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

Passive Filters01:27

Passive Filters

537
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...
537
Convolution Properties II01:17

Convolution Properties II

192
The important convolution properties include width, area, differentiation, and integration properties.
The width property indicates that if the durations of input signals are T1 and T2, then the width of the output response equals the sum of both durations, irrespective of the shapes of the two functions. For instance, convolving two rectangular pulses with durations of 2 seconds and 1 second results in a function with a width of 3 seconds.
The area property asserts that the area under the...
192
Vector Algebra: Method of Components01:08

Vector Algebra: Method of Components

13.9K
It is cumbersome to find the magnitudes of vectors using the parallelogram rule or using the graphical method to perform mathematical operations like addition, subtraction, and multiplication. There are two ways to circumvent this algebraic complexity. One way is to draw the vectors to scale, as in navigation, and read approximate vector lengths and angles (directions) from the graphs. The other way is to use the method of components.
In many applications, the magnitudes and directions of...
13.9K
Convolution Properties I01:20

Convolution Properties I

147
Convolution computations can be simplified by utilizing their inherent properties.
The commutative property reveals that the input and the impulse response of an LTI (Linear Time-Invariant) system can be interchanged without affecting the output:
147
Discrete-time Fourier transform01:26

Discrete-time Fourier transform

309
The Discrete-Time Fourier Transform (DTFT) is an essential mathematical tool for analyzing discrete-time signals, converting them from the time domain to the frequency domain. This transformation allows for examining the frequency components of discrete signals, providing insights into their spectral characteristics. In the DTFT, the continuous integral used in the continuous-time Fourier transform is replaced by a summation to accommodate the discrete nature of the signal.
One of the notable...
309
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

89
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
89

You might also read

Related Articles

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

Sort by
Same author

Elastic Boundary Control in Acoustic Waveguides for High-Fidelity Physical-Layer Telemetry in Downhole Sensor Networks.

Sensors (Basel, Switzerland)·2026
Same author

Orthogonal Band Planning and Synergistic Interference Suppression for Full-Duplex Acoustic Telemetry in Coiled Tubing of Deep Horizontal Wells.

Sensors (Basel, Switzerland)·2026
Same author

Clinical and Modifiable Factors Associated With Disability and Relapse in MOGAD: A Multicentre Cohort Study.

Annals of clinical and translational neurology·2026
Same author

A structured teaching module for postoperative follow-up in urology residency training: development and evaluation of an IMDB-based educational tool.

BMC medical education·2026
Same author

Supramolecular Organic Framework-Enabled AIE-Enhanced Electrochemiluminescence: Dual-Readout Ultrasensitive Determination of Microcystin-LR in Environmental Waters.

Analytical chemistry·2026
Same author

Lipids and glucose fluctuations are associated with clinically diagnosed depression in older adults with type 2 diabetes.

Frontiers in endocrinology·2026
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Jun 27, 2025

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

6.1K

Non-Hermitian Moiré Valley Filter.

Kai Shao1, Hao Geng1, Erfu Liu1

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

Physical Review Letters
|April 29, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel graphene bilayer valley filter for valleytronics. This device generates a highly polarized current, offering robust and tunable performance with relaxed implementation needs.

More Related Videos

Optical Scatter Microscopy Based on Two-Dimensional Gabor Filters
14:58

Optical Scatter Microscopy Based on Two-Dimensional Gabor Filters

Published on: June 2, 2010

9.6K
Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

8.0K

Related Experiment Videos

Last Updated: Jun 27, 2025

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

6.1K
Optical Scatter Microscopy Based on Two-Dimensional Gabor Filters
14:58

Optical Scatter Microscopy Based on Two-Dimensional Gabor Filters

Published on: June 2, 2010

9.6K
Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

8.0K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Valleytronics aims to utilize electron valley degrees of freedom for information processing.
  • Implementing efficient valley filters, crucial for valleytronics, faces significant challenges.
  • Graphene-based heterostructures are promising platforms for novel electronic functionalities.

Purpose of the Study:

  • To propose and theoretically investigate a novel valley filter based on a graphene bilayer.
  • To demonstrate the generation of a valley-polarized current using engineered moiré patterns and heterostrain.
  • To explore the underlying physics, including non-Hermitian effects, and assess the filter's robustness and tunability.

Main Methods:

  • Theoretical modeling of a graphene bilayer with a 1D moiré pattern induced by heterostrain.
  • Development of an effective non-Hermitian theory to describe valley-dependent electron dissipation.
  • Analysis of valley-resolved non-Hermitian skin effect for current generation.

Main Results:

  • Achieved nearly 100% valley polarization over a broad parameter range.
  • Demonstrated electrical tunability of the valley filter's functionality.
  • Showcased high tolerance to imperfections like disorder and edge defects due to a non-Hermitian topological scenario.

Conclusions:

  • The proposed graphene bilayer structure serves as an efficient and robust valley filter.
  • The device leverages valley asymmetric interlayer coupling and non-Hermitian physics.
  • This work provides a promising pathway for practical valleytronics devices with relaxed fabrication constraints.