Extreme lightwave electron field emission from a nanotip

Matte, Dominique; Chamanara, Nima; Gingras, Lauren; Cotret, Laurent P. René de; Britt, Tristan; Siwick, Bradley J.; Cooke, David G.

doi:10.1103/physrevresearch.3.013137

Cited by 15 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yet, we anticipate that they are adaptable to lightwave-driven STM at higher frequencies [10,42] for experimental parameters when this is the case. The algorithms should be similarly applicable to other experimental geometries in which strong-field coherent control of current is read out through rectified charge [43][44][45][46][47][48][49]. In the interest of clear communication between research fields, we note that for light coupled to a sharp tip near a surface, the geometric asymmetry is sometimes considered in terms of an asymmetric field enhancement that results in an asymmetric near-field waveform and nonzero temporal integral.…”

Section: Discussionmentioning

confidence: 99%

Algorithm for subcycle terahertz scanning tunneling spectroscopy

et al. 2022

View full text Add to dashboard Cite

Terahertz scanning tunneling microscopy (THz-STM) enables ultrafast measurements of surfaces, single molecules, and nanostructures with simultaneous sub-picosecond temporal resolution and atomic spatial resolution. In pump-probe THz-STM experiments employing femtosecond optical pump pulses, lightwave-driven tunneling by a time-delayed THz probe pulse accesses the evolving differential conductance of the tunnel junction following photoexcitation. However, a general theoretical approach to extract the time-and voltage-dependent differential conductance from THz-STM measurements is lacking. Here, we introduce an algorithm for pump-probe THz scanning tunneling spectroscopy (THz-STS) analysis. Our approach allows us to reliably reconstruct the tunnel junctions differential conductance in steady-state or time-dependent scenarios from simulated THz-STS data. The algorithm achieves subcycle time resolution, which we demonstrate by retrieving dynamics faster than the bandwidth of the input THz voltage transient. Subcycle THz-STS will make lightwave-driven microscopy yet more powerful as a tool for characterizing ångström-scale ultrafast dynamics in novel materials.

show abstract

Section: Discussionmentioning

confidence: 99%

Algorithm for subcycle terahertz scanning tunneling spectroscopy

et al. 2022

View full text Add to dashboard Cite

show abstract

“…THz-driven electron field emission was reported up to across a split-gap dipole antenna 23 and from metallic microantenna 24 , where THz-driven electron acceleration, nitrogen plasma generation, and UV emission were described 24 . Electron energies exceeding 5 keV 25 and bunch charges of electrons per pulse 26 were observed from THz-driven metallic nanotips 27 . Electron emission driven by strong-field single-cycle THz waveforms was predicted to be confined to a single burst 25 , however, a direct experimental demonstration is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Subcycle surface electron emission driven by strong-field terahertz waveforms

Li,

Sharma,

Márton

et al. 2023

Nat Commun

View full text Add to dashboard Cite

The advent of intense terahertz (THz) sources opened a new era when the demonstration of the acceleration and manipulation of free electrons by THz pulses became within reach. THz-field-driven electron emission was predicted to be confined to a single burst due to the single-cycle waveform. Here we demonstrate the confinement of single-cycle THz-waveform-driven electron emission to one of the two half cycles from a solid surface emitter. Either the leading or the trailing half cycle was active, controlled by reversing the field polarity. THz-driven single-burst surface electron emission sources, which do not rely on field-enhancement structures, will impact the development of THz-powered electron acceleration and manipulation devices, all-THz compact electron sources, THz waveguides and telecommunication, THz-field-based measurement techniques and solid-state devices.

show abstract

Ultra‐Low Threshold Resonance Switching by Terahertz Field Enhancement‐Induced Nanobridge

Lee,

Kim,

Roh

et al. 2024

Advanced Science

View full text Add to dashboard Cite

Ongoing efforts spanning decades aim to enhance the efficiency of optical devices, highlighting the need for a pioneering approach in the development of next‐generation components over a broad range of electromagnetic wave spectra. The nonlinear transport of photoexcited carriers in semiconductors at low photon energies is crucial to advancements in semiconductor technology, communication, sensing, and various other fields. In this study, ultra‐low threshold resonance mode switching by strong nonlinear carrier transport beyond the semi‐classical Boltzmann transport regime using terahertz (THz) electromagnetic waves are demonstrated, whose energy is thousands of times smaller than the bandgap. This is achieved by employing elaborately fabricated 3D tip structures at the nanoscale, and nonlinear effects are directly observed with the THz resonance mode switching. The nanotip structure intensively localizes the THz field and amplifies it by more than ten thousand times, leading to the first observation of carrier multiplication phenomena in these low‐intensity THz fields. This experimental findings, confirmed by concrete calculations, shed light on the newly discovered nonlinear behavior of THz fields and their strong interactions with nanoscale structures, with potential implications and insights for advanced THz technologies beyond the quantum regime.

show abstract

Extreme lightwave electron field emission from a nanotip

Cited by 15 publications

References 34 publications

Algorithm for subcycle terahertz scanning tunneling spectroscopy

Algorithm for subcycle terahertz scanning tunneling spectroscopy

Subcycle surface electron emission driven by strong-field terahertz waveforms

Ultra‐Low Threshold Resonance Switching by Terahertz Field Enhancement‐Induced Nanobridge

Contact Info

Product

Resources

About