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

Propagation of Waves01:07

Propagation of Waves

2.3K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.3K
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

3.6K
The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed...
3.6K
Interference: Path Lengths01:10

Interference: Path Lengths

1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

415
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
415
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

874
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
874
Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

82
Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
82

You might also read

Related Articles

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

Sort by
Same author

Parallel execution of nonlinear logic circuits using reconfigurable free-space diffractive optics.

Nature communications·2026
Same author

Overcoming stress limitations in SiN nonlinear photonics via a bilayer waveguide.

Nanophotonics (Berlin, Germany)·2025
Same author

Efficient excitation and control of integrated photonic circuits with virtual critical coupling.

Nature communications·2024
Same author

All-optical frequency division on-chip using a single laser.

Nature·2024
Same author

All-dielectric scale invariant waveguide.

Nature communications·2023
Same author

Nano-spectroscopy of excitons in atomically thin transition metal dichalcogenides.

Nature communications·2022

Related Experiment Video

Updated: Jun 5, 2025

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY
10:28

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY

Published on: June 30, 2016

13.5K

Clearing a path for light through non-Hermitian media.

Utsav D Dave1, Gaurang R Bhatt2, Janderson R Rodrigues1

  • 1Columbia Nano Initiative, Columbia University, New York, NY, USA.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

Engineered a novel low-loss photonic waveguide using non-Hermitian systems to reduce signal loss in active photonic devices. This breakthrough enables high-performance devices and faster thermo-optic phase shifters.

Keywords:
lossy mediametal clad waveguidesnon-Hermitianthermo-optic

More Related Videos

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

12.3K
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

18.9K

Related Experiment Videos

Last Updated: Jun 5, 2025

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY
10:28

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY

Published on: June 30, 2016

13.5K
Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

12.3K
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

18.9K

Area of Science:

  • Photonics
  • Materials Science
  • Quantum Physics

Background:

  • Active photonic devices are limited by signal loss.
  • Loss management is crucial for device performance.
  • Existing waveguides struggle with efficient loss control.

Purpose of the Study:

  • To engineer a low-loss path in a metal-clad lossy multi-mode waveguide.
  • To demonstrate high-performance active photonic devices using this engineered waveguide.
  • To apply this platform for power-efficient and fast thermo-optic phase shifters.

Main Methods:

  • Leveraging non-Hermitian systems operating beyond the exceptional point.
  • Designing a metal-clad lossy multi-mode waveguide.
  • Utilizing loss redistribution for mode-selective attenuation.

Main Results:

  • Achieved low propagation loss (<0.02 dB/μm) for the fundamental mode.
  • Demonstrated high performance efficiency (P·τ = 19.1 mW·μs) in thermo-optic phase shifters.
  • Obtained significantly faster response times (τ ≈ 1.4 μs) compared to silicon-based devices.

Conclusions:

  • Non-Hermitian photonics offers a viable solution to overcome loss limitations in active devices.
  • The engineered waveguide platform enables efficient loss management and improved device characteristics.
  • This approach paves the way for next-generation, high-performance, and energy-efficient photonic integrated circuits.