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Related Concept Videos

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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.
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

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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
Positron Emission Tomography01:29

Positron Emission Tomography

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Related Experiment Video

Updated: Jun 20, 2026

In vivo Imaging of Biological Tissues with Combined Two-Photon Fluorescence and Stimulated Raman Scattering Microscopy
09:06

In vivo Imaging of Biological Tissues with Combined Two-Photon Fluorescence and Stimulated Raman Scattering Microscopy

Published on: December 20, 2021

Spectrally programmed stimulated photon echo.

M Mitsunaga, R Yano, N Uesugi

    Optics Letters
    |September 24, 2009
    PubMed
    Summary

    Researchers observed stimulated photon echoes from modulated media using a cryogenic Europium-doped YAlO(3) sample. This technique allows for novel optical memory by shaping transient optical pulses via frequency programming.

    Area of Science:

    • Solid-state physics
    • Quantum optics
    • Materials science

    Background:

    • Inhomogeneous broadening in solids limits optical information storage.
    • Photon echoes are coherent optical transients used for studying material properties.
    • Artificial modulation of spectral distributions offers new possibilities for optical control.

    Purpose of the Study:

    • To observe stimulated photon echoes from an artificially modulated inhomogeneous medium.
    • To demonstrate the potential for creating novel optical memory devices.
    • To explore frequency-domain programming for transient pulse shaping.

    Main Methods:

    • Utilized a cryogenic Europium-doped Yttrium Aluminum Perovskite (Eu3+:YAlO3) sample with a long quasi-persistent hole lifetime.
    • Employed a frequency-scanned and intensity-modulated continuous-wave (cw) laser for multiple hole burning.

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    Last Updated: Jun 20, 2026

    In vivo Imaging of Biological Tissues with Combined Two-Photon Fluorescence and Stimulated Raman Scattering Microscopy
    09:06

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    Published on: December 20, 2021

    Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering
    09:13

    Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering

    Published on: July 6, 2019

  • Triggered the sample with a pulsed laser to generate a coherent burst (stimulated photon echo).

    • Main Results:

    • Successfully observed stimulated photon echoes from the modulated Eu3+:YAlO3 sample.
    • Demonstrated that arbitrary transient pulse shapes can be generated through frequency-domain programming.
    • Confirmed the coherent burst is equivalent to a stimulated photon echo.

    Conclusions:

    • Artificial modulation of spectral distributions enables the generation of stimulated photon echoes.
    • Frequency-domain programming offers a versatile method for controlling optical pulse shapes.
    • This technique paves the way for developing advanced optical memory systems.