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

Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

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 filters, manage...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Group Polarization01:01

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...

You might also read

Related Articles

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

Sort by
Same author

The CRISPR-Cas toolkit for mosquito-borne virus surveillance: detection, tracing, and discovery.

Frontiers in cellular and infection microbiology·2026
Same author

Effects of hamstring conditioning contraction on landing biomechanics and surface EMG: a randomized controlled trial.

Frontiers in bioengineering and biotechnology·2026
Same author

Attention-guided temporal convolutional pseudo-velocity generation for underwater inertial/Doppler navigation.

Scientific reports·2026
Same author

Engineering pH-Responsive High Internal Phase Pickering Emulsions Stabilized by Copolymer Nanoparticle-Lipase Complexes for Sustainable Enzymatic Microreactors.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Mitochondrion-targeted therapies for diabetic wound healing: from mechanism to therapeutic opportunity.

Burns & trauma·2026
Same author

A Novel Polyacrylamide/Sodium Alginate/Polypyrrole Composite Hydrogel for Fabricating Flexible Sensors for Wearable Health Monitoring.

Gels (Basel, Switzerland)·2026

Related Experiment Video

Updated: Jun 12, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Reconfigurable on-chip polarizers enabled by phase-change-material-mediated loss engineering.

Qipeng Wu, Guoxiang Wang, Xiang Shen

    Optics Express
    |June 11, 2026
    PubMed
    Summary
    This summary is machine-generated.

    We developed reconfigurable on-chip polarizers using phase-change materials for integrated photonics. These devices offer broadband, high-contrast polarization control, crucial for advanced silicon photonic circuits.

    More Related Videos

    An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
    10:33

    An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

    Published on: February 27, 2019

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    Related Experiment Videos

    Last Updated: Jun 12, 2026

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
    10:33

    An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

    Published on: February 27, 2019

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
    09:36

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

    Published on: March 19, 2016

    Area of Science:

    • Photonics
    • Materials Science
    • Electrical Engineering

    Background:

    • Active on-chip polarization control is critical for integrated photonic systems.
    • Existing methods often lack reconfigurability or nonvolatility.

    Purpose of the Study:

    • To propose and demonstrate novel reconfigurable on-chip polarizers.
    • To achieve independent engineering of polarization propagation and attenuation.

    Main Methods:

    • Utilizing a symmetric three-waveguide directional coupler.
    • Employing a nonvolatile phase-change material, Ge2Sb2Te5 (GST).
    • Exploiting controlled phase mismatch for distinct TE and TM mode coupling.

    Main Results:

    • Demonstrated broadband operation from 1500 nm to 1600 nm.
    • Achieved polarization extinction ratios exceeding 20 dB for both TE-pass and TM-pass configurations.
    • Realized independent control over propagation path and attenuation for different polarizations.

    Conclusions:

    • The proposed device offers a compact, reconfigurable, and nonvolatile solution for polarization control.
    • This strategy is highly suitable for silicon photonic integrated circuits.
    • Enables high-contrast polarization management in integrated photonic systems.