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Related Concept Videos

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
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...
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 Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...

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A Multimodal Wide-Field Fourier-Transform Raman Microscope
06:48

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

A versatile ultrastable platform for optical multidimensional Fourier-transform spectroscopy.

A D Bristow1, D Karaiskaj, X Dai

  • 1JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA.

The Review of Scientific Instruments
|August 7, 2009
PubMed
Summary
This summary is machine-generated.

The JILA multidimensional optical nonlinear spectrometer (JILA-MONSTR) offers a stable platform for advanced coherent optical experiments. It enables detailed analysis of light-matter interactions using multidimensional Fourier-transform spectroscopy.

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Area of Science:

  • Quantum optics
  • Spectroscopy
  • Laser physics

Background:

  • Coherent optical experiments require precise control over laser pulses.
  • Understanding light-matter interactions is crucial in various scientific fields.
  • Existing spectroscopic techniques have limitations in resolving complex interactions.

Purpose of the Study:

  • To introduce the JILA multidimensional optical nonlinear spectrometer (JILA-MONSTR) as a novel platform.
  • To demonstrate its capability in performing advanced spectroscopic measurements.
  • To showcase its versatility in studying light-matter interactions.

Main Methods:

  • Utilizing a robust, ultrastable platform with nested and folded Michelson interferometers.
  • Actively phase-stabilizing the interferometer to generate identical laser pulses with adjustable time delays.
  • Employing multidimensional Fourier-transform spectroscopy for signal detection and analysis.

Main Results:

  • The JILA-MONSTR successfully generates phase-stabilized laser pulses for nonlinear excitation and heterodyne detection.
  • Demonstrated versatility through two-dimensional Fourier-transform spectroscopy experiments.
  • Showcased a phase-cycling scheme for noise reduction and access to two-quantum coherences.

Conclusions:

  • The JILA-MONSTR is a powerful tool for coherent optical experiments, particularly multidimensional spectroscopy.
  • It enables detailed resolution and isolation of coherent contributions in light-matter interactions.
  • The platform's stability and flexibility open new avenues for studying electronic excitations at optical frequencies.