Resonant tunneling diodes strongly coupled to the cavity field

Limbacher, Benedikt; Kainz, Martin A.; Schoenhuber, S.; Wenclawiak, Moritz; Derntl, Christian G.; Andrews, A. M.; Detz, Hermann; Strasser, G.; Schwaighofer, Andreas; Lendl, Bernhard; Darmo, J.; Unterrainer, K.

doi:10.1063/5.0007118

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…The ultrastrong coupling regime, where a sizable number of virtual photons is populating the ground state of the system, has been widely investigated [18][19][20], along with the possibilities to reach this regime with fewer electrons [21][22][23] and its nonadiabatic modulation to emit nonclassical states of light [24,25]. More in line with the present proposal, devices such as amplitude modulators are under development [26,27] and novel approaches to study transport in polaritonic systems are emerging [28,29].…”

mentioning

confidence: 53%

Unified Description of Saturation and Bistability of Intersubband Transitions in the Weak and Strong Light-Matter Coupling Regimes

Jeannin

Manceau²,

Colombelli³

2021

Phys. Rev. Lett.

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We propose a unified description of intersubband absorption saturation for quantum wells inserted in a resonator, both in the weak and strong light-matter coupling regimes. We demonstrate how absorption saturation can be engineered. In particular, we show that the saturation intensity increases linearly with the doping in the strong coupling regime, while it remains doping independent in weak coupling. Hence, countering intuition, the most suitable region to exploit low saturation intensities is not the ultrastrong coupling regime, but is instead at the onset of the strong light-matter coupling. We further derive explicit conditions for the emergence of bistability. This Letter sets the path toward, as yet, nonexistent ultrafast midinfrared semiconductor saturable absorption mirrors (SESAMs) and bistable systems. As an example, we show how to design a midinfrared SESAM with a 3 orders of magnitude reduction in saturation intensity, down to ≈5 kW cm −2 .

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confidence: 53%

Unified Description of Saturation and Bistability of Intersubband Transitions in the Weak and Strong Light-Matter Coupling Regimes

Jeannin

Manceau²,

Colombelli³

2021

Phys. Rev. Lett.

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“…In this case we have a 1D confinement of the quasi-particle in the z direction and free behavior in the other directions. Systems like these are called resonant tunneling diodes [5,6,[50][51][52][53][54], and have been extensively studied experimentally. The modeling of the important properties of electronic transport in these systems is done in a dimension (1D), as for example, along the z axis [7,8].…”

Section: Discretization Of the Schrödinger Equation: Deduction Of The...mentioning

confidence: 99%

Calculation method for the conductance of mesoscopic systems: assembly of Tight Binding Hamiltonians with spin effects—revisited

Silva

Mendoza

2023

J. Phys.: Condens. Matter

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We discretize the Schr"odinger equation in the approximation of the effective mass for the 2DEG of GaAs, without magnetic field and on the other hand, with magnetic field. This discretization leads naturally to Tight Binding Hamiltonians in the approximation of the effective mass. An analysis of this discretization allows us to gain insight into the role of site and hopping energies, which allows us to model the Tight Binding Hamiltonian assembly with spin: Zeeman and spin-orbit coupling effects, especially the case Rashba.With this tool we can assemble Hamiltonians of quantum boxes, Aharanov-Bohm interferometers, anti-dots lattices and effects of imperfections, as well as disorder in the system. The extension to mount quantum billiards is natural. We also explain here how to adapt the recursive equations of Green's functions for the case of spin modes, apart from transverse modes, for the calculation of conductance in these mesoscopic systems. The assembled Hamiltonians allow to identify the matrix elements (depending on the different parameters of the system) associated with splitting or spin flipping, which gives a starting point to model specific systems of interest, manipulating certain parameters. In general, the approach of this work allows us to clearly see the relationship between the wave and matrix description of quantum mechanics. We discuss here also, the extension of the method for 1D and 3D systems, for the extension apart from the first neighbors and for the inclusion of other types of interaction. The way we approach the method, has the objective of showing how specifically the site and hopping energies change in the presence of new interactions. This is very important in the case of spin interactions, because by looking at the matrix elements (site or hopping) we can directly identify the conditions that can lead to splitting, flipping or a mixture of these effects. Which is essential for the design of devices based on spintronics. Finally, we discuss spin-conductance modulation (Rashba spin precession) for the states of an open quantum dot (resonant states). Unlike the case of a quantum wire, the spin-flipping observed in the conductance is not perfectly sinusoidal, there is an envelope that modulates the sinusoidal component, which depends on the discrete-continuous coupling of the resonant states.

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“…Remarkable experimental examples include the manipulating of superconducting critical temperatures with cavities [14] and the modification of chemical reaction rates [15]. Nonetheless, changing the conductivity of solids, the property of primary interest in electronics, has been traditionally deemed implausible even under resonant coupling [16]. Indeed, the momentum an electron acquires in a zero-point vacuum field is much less than thermal or Fermi momentum at achievable temperatures and carrier densities.…”

Section: Introductionmentioning

confidence: 99%

One-dimensional electron localization in semiconductors coupled to electromagnetic cavities

Svintsov,

Alymov,

Devizorova

et al. 2024

Phys. Rev. B

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The electrical conductivity of one-dimensional (1D) disordered solids exhibits exponential decay with respect to their length, a well-known manifestation of the localization phenomenon. In this study, we investigate alterations in the conductivity resulting from the insertion of 1D semiconductors into single-mode electromagnetic cavities, focusing specifically on the regime of nondegenerate doping. Our approach employs the Green's function technique adapted for the nonperturbative consideration of cavity-excited states. This encompasses coherent electron-cavity effects, such as electron motion within the zero-point fluctuating field, as well as incoherent photon emission processes during tunneling. The energy spectrum of electron transmission across the cavity develops Fano-type resonances linked to virtual photon emission, passage along a resonant level, and photon reabsorption. The quality factor of the Fano resonance depends on whether the intermediate state is coupled to the leads, reaching its maximum when this state is deeply localized within the disorder potential. Coupling to the cavity also raises the energies of shallow bound states, bringing them close to the conduction band bottom. This effect results in an enhancement of the conductance at low temperatures.

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Resonant tunneling diodes strongly coupled to the cavity field

Cited by 7 publications

References 24 publications

Unified Description of Saturation and Bistability of Intersubband Transitions in the Weak and Strong Light-Matter Coupling Regimes

Unified Description of Saturation and Bistability of Intersubband Transitions in the Weak and Strong Light-Matter Coupling Regimes

Calculation method for the conductance of mesoscopic systems: assembly of Tight Binding Hamiltonians with spin effects—revisited

One-dimensional electron localization in semiconductors coupled to electromagnetic cavities

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