Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe
arXiv:2404.10582 · doi:10.1103/PhysRevB.110.094303
Abstract
Materials with linear electronic dispersion often feature high carrier mobilities and unusually strong nonlinear optical interactions. In this work, we investigate the THz nonlinear dynamics of one such material, HgCdTe, with an electronic band dispersion heavily dependent on both temperature and stoichiometry. We show how the band gap, carrier concentration and band shape together determine the nonlinear response of the system. At low temperatures, carrier generation from Zener tunneling dominates the nonlinear response with a reduction in the overall transmission. At room temperature, quasi-ballistic electronic dynamics drive the largest observed nonlinear optical interactions, leading to a transmission increase. Our results demonstrate the sensitivity of these nonlinear optical properties of narrow-gap materials to small changes in the electronic dispersion and carrier concentration.
arXiv comment48 pages, 21 figures
References in corpus (19)
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Single-cycle THz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3
- Quantum Hall Effect from the Topological Surface States of Strained Bulk HgTe
- The Rare Two-Dimensional Materials with Dirac Cones
- 3D massless Kane fermions observed in a zinc-blende crystal
- Impact ionization in InSb probed by THz-pump THz-probe spectroscopy
- Half-Heusler Topological Insulators: A First-Principle Study with the Tran-Blaha Modified Becke-Johnson Density Functional
- Petahertz optical response in graphene
- Nonlinear terahertz metamaterials via field-enhanced carrier dynamics in GaAs
- Temperature-driven massless Kane fermions in HgCdTe crystals: verification of universal velocity and rest-mass description
- Extremely Nonperturbative Nonlinearities in GaAs Driven by Atomically Strong Terahertz Fields in Gold Metamaterials
- Self-phase modulation of a single-cycle terahertz pulse by nonlinear free-carrier response in a semiconductor
- 2D THz spectroscopic investigation of ballistic conduction-band electron dynamics in InSb
- Zener Tunneling Breakdown in Phase-Change Materials Revealed by Intense Terahertz Pulses
- High frequency impact ionization and nonlinearity of photocurrent induced by intense terahertz radiation in HgTe-based quantum well structures
- Beyond the effective mass approximation: predictive theory of the nonlinear optical response of conduction electrons
- Disorder-induced topological phase transition in HgCdTe crystals
- Impact ionization in low-band-gap semiconductors driven by ultrafast THz excitation: beyond the ballistic regime
- Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses for high repetition rate, low pulse energy lasers