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

Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

1.6K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
1.6K
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

1.1K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1  triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.1K
¹H NMR Signal Multiplicity: Splitting Patterns01:13

¹H NMR Signal Multiplicity: Splitting Patterns

4.9K
When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
4.9K
¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

1.2K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.2K
Vector Algebra: Method of Components01:08

Vector Algebra: Method of Components

13.4K
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...
13.4K
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

855
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
855

You might also read

Related Articles

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

Sort by
Same author

Association of adherence to the EAT-Lancet diet and risk of uterine cancer: a prospective cohort from the UK Biobank.

Frontiers in nutrition·2026
Same author

In situ sol-gel-sol transformation formed by sodium alginate realizes folic acid-modified chitosan nanoparticles to deliver hops β-acids for colorectal cancer therapy.

Journal of nanobiotechnology·2026
Same author

Mechanisms of Aflatoxin Detoxification: Adsorption and Inhibition Strategies.

Toxins·2026
Same author

Prognostic significance and pathological correlation analysis of DKK4 in colorectal cancer.

Translational cancer research·2026
Same author

Hirsutine Ameliorates High-Fat Diet-Induced Cardiomyopathy Through Promoting LRPPRC-Regulated Mitophagy via the PINK1/Parkin Axis in Mice.

FASEB journal : official publication of the Federation of American Societies for Experimental Biology·2026
Same author

The impact of preoperative sleep disorders on postoperative pain and recovery in patients undergoing gastrectomy: a prospective cohort study.

Perioperative medicine (London, England)·2026

Related Experiment Video

Updated: May 16, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
00:07

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

Published on: September 5, 2019

8.3K

On-chip broadband power splitters via non-Hermitian subspaces.

Xiaohong Li, Zhiqiang Qi, Hongyu Tan

    Optics Letters
    |April 1, 2025
    PubMed
    Summary

    We developed a broadband 3-dB power splitter using a novel non-Hermitian triplet waveguide on silicon-on-insulator. This design achieves stable, wide-bandwidth power splitting, crucial for photonic integration.

    More Related Videos

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.3K
    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

    6.2K

    Related Experiment Videos

    Last Updated: May 16, 2025

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    00:07

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

    Published on: September 5, 2019

    8.3K
    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.3K
    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

    6.2K

    Area of Science:

    • Photonics
    • Integrated Optics
    • Waveguide Technology

    Background:

    • Broadband power splitters are essential components in photonic integrated circuits.
    • Existing designs often face limitations in bandwidth and stability.

    Purpose of the Study:

    • To propose and demonstrate a novel broadband 3-dB power splitter.
    • To achieve stable and wide-bandwidth power splitting using a non-Hermitian waveguide design.

    Main Methods:

    • Fabrication of a non-Hermitian triplet waveguide on a silicon-on-insulator platform.
    • Exploitation of mirror symmetry to decouple the system into Hermitian and non-Hermitian subspaces.
    • Analysis of the zero mode's role in broadband performance and stability.

    Main Results:

    • Demonstration of a broadband 3-dB power splitter.
    • Experimental confirmation of a 1-dB operational bandwidth exceeding 70 nm (1480 nm to 1550 nm).
    • The zero mode effectively distributes intensity and suppresses mode competition.

    Conclusions:

    • The non-Hermitian triplet waveguide offers a robust and scalable solution for broadband power splitting.
    • The approach is extendable to 1xn power splitters for advanced photonic integration.
    • This design overcomes limitations of dimensional errors and mode competition.