Terahertz shockwaves generated by a precise subcycle cut of the electric field

Bühler, Johannes; Allerbeck, Jonas; Fitzky, Gabriel; Brida, Daniele; Leitenstorfer, Alfred

doi:10.1364/optica.5.000821

Cited by 15 publications

(3 citation statements)

References 30 publications

(34 reference statements)

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“…Few‐cycle and flexible terahertz pulses were found to be capable of achieving control, ranging from very simple to rather complex pulse shapes and wave forms. As sub‐cycle modulation of terahertz laser pulses is possible with modern setups, the presented theoretical results can have practical implications.…”

Section: Resultsmentioning

confidence: 95%

Theoretical Quantum Control of Fluctuating Molecular Energy Levels in Complex Chemical Environments

Keefer

Vivie‐Riedle

2019

Adv Quantum Tech

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In the present study, quantum control simulations are performed to explore the theoretical and practical limits of controlling applied synthetic chemistry in solution. To this extent a reactive model coordinate is used which captures the essential features of an atomistic and dynamic solvent environment during a picosecond control scenario. The time-resolved influence of a molecular environment is revealed to fluctuate on a time-scale of few hundred femtoseconds. Laser pulse optimizations are performed for different control scenarios, giving general experimental guidelines on how to find a reasonable tradeoff between pulse complexity and population yield. Few-cycle flexible terahertz pulses are found to be capable of handling the complexities which are introduced by a fluctuating environment to the quantum properties of the molecular system. Besides the practical limitations in pulse generation and shaping, there seem to be no theoretical limits to controlling the investigated process with its environmental fluctuations. As the chosen model system involves a methyl group transfer and carbon-carbon formation, it stands representative for other commonly performed synthetic schemes in modern organic and pharmaceutical chemistry.

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Section: Resultsmentioning

confidence: 95%

Theoretical Quantum Control of Fluctuating Molecular Energy Levels in Complex Chemical Environments

Keefer

Vivie‐Riedle

2019

Adv Quantum Tech

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“…The alloy features a bandgap of 0.73 eV, which enables the selective excitation of charge carriers by femtosecond switching pulses with a photon energy of 1.03 eV. As a result, a quasi-metallic THz response can be induced exclusively in the patch, causing a subcycle cut-off 30 of the electric near-field. Numerical calculations show that a photoexcited plasma with an electron-hole pair density of ρ switch = 3.5 × 10 18 cm −3 efficiently expels the near field out of the resonator gap and, thus, deactivates the LC mode (Fig.…”

Section: Non-adiabatic Stripping Of a Cavity Field From Electrons In The Deepmentioning

confidence: 99%

Non-adiabatic stripping of a cavity field from electrons in the deep-strong coupling regime

et al. 2020

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Atomically strong light pulses can drive sub-optical-cycle dynamics. When the Rabi frequency – the rate of energy exchange between light and matter – exceeds the optical carrier frequency, fascinating non-perturbative strong-field phenomena emerge, such as high-harmonic generation and lightwave transport. Here, we explore a related novel subcycle regime of ultimately strong light-matter interaction without a coherent driving field. We use the vacuum fluctuations of nanoantennas to drive cyclotron resonances of two-dimensional electron gases to vacuum Rabi frequencies exceeding the carrier frequency. Femtosecond photoactivation of a switch element inside the cavity disrupts this ‘deep-strong coupling’ more than an order of magnitude faster than the oscillation cycle of light. The abrupt modification of the vacuum ground state causes spectrally broadband polarisation oscillations confirmed by our quantum model. In the future, this subcycle shaping of hybrid quantum states may trigger cavity-induced quantum chemistry, vacuum-modified transport, or cavity-controlled superconductivity, opening new scenarios for non-adiabatic quantum optics.

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“…ntense terahertz (THz) wave generation, based on the nonlinear wavelength conversion approach, has revealed various physical phenomena in the THz region, such as the Higgs mode in superconductors, nanoscale crystal growth, and shockwave generation. [1][2][3] Nonlinear crystals (NLCs), 4) gases, 5) and liquids 6) have been studied as potential sources for generating intense THz-wave radiation. THz-wave sources, which are based on nonlinear wavelength conversion, generally have high coherency and frequency tunability.…”

mentioning

confidence: 99%

Characteristics of nonlinear terahertz-wave radiation generated by mid-infrared femtosecond pulse laser excitation

Shibuya

Nawata

Nakajima

et al. 2021

Appl. Phys. Express

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We report on efficient terahertz-wave generation in organic and inorganic crystals by nonlinear wavelength conversion approach using a 3.3 μm femtosecond pulse laser. Experimental results reveal the relation between pump power and terahertz-wave output power, which is proportional to the square of the pump power at the range of mega- to tera-watt cm−2 class even if the pump wavelength is different. Damage threshold of organic and inorganic crystals are recorded 0.6 and 18 tera-watt cm−2 by reducing several undesirable nonlinear optical effects using mid-infrared source.

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Terahertz shockwaves generated by a precise subcycle cut of the electric field

Cited by 15 publications

References 30 publications

Theoretical Quantum Control of Fluctuating Molecular Energy Levels in Complex Chemical Environments

Theoretical Quantum Control of Fluctuating Molecular Energy Levels in Complex Chemical Environments

Non-adiabatic stripping of a cavity field from electrons in the deep-strong coupling regime

Characteristics of nonlinear terahertz-wave radiation generated by mid-infrared femtosecond pulse laser excitation

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