Broadband terahertz generation via the interface inverse Rashba-Edelstein effect

Abstract

Novel mechanisms for electromagnetic wave emission in the terahertz (THz) frequency regime emerging at the nanometer scale have recently attracted intense attention for the purpose of searching next-generation broadband THz emitters. Here, we report a new mechanism for broadband THz emission, utilizing the interface inverse Rashba-Edelstein effect. By engineering the symmetry of the Ag/Bi Rashba interface, we demonstrate a controllable THz radiation (~0.1-5 THz) waveform emitted from metallic Fe/Ag/Bi heterostructures following photo-excitation. We further reveal that this type of THz radiation can be selectively superimposed on the emission discovered recently due to the inverse Spin Hall effect, yielding a unique film thickness dependent emission pattern. Our results thus offer new opportunities for versatile broadband THz radiation using the interface quantum effects.

References in corpus (20)

• Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
• Single-cycle THz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3
• Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
• Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
• Quantifying spin Hall angles from spin pumping: Experiments and Theory
• Engineering ultrafast spin currents and terahertz transients by magnetic heterostructures
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
• Scaling of spin Hall angle in 3d, 4d and 5d metals from Y3Fe5O12/metal spin pumping
• Intrinsic spin Hall effect in platinum metal
• Perspective: Ultrafast magnetism and THz spintronics
• Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys
• Femtosecond control of electric currents at the interfaces of metallic ferromagnetic heterostructures
• Powerful and Tunable THz Emitters Based on the Fe/Pt Magnetic Heterostructure
• Optimized Spintronic Terahertz Emitters Based on Epitaxial Grown Fe/Pt Layer Structures
• Spin Hall Angle Quantification from Spin Pumping and Microwave Photoresistance
• Rashba-Edelstein Magnetoresistance in Metallic Heterostructure
• Enhanced spin-orbit torque via modulation of spin current absorption
• Origin of inverse Rashba-Edelstein effect at Cu/Bi interface using lateral spin valves
• Measurement of spin pumping voltage separated from extrinsic microwave effects

Cited by in corpus (35)

• Roadmap of spin-orbit torques
• Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
• Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
• Highly-efficient spintronic terahertz emitter enabled by metal-dielectric photonic crystal
• Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy
• Principles of spintronic THz emitters
• Terahertz emission from anomalous Hall effect in a single-layer ferromagnet
• Modification of spintronic terahertz emitter performance through defect engineering
• Ultrafast THz probing of nonlocal orbital current in transverse multilayer metallic heterostructures
• Broadband terahertz probes of anisotropic magnetoresistance disentangle extrinsic and intrinsic contributions
• Ultrafast spin-charge conversion at SnBi${}_2$Te${}_4$/Co topological insulator interfaces probed by terahertz emission spectroscopy
• Transition of laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport
• Large spin-to-charge conversion at the two-dimensional interface of transition metal dichalcogenides and permalloy
• Terahertz Emission From an Exchange-Coupled Synthetic Antiferromagnet
• Orbital Rashba effect as a platform for robust orbital photocurrents
• Spin-voltage-driven efficient terahertz spin currents from the magnetic Weyl semimetals Co${}_2$MnGa and Co${}_2$MnAl
• Impact of gigahertz and terahertz transport regimes on spin propagation and conversion in the antiferromagnet IrMn
• Nonrelativistic and nonmagnetic control of terahertz charge currents via electrical anisotropy in RuO2 and IrO2
• Accessing ultrafast spin-transport dynamics in copper using broadband terahertz spectroscopy
• Modelling of Spintronic Terahertz Emitters as a function of spin generation and diffusion geometry
• Nonreciprocal Amplification Transition in a Driven-Dissipative Quantum Network
• Spin to charge conversion at Rashba-split SrTiO${}_3$ interfaces from resonant tunneling
• Evidence of Ultrashort Orbital Transport in Heavy Metals Revealed by Terahertz Emission Spectroscopy
• Controlling polarization of spintronic THz emitter by remanent magnetization texture
• Laser-induced charge and spin photocurrents at BiAg${}_2$ surface: a first principles benchmark
• Inverse Rashba-Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems
• Revealing subterahertz atomic vibrations in quantum paraelectrics by surface-sensitive spintronic terahertz spectroscopy
• Comparative Analysis of THz Signal Emission from SiO${}_2$/CoFeB/Metal Heterostructures: Wideband and High-Frequency THz Signal Advantage of PtBi-based Emitter
• Enhanced laser-induced single-cycle terahertz generation in a spintronic emitter with a gradient interface
• Theory of charge-to-spin conversion under quantum confinement
• Unified Model for a Nonlinear Pulse Propagation in Composites and Optimization of THz Generation
• Enhancement of Spintronic Terahertz Emission via Annealing in Ferromagnetic Heterostructures
• Femtosecond control of terahertz spin-charge conversion in ferromagnetic heterostructures
• Charge-to-spin conversion in epitaxial and polycrystalline Bi and Bi/Ag layers
• Optimizing spin-based terahertz emission from magnetic heterostructures