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Area of Science:

  • Solid-state physics
  • Ultrafast spectroscopy
  • Quantum optics

Background:

  • High harmonic generation (HHG) in solids is a key technique for probing electron dynamics and material properties.
  • Quantitative HHG studies necessitate advanced instrumentation for stable fields, precise alignment, and broad spectral detection.

Purpose of the Study:

  • To present an integrated apparatus for high-accuracy, field-strength, and orientation-dependent HHG measurements in bulk solids.
  • To establish a versatile and reliable platform for solid-state HHG spectroscopy.

Main Methods:

  • Engineered an integrated apparatus with dispersion-neutral intensity control for few-cycle pulses.
  • Incorporated a vacuum HHG module with precise sample positioning and an imaging assembly for focal spot stabilization.
  • Utilized a synchronized dual-spectrometer for simultaneous UV/VUV and EUV detection, calibrated via gas-phase attosecond streaking.

Main Results:

  • Demonstrated a system capable of high-accuracy, field-strength, and orientation-dependent HHG measurements.
  • Achieved broadband detection spanning UV to extreme UV (EUV) with precise control and calibration.
  • Established a versatile platform for quantitative solid-state HHG spectroscopy.

Conclusions:

  • The presented apparatus provides a quantitatively reliable platform for solid-state HHG spectroscopy.
  • The methodology is adaptable to various laser sources and materials, supporting advanced electronic structure studies.
  • Enables sub-cycle temporal resolution for tracking strong-field dynamics and reconstructing electronic potentials.