Related Experiment Video
Updated: Jun 20, 2026

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
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.
- 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.
Related Concept Videos
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
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 Sequences
Super-resolution Fluorescence Microscopy
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Positron Emission Tomography
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
