Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

734
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
734
Active Filters01:25

Active Filters

1.1K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.1K
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

256
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
256
Phase Changes01:19

Phase Changes

4.7K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.7K
Passive Filters01:27

Passive Filters

751
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
751
Phase Transitions02:31

Phase Transitions

21.0K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
21.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Poly(I:C)-stimulated alveolar macrophages modulate extracellular matrix turnover and fibroblast activation through cystatin 6 and cathepsin B.

European journal of pharmacology·2026
Same author

Integrated physiological, hormonal, and transcriptomic analyses reveal pistil responses to pollen sources of varying compatibility in 'Fengtang' plum (Prunus salicina).

BMC plant biology·2026
Same author

Corrigendum to "Ubiquinol ameliorates social disruption-induced behavioral changes via modulating inflammatory responses and PPARα activation" [Behav. Brain Res. 508 (2026), 116215].

Behavioural brain research·2026
Same author

Temporal super-cell engineering and acoustic amplification in dispersive phononic time crystals.

Nature communications·2026
Same author

Author Correction: Gut microbiota-modulated glutamic acid rejuvenates the quality of oocytes deteriorated by advanced reproductive age.

EMBO molecular medicine·2026
Same author

Gut microbiota-modulated glutamic acid rejuvenates the quality of oocytes deteriorated by advanced reproductive age.

EMBO molecular medicine·2026

Related Experiment Video

Updated: Nov 1, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.5K

Flexible Phase Change Materials for Electrically-Tuned Active Absorbers.

Jia-Nan Wang1, Bo Xiong1, Ru-Wen Peng1

  • 1National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 26, 2021
PubMed
Summary

Flexible phase change materials (FPCMs) are realized on mica for tunable optical metadevices. These FPCMs enable stable, electrically tunable infrared absorption in flexible devices, overcoming thermal instability limitations.

Keywords:
flexible and electrically-tuned metadevicesflexible electrically-tuned infrared meta-absorberflexible phase change materials

More Related Videos

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.6K
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.3K

Related Experiment Videos

Last Updated: Nov 1, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.5K
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.6K
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.3K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Phase change materials (PCMs) like GeSbTe and VO2 are crucial for tunable optical metadevices.
  • High annealing temperatures (above 700 K) for PCMs conflict with the thermal instability of flexible metadevices (below 500 K).
  • This thermal mismatch limits integrating PCMs into flexible optical systems.

Purpose of the Study:

  • To develop a flexible phase change material (FPCM) compatible with flexible metadevices.
  • To demonstrate an electrically tunable infrared meta-absorber using the novel FPCM.
  • To overcome the thermal limitations of integrating PCMs into flexible optical systems.

Main Methods:

  • Utilized a mica sheet as a support for chemosynthetic growth of VO2 to create a flexible phase change material (FPCM).
  • Fabricated a metal-FPCM-metal infrared meta-absorber device.
  • Investigated the mechanical flexibility and electrical tunability of the FPCM-based metadevice.

Main Results:

  • Achieved a smooth, uniform FPCM that is mechanically flexible and withstands high temperatures.
  • Demonstrated continuous electrical tuning of infrared absorption from 20% to 90% by altering applied current.
  • Confirmed device stability under bending (up to 1500 cycles) with no visible deterioration.

Conclusions:

  • Introduced FPCM metastructures as a new class of flexible materials.
  • Highlighted FPCM-based metadevices' potential for tunable conformal optics, flexible photodetectors, and wearable devices.