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Related Concept Videos

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...
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...

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Updated: Jul 4, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Coherent Raman spectroscopy of YBa2Cu3O7.

A Rubano1, D Paparo, F Miletto Granozio

  • 11Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Complesso di Monte S. Angelo, via Cintia, 80126 Napoli, Italy.

Optics Express
|June 12, 2008
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Summary

Researchers used optical methods to detect Raman-active features in high-temperature superconductor thin films. This study is a first step toward using nonlinear optical wave-mixing spectroscopy for correlated electron systems.

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Last Updated: Jul 4, 2026

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spectroscopy

Background:

  • High-temperature superconductors like YBa(2)Cu(3)O(7) exhibit complex electronic properties.
  • Understanding these properties is crucial for developing advanced materials and technologies.
  • Raman spectroscopy is a powerful tool for probing vibrational and electronic excitations.

Purpose of the Study:

  • To investigate Raman-active features in YBa(2)Cu(3)O(7) thin films using optical driving.
  • To explore the application of coherent Stokes and anti-Stokes Raman scattering in a reflection geometry.
  • To establish a foundation for using nonlinear optical wave-mixing spectroscopy in correlated electron systems.

Main Methods:

  • Coherent Stokes and anti-Stokes Raman scattering in a reflection geometry.
  • Optical driving and spectroscopic detection of Raman-active features.
  • Reference measurements using germanium.

Main Results:

  • Observation of phonon resonances in YBa(2)Cu(3)O(7) thin films.
  • Coherent interference between phonon resonances and a broad electronic resonance at zero frequency.
  • Generation of characteristic asymmetric spectral features.

Conclusions:

  • The study demonstrates the feasibility of optical driving and spectroscopic detection of Raman-active features.
  • The observed spectral features provide insights into the interplay of electronic and vibrational excitations.
  • This work represents a preliminary step towards advanced nonlinear optical spectroscopy of correlated electron systems.