Zeno-logic applications of semiconductor quantum dots

Schneebeli, L.; Feldtmann, T.; Kira, M.; Koch, S. W.; Peyghambarian, N.

doi:10.1103/physreva.81.053852

Cited by 13 publications

(13 citation statements)

References 18 publications

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“…This includes studies of the spatiotemporal dynamics and SIT mode‐locking in QD lasers, FDTD‐based MB simulations of QD photonic‐crystal‐cavity lasers, and QDs coupled to a nanoparticle or cavity . Furthermore, three‐level MB equations have been used, for example, to study EIT, soliton propagation, or all‐optical switching in QD structures, and also four‐level models have been developed …”

Section: Application To Optoelectronic Devicesmentioning

confidence: 91%

“…Within this model, the dissipation terms in Equation are substituted by the more general ansatz for incoherent processes

{([], \partial_{t}, ρ_{α, i}^{s})}_{inc} = {([], \partial_{t}, ρ_{α, i}^{s})}_{intra} - \sum_{j} A_{cv, i j}^{s} ρ_{α, i}^{s} ρ_{β \neq α, j}^{s}

with the spontaneous recombination coefficient

A_{cv, i j}^{s}

. The Lindblad dephasing rate approach of the form Equation , as also used in Equation , has been argued to be generally well suited to model dephasing in QDs . The dephasing rates can be calculated based on microscopic models for carrier–carrier and carrier–phonon scattering, or are phenomenologically chosen …”

Section: Application To Optoelectronic Devicesmentioning

confidence: 99%

“…The Lindblad dephasing rate approach of the form Equation , as also used in Equation , has been argued to be generally well suited to model dephasing in QDs . The dephasing rates can be calculated based on microscopic models for carrier–carrier and carrier–phonon scattering, or are phenomenologically chosen …”

Section: Application To Optoelectronic Devicesmentioning

confidence: 99%

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Optoelectronic Device Simulations Based on Macroscopic Maxwell–Bloch Equations

Jirauschek

Riesch

Tzenov

2019

Advcd Theory and Sims

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Due to their intuitiveness, flexibility, and relative numerical efficiency, the macroscopic Maxwell-Bloch (MB) equations are a widely used semiclassical and semi-phenomenological model to describe optical propagation and coherent light-matter interaction in media consisting of discrete-level quantum systems. This review focuses on the application of this model to advanced optoelectronic devices, such as quantum cascade and quantum dot lasers. The Bloch equations are here treated as a density matrix model for driven quantum systems with two or multiple discrete energy levels, where dissipation is included by Lindblad terms. Furthermore, the 1D MB equations for semiconductor waveguide structures and optical fibers are rigorously derived. Special analytical solutions and suitable numerical methods are presented. Due to the importance of the MB equations in computational electrodynamics, an emphasis is placed on the comparison of different numerical schemes, both with and without the rotating wave approximation. The implementation of additional effects which can become relevant in semiconductor structures, such as spatial hole burning, inhomogeneous broadening, and local-field corrections, is discussed. Finally, links to microscopic models and suitable extensions of the Lindblad formalism are briefly addressed. of a lower bandgap material than the adjacent layers, which restricts the free electron motion in that layer to the in-plane directions and gives rise to quantized energy states in growth direction. As a consequence of the further restriction of the energy spectrum and the even stronger carrier localization, additional improvement can be expected from 2D or 3D confinement, resulting in quantum wire/dash and quantum dot (QD) structures, respectively. Indeed, QD [1][2][3] and quantum dash [4] lasers and laser amplifiers have been shown to exhibit excellent characteristics. In Figure 1, the formation of quantized states in quantum wells, wires, and dots is schematically illustrated. The term quantum dash refers to an elongated nanostructure, that is, some kind of short quantum wire. By contrast, the term nanowire does not necessarily indicate strong quantum confinement. For example, in nanowire lasers, the nanowire geometry typically serves as a single-mode optical waveguide resonator, while the active region is based on a heterostructure or quantum well, as in a conventional laser diode. [5,6] Semiconductor optoelectronic devices usually rely on electron-hole recombination, that is, optical transitions between conduction and valence band states. The associated resonance wavelength is largely determined by the semiconductor bandgap, which establishes a lower bound on the transition energy. Thus, the coverage of a certain spectral region depends on the existence of suitable semiconductor materials, which for example restricts the availability of practical optoelectronic sources and detectors in the mid-infrared and terahertz regions. An alternative concept is based on intersubband devices, which employ so-called i...

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Section: Application To Optoelectronic Devicesmentioning

confidence: 91%

“…Within this model, the dissipation terms in Equation are substituted by the more general ansatz for incoherent processes

{([], \partial_{t}, ρ_{α, i}^{s})}_{inc} = {([], \partial_{t}, ρ_{α, i}^{s})}_{intra} - \sum_{j} A_{cv, i j}^{s} ρ_{α, i}^{s} ρ_{β \neq α, j}^{s}

with the spontaneous recombination coefficient

A_{cv, i j}^{s}

Section: Application To Optoelectronic Devicesmentioning

confidence: 99%

See 1 more Smart Citation

Optoelectronic Device Simulations Based on Macroscopic Maxwell–Bloch Equations

Jirauschek

Riesch

Tzenov

2019

Advcd Theory and Sims

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“…Analogs of the quantum Zeno effect have been described for all-optical switching based on ND-2PA in rubidium atomic vapor [4] as well as in CdSe-based semiconductor quantum dots. [5] In both cases, the presence of the control and signal beam creates optical loss that "spoils" the critical coupling of microresonators or the quality factor of a cavity such that the signal beam is re-routed or redirected. For such processes to occur with minimal energy dissipation in the switching event, it is essential that the ND-2PA coefficient be larger than the degenerate 2PA (D-2PA) coefficient at both the control and signal frequencies.…”

Section: Introductionmentioning

confidence: 99%

Organic Materials for Zeno-Based Optical Switching

Hales

Matichak

Lin

et al. 2011

CLEO:2011 - Laser Applications to Photonic Applications

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“…Hence implementations of two-photon quantum protocols in integrated solid state device architectures are being enabled. For example, Zeno-type conditional coherent logic down to the single photon level becomes feasible in a monolithic nanoscale system [19][20][21][22] . Furthermore, charge redistribution or removal could be used to tune the lifetime of the optically-induced entangled state or to convert the optical entanglement into a hybrid or pure particle entanglement, resulting in potential quantum memory technology for single and entangled photons 14,[23][24][25][26][27] as well as opening additional paths for spin-photon entanglement 28,29 .…”

mentioning

confidence: 99%