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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

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Recent Development of Ultrafast Optical Characterizations for Quantum Materials.

Tao Dong¹, Si-Jie Zhang¹, Nan-Lin Wang^1,2,3

¹International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China.

Advanced Materials (Deerfield Beach, Fla.)

|July 19, 2022

Summary

Intense ultrashort optical pulses enable new quantum material studies. Ultrafast spectroscopy reveals novel phenomena and properties, particularly in superconductors, advancing condensed matter physics.

Keywords:

optical manipulation pump-probe spectroscopy quantum materials superconductivity terahertz spectroscopy

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Area of Science:

Condensed Matter Physics
Quantum Materials Science
Ultrafast Spectroscopy

Background:

Intense ultrashort optical pulses (terahertz to visible) drive quantum material research.
Nonadiabatic steering of quantum materials induces novel, non-equilibrium phases.
Ultrafast time-resolved optical techniques are crucial for characterizing nonequilibrium and nonlinear properties of solids.

Purpose of the Study:

To review recent advancements in ultrafast optical techniques for quantum materials.
To highlight applications in detecting and manipulating physical properties.
To discuss new developments in time-resolved terahertz spectroscopy for superconductors.

Main Methods:

Generation of intense ultrashort optical pulses.
Application of ultrafast time-resolved optical spectroscopy.
Utilizing time-resolved terahertz spectroscopy for superconductor studies.

Main Results:

Demonstration of nonadiabatic steering of quantum materials.
Characterization of novel, non-equilibrium quantum phases.
Advancements in detecting the Higgs mode and photoinduced nonequilibrium response in superconductors.

Conclusions:

Ultrafast optical techniques provide powerful tools for exploring quantum materials.
New spectroscopic methods reveal hidden properties and dynamics.
Significant progress in understanding superconductors through nonequilibrium studies.