaterials based on structural deformations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.23.026243 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
High-Throughput Search for Photostrictive Materials Based on a Thermodynamic Descriptor.
J Am Chem Soc
December 2024
Department of Mechanical Engineering, University of California, Santa Barbara, California 93106, United States.
Photostriction is a phenomenon that can potentially improve the precision of light-driven actuation, the sensitivity of photodetection, and the efficiency of optical energy harvesting. However, known materials with significant photostriction are limited, and effective guidelines to discover new photostrictive materials are lacking. In this study, we perform a high-throughput computational search for new photostrictive materials based on simple thermodynamic descriptors, namely, the band gap pressure and stress coefficients.
View Article and Find Full Text PDFUntethered bistable origami crawler for confined applications.
Commun Eng
October 2024
Department of Biomedical Engineering, National University of Singapore, Singapore, 117575, Singapore.
Magnetically actuated miniature origami crawlers are capable of robust locomotion in confined environments but are limited to passive functionalities. Here, we propose a bistable origami crawler that can shape-morph to access two separate regimes of folding degrees of freedom that are separated by an energy barrier. Using the modified bistable V-fold origami crease pattern as the fundamental unit of the crawler, we incorporated internal permanent magnets to enable untethered shape-morphing.
View Article and Find Full Text PDFBridging piezoelectric and electrostatic effects: a novel piezo-MEMS pitch/roll gyroscope with sub 10°/h bias instability.
Microsyst Nanoeng
October 2024
The State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.
This paper proposes a novel piezo-MEMS pitch/roll gyroscope that co-integrates piezoelectric and electrostatic effects, for the first time achieves electrostatic mode-matching operation for piezoelectric gyroscopes. Movement of operated out-of-plane (OOP) mode (n = 3) and in-plane (IP) mode (n = 2) are orthogonal, ensuring that the OOP amplitude is not significantly limited by parallel plates set at nodes of IP mode. Therefore, a large OOP driving amplitude actuated by piezoelectric and frequency tuning in the IP sense mode trimmed by electrostatic can be achieved together with a low risk of pull-in, hence releases the trade-off between the tuning range and the linear actuation range.
View Article and Find Full Text PDFHaptic artificial muscle skin for extended reality.
Sci Adv
October 2024
Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
Article Synopsis
- Existing haptic actuators struggle to mimic real-world touch sensations because they are often stiff and limited in functionality.
- The new wearable haptic artificial muscle skin (HAMS) uses soft, millimeter-scale dielectric elastomer actuators (DEAs) that allow for significant movement while remaining comfortable to wear.
- HAMS provides complex and precise tactile feedback and can be integrated into extended reality (XR) systems, opening up possibilities for use in areas like entertainment, education, and assistive technologies.
Multiferroic properties and giant piezoelectric effect of a 2D Janus WOF monolayer.
Phys Chem Chem Phys
October 2024
School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, China.
Materials possessing both ferroelectricity and ferromagnetism are regarded as ideal candidates for electronic devices, such as nonvolatile memories. Based on first-principles calculations, we systematically studied the crystal structure, electronic structure as well as magnetic, piezoelectric and ferroelectric properties of a two-dimensional van der Waals WOF monolayer material. The WOF monolayer was found to possess a robust square crystal structure, exhibiting exceptional stability and mechanical resilience.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!