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

NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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...
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,...

You might also read

Related Articles

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

Sort by
Same author

Steering coherence in quantum dots by carriers injection via tunneling.

Nanophotonics (Berlin, Germany)·2024
Same author

On the relation between electrical and electro-optical properties of tunnelling injection quantum dot lasers.

Nanophotonics (Berlin, Germany)·2024
Same author

Effects of Dislocation Filtering Layers on Optical Properties of Third Telecom Window Emitting InAs/InGaAlAs Quantum Dots Grown on Silicon Substrates.

ACS applied materials & interfaces·2024
Same author

Highly coherent hybrid dual-comb spectrometer.

Optics express·2023
Same author

Imaging the field inside nanophotonic accelerators.

Nature communications·2023
Same author

Imprinting the quantum statistics of photons on free electrons.

Science (New York, N.Y.)·2021
Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026
Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026
Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026
Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026
Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026
Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026
See all related articles

Related Experiment Video

Updated: Jul 4, 2026

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

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Multi-field frequency modulation spectroscopy.

Ido Ben-Aroya1, Matan Kahanov, Gadi Eisenstein

  • 1Electrical Engineering Department, Technion, Haifa 32000, Israel. bido@tx.technion.ac.il

Optics Express
|June 12, 2008
PubMed
Summary
This summary is machine-generated.

This study explores modified FM spectroscopy using multiple modulated electromagnetic fields to probe atomic media. The technique successfully identifies Coherent Population Trapping (CPT) resonances, crucial for laser applications.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Related Experiment Videos

Last Updated: Jul 4, 2026

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

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Area of Science:

  • Atomic physics
  • Spectroscopy
  • Laser physics

Background:

  • Classical FM spectroscopy faces limitations with complex atomic interactions.
  • Probing atomic resonances often requires advanced modulation techniques.
  • Coherent Population Trapping (CPT) is a key phenomenon in atomic physics.

Purpose of the Study:

  • To investigate a modified FM spectroscopy technique utilizing multiple, distinctly modulated electromagnetic fields.
  • To analyze a specific configuration with two phase-opposed, FM-modulated carriers for probing CPT resonances.
  • To validate the technique by comparing theoretical predictions with experimental measurements of CPT characteristics.

Main Methods:

  • Development of a modified FM spectroscopy setup with multiple modulated electromagnetic fields.
  • Theoretical analysis of a two-carrier, phase-opposed FM modulation scheme.
  • Application of a macroscopic model to describe Coherent Population Trapping.
  • Phase-sensitive detection and demodulation of the output signal.

Main Results:

  • The complex spectrum effectively scans multi-photon resonant atomic media.
  • The phase-sensitive detection scheme successfully retrieves spectroscopic features.
  • Theoretical analysis accurately predicts CPT resonance characteristics for the specific modulation configuration.
  • A superb fit was achieved between predicted and measured CPT characteristics.

Conclusions:

  • The modified FM spectroscopy technique is effective for probing atomic media, particularly for CPT resonances.
  • The analyzed two-carrier, phase-opposed modulation configuration is well-suited for CPT studies with directly modulated diode lasers.
  • The macroscopic CPT model provides accurate predictions, validating the spectroscopic approach.