Related Experiment Video

Updated: Jul 6, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Asymmetry of the Forward and Backward Raman Gain Coefficient at 1.54 mum in Methane

Y S Choi

    Applied Optics
    |March 22, 2008
    PubMed

    More Related Videos

    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems07:44

    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

    Published on: April 28, 2016

    Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems09:57

    Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

    Published on: February 10, 2020

    Related Concept Videos

    Spin–Spin Coupling Constant: Overview01:08

    Spin–Spin Coupling Constant: Overview

    In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
    Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
    ¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

    ¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

    At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
    ¹H NMR: Complex Splitting01:13

    ¹H NMR: Complex Splitting

    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 first.
    IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

    IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

    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 stretching vibration...
    Raman Spectroscopy Instrumentation: Overview01:26

    Raman Spectroscopy Instrumentation: Overview

    A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
    The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
    Raman Spectroscopy: Overview01:20

    Raman Spectroscopy: Overview

    The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
    However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...