The Electron–Hole Plasma in a Strong Electromagnetic Field. Optical Properties in a Simplified Model

Harbich, Thomas; Mahler, G.

doi:10.1002/pssb.2221040119

Cited by 22 publications

(3 citation statements)

References 4 publications

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“…These states have a quasienergy, which is only well defined modulo hω Stark . 17,18 In our case, this leads to a repetition of the bare states |0 and |1 at the energies E i +nhω Stark . Two of these states additional to the three levels discussed above are marked in Fig.…”

Section: Dynamics In the Presence Of A Stark Pulsementioning

confidence: 82%

Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot

2013

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The optically induced spin dynamics of a single Mn atom embedded into a single semiconductor quantum dot can be strongly influenced by using the optical Stark effect. The exchange interaction gives rise to simultaneous spin flips between the quantum dot electron and Mn. In the time domain these flips correspond to exchange induced Rabi oscillations, which are typically off-resonant. By applying a detuned laser pulse, the states involved in the flipping can be brought into resonance by means of the optical Stark effect increasing the amplitude of the Rabi oscillations to one. In this paper we study theoretically how this spin dynamics can be monitored in time-resolved spectroscopy. In the spectrum the exchange interaction leads to a splitting of the exciton line into six lines, each corresponding to one of the six Mn spin states. The dynamical behavior of the Mn spin is reflected by the strength of the individual lines as a function of time. When an off-resonant optical pulse is applied the spectral positions of the lines shift, but still the flipping dynamics is visible.

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Section: Dynamics In the Presence Of A Stark Pulsementioning

confidence: 82%

Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot

2013

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“…The optical transitions in this system are indicated by arrows. Note that in systems with a periodic driving the energies are quasi-energies modulo ω L [25,26]. Therefore in the dressed state picture four levels are shown in Fig.…”

Section: A Hamiltonian In the Bare And Dressed State Basismentioning

confidence: 99%

Time-resolved pump-probe signals of a continuously driven quantum dot affected by phonons

Reiter¹

2017

Phys. Rev. B

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The interaction of a light field with a quantum-mechanical system can be studied in an optically controlled semiconductor quantum dot. When driven by a continuous light field switched on instantaneously, the quantum dot occupation performs Rabi oscillations. Unlike an atomic system, the quantum dot is coupled to phonons, which leads to a damping of the Rabi oscillations. Here we model the time-resolved probe spectra to monitor these dynamics and study the influence of phonons on the spectra. The spectra consist of up to three peaks, similar to the Mollow-triplet known from quantum optics. We develop analytical equations within a rate equation model and show that they agree excellently with a numerical solution using a well established correlation expansion approach.

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“…Neglecting spontaneous processes in this theory the stationary state is described by a Fermi sea filled up t o a level which is directly given by the photon energy. Therefore, in the interactionless case and for frequencies above the gap there is only an insignificant dependence of the electron-hole density on the strength of the radiation [4] caused by a modification of the particle distribution close to the Fernii surface. Within this model for a frequency below the gap only a sniall number of electron-hole pairs is excited with the help of anharmonic processes.…”

Section: Introductionmentioning

confidence: 96%

Bistability of the Electron‐Hole Plasma Density in a Strong Electromagnetic Field

Harbich¹,

Mahler²

1983

Physica Status Solidi (b)

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Differing from the usual treatment of an electron-hole plasma in quasi-thermal equilibrium, where the particle density is kept constant, a plasma is considered with a fixed chemical potential. Such a situation is expected to be realistic for semiconductors with a direct gap in the presence of a strong monochromatic electromagnetic field. The appearance of a bistability in the plasma density is predicted for photon energies in the vicinity of the gap.I m Unterschied ziir ublichen Behandlung von Elektron-Loch-Plasmen im quasi-thermischen Gleichgewicht, bei der die Teilchendichte konstant gehalten wird, wird ein Plasma mit festem chemischen Potential betrachtet. Es wird angenommen, dab eine derartige Situation realistisch ist fur einen Halbleiter mit direkter Bandliicke in Anwesenheit eines starken elektromsgnetischen Feldes. Das Auftreten einer Plasmadichte-Bistabilitat fur Photonenenergien in der Nahe der Bandlucke wird vorausgesagt.

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The Electron–Hole Plasma in a Strong Electromagnetic Field. Optical Properties in a Simplified Model

Cited by 22 publications

References 4 publications

Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot

Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot

Time-resolved pump-probe signals of a continuously driven quantum dot affected by phonons

Bistability of the Electron‐Hole Plasma Density in a Strong Electromagnetic Field

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