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

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

378
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
378
Induced Electric Dipoles01:28

Induced Electric Dipoles

4.2K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.2K
Unsymmetric Bending - Angle of Neutral Axis01:15

Unsymmetric Bending - Angle of Neutral Axis

291
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
291
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

234
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
234
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

4.6K
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...
4.6K

You might also read

Related Articles

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

Sort by
Same author

Editorial: Harnessing invasive plant species into valuable products.

Frontiers in plant science·2026
Same author

TDGF1 Mediates the Oncogenic Effects of the OLMALINC/miR-3614-5p ceRNA Axis in Colon Cancer Through Nodal/Smad2 and Glypican-1/MAPK-AKT Signaling.

Cells·2026
Same author

Early versus delayed urethroplasty for pediatric pelvic fracture-related urethral injury in boys: a retrospective comparative cohort study of complications and surgical success rates from a single center.

Translational andrology and urology·2026
Same author

Integrating ANP32A expression with Ann Arbor stage refines prognostic stratification in extranodal NK/T-cell lymphoma.

Diagnostic pathology·2026
Same author

Optimized protocols for culturing and sectioning mouse intestinal organoids: enhancing efficiency and structural integrity.

MethodsX·2026
Same author

Integrated genomic and immunophenotypic profiling reveals monoclonal origin, smoking-driven evolution and heterogeneous microenvironment in pulmonary adenosquamous carcinoma.

Frontiers in immunology·2026

Related Experiment Video

Updated: Jun 17, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.3K

Directional Phase and Polarization Manipulation Using Janus Metasurfaces.

Yiwen Zhou1, Teng Zhang1, Guannan Wang1

  • 1Terahertz Technology Innovation Research Institute, and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 JunGong Road, Shanghai, 200093, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 9, 2024
PubMed
Summary

Researchers developed a Janus metasurface for terahertz waves, enabling independent control of phase and polarization. This breakthrough allows for direction-encoded focusing and polarization conversion for advanced imaging and security applications.

Keywords:
Janus metasurfacesdirectional imagingdirectional phase and polarization modulationdirection‐ and polarization‐dependent detection

More Related Videos

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.7K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.8K

Related Experiment Videos

Last Updated: Jun 17, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.3K
Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.7K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.8K

Area of Science:

  • Metamaterials and Nanophotonics
  • Electromagnetics and Wave Manipulation
  • Terahertz (THz) Technology

Background:

  • Janus metasurfaces offer asymmetric wavefront control for forward and backward electromagnetic waves.
  • Existing Janus metasurfaces primarily provide directional phase manipulation, limiting their versatility.
  • Novel applications in asymmetric information processing, security, and signal multiplexing are hindered by current limitations.

Purpose of the Study:

  • To propose a versatile Janus metasurface platform for directional control of terahertz wave phase and polarization.
  • To integrate functionalities of wave plates and metallic gratings within a cascaded structure.
  • To demonstrate independent and simultaneous control over phase and polarization.

Main Methods:

  • Design and fabrication of a cascaded Janus metasurface structure.
  • Integration of half-wave plate, quarter-wave plate, and metallic grating functionalities.
  • Experimental demonstration of propagation direction-encoded focusing and polarization conversion.

Main Results:

  • Successful demonstration of Janus metasurfaces with independent and simultaneous phase and polarization control.
  • Achieved propagation direction-encoded focusing and polarization conversion.
  • Utilized directionally focused points with distinct polarization states for sensitive detection and imaging.

Conclusions:

  • The proposed Janus metasurface platform enables unprecedented control over terahertz wave phase and polarization.
  • This strategy opens new avenues for ultra-compact devices in imaging, encryption, and data storage.
  • The direction-dependent versatility enhances applications in security and information processing.