2D THz spectroscopic investigation of ballistic conduction-band electron dynamics in InSb

Abstract

Using reflective cross-polarized 2D THz time-domain spectroscopy in the range of 1-12 THz, we follow the trajectory of the out-of-equilibrium electron population in the low-bandgap semiconductor InSb. The 2D THz spectra show a set of distinct features at combinations of the plasma-edge and vibration frequencies. Using finite difference time domain simulations combined with a tight binding model of the band structure, we assign these features to electronic nonlinearities and show that the nonlinear response in the first picoseconds is dominated by coherent ballistic motion of the electrons. We demonstrate that this technique can be used to investigate the landscape of the band curvature near the Gamma-point as illustrated by the observation of anisotropy in the (100)-plane.

References in corpus (3)

• Impact ionization in InSb probed by THz-pump THz-probe spectroscopy
• Non-perturbative Interband Response of InSb Driven Off-resonantly by Few-cycle Electromagnetic Transients
• Beyond the effective mass approximation: predictive theory of the nonlinear optical response of conduction electrons

Cited by in corpus (12)

• Two-Dimensional Terahertz Spectroscopy of Condensed-Phase Molecular Systems
• A new standard in high-field terahertz generation: the organic nonlinear optical crystal PNPA
• Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
• Enabling High-Power, Broadband THz Generation with 800-nm Pump Wavelength
• Probing Inhomogeneous Cuprate Superconductivity by Terahertz Josephson Echo Spectroscopy
• Multidimensional Terahertz Probes of Quantum Materials
• Terahertz stimulated parametric downconversion of a magnon mode in an antiferromagnet
• Impact ionization in low-band-gap semiconductors driven by ultrafast THz excitation: beyond the ballistic regime
• Unlocking Quantum Control and Multi-Order Correlations via Terahertz Two-Dimensional Coherent Spectroscopy
• Excitation-Dependent Features and Artifacts in 2-D Terahertz Spectroscopy
• Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe
• Amplitude mode in a multi-gap superconductor MgB${}_2$ investigated by terahertz two-dimensional coherent spectroscopy