Bloch Oscillations in Superlattices: The Problem of a Terahertz Oscillator

Romanov, Yu. A.; Romanova, Yu. Yu.

doi:10.1134/1.1852666

Cited by 23 publications

(15 citation statements)

References 8 publications

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“…The proposed applications include microwave radiation (the so-called Bloch oscillator systems [1,2,3]), matter-wave interferometry [4] and operational qubits for quantum computing [5]. A better understanding of fundamental types of carrier behaviour in biased superlattices is essential for making further progress in this field.…”

Section: Introductionmentioning

confidence: 99%

Interminiband Rabi oscillations in biased semiconductor superlattices

Abumov

Sprung

2007

Phys. Rev. B

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Carrier dynamics at energy level anticrossings in biased semiconductor superlattices, was studied in the time domain by solving the time-dependent Schrödinger equation. The resonant nature of interminiband Rabi oscillations has been explicitly demonstrated to arise from interference of intrawell and Bloch oscillations. We also report a simulation of direct Rabi oscillations across three minibands, in the high field regime, due to interaction between three strongly coupled minibands.

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Section: Introductionmentioning

confidence: 99%

Interminiband Rabi oscillations in biased semiconductor superlattices

Abumov

Sprung

2007

Phys. Rev. B

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“…Let us start from the brief discussion of the known properties (see Refs. [4,10,13] and references wherein) of the ac BOs and DL of electrons in the SLs having arbitrary miniband dispersion law, Eq. ( 2), in the time-dependent electric field given by…”

Section: Ac Bloch Oscillations and Dynamical Localization Of Electron...mentioning

confidence: 99%

“…It should be noted that the BOs are harmonic in the nearest-neighbor approximation only, but in general case, eachν-th partial miniband creates the harmonics with frequency νΩ с . This anharmonicity of BOs plays extremely important role for THz Bloch generators [4].…”

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confidence: 99%

Electron Bloch oscillations and electromagnetic transparency of semiconductor superlattices in multi-frequency electric fields

2009

Self Cite

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We examine phenomenon of electromagnetic transparency in semiconductor superlattices (having various miniband dispersion laws) in the presence of multi-frequency periodic and nonperiodic electric fields. Effects of induced transparency and spontaneous generation of static fields are discussed. We paid a special attention on a self-induced electromagnetic transparency and its correlation to dynamic electron localization. Processes and mechanisms of the transparency formation, collapse, and stabilization in the presence of external fields are studied.In particular, we present the numerical results of the time evolution of the superlattice current in an external biharmonic field showing main channels of transparency collapse and its partial stabilization in the case of low electron density superlattices.

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“…QCL emission stems from intersubband optical transitions, in contrast with the mechanisms underlying high-order harmonic generation (HHG) in SSLMs, which we briefly summarize next. When an SSLM is biased, an input oscillating field can modulate the Bloch oscillations giving rise to HHG [ 29 , 30 , 31 , 32 ]. This nonlinear emission from the SSLM can be strongly affected by the involvement of electric field domains [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices

Pereira

Apostolakis

2021

Nanomaterials

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Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of superlattice multipliers in a range of input frequencies and powers delivered by commercially available GHz sources. We show that the strongly nonlinear behavior can lead to a very complex scenario. Furthermore, it is natural to ask what happens when we combine both asymmetry and voltage control effects. This question is answered by the simulations presented in this study. The efficiency of high-order even harmonics is increased by the combined effects. Furthermore, the development of ‘petals’ in high-order emission is shown to be more easily achieved, opening the possibility to very interesting fundamental physics studies and more efficient devices for the GHz–THz range.

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Bloch Oscillations in Superlattices: The Problem of a Terahertz Oscillator

Cited by 23 publications

References 8 publications

Interminiband Rabi oscillations in biased semiconductor superlattices

Interminiband Rabi oscillations in biased semiconductor superlattices

Electron Bloch oscillations and electromagnetic transparency of semiconductor superlattices in multi-frequency electric fields

Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices

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