Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Quantum Interference in a Room Temperature InAs/InP Quantum Dot Semiconductor Optical Amplifier

Igor Khanonkin, Akhilesh Kumar Mishra, Ouri Karni, Johann Peter Reithmaier, G. Eisenstein

Published Jan 1, 2018• 0 citations
Publisher

Abstract

Ramsey interference were observed in an inhomogeneously broadened InAs/InP quantum dot semiconductor optical amplifier operating at room temperature. The imprint of the Ramsey fringes on pulse intensity, phase and temporal position were demonstrated.
DOI
10.1364/cleo_qels.2018.fth1h.6

Related papers

Ramsey fringes in a room-temperature quantum-dot semiconductor optical amplifier

Igor Khanonkin, Akhilesh Kumar Mishra, Ouri Karni +6 more

Ramsey interference that enables careful control over quantum states is demonstrated here in an inhomogeneously broadened ensemble of quantum dots, which serve as the gain medium of a semiconductor waveguide operating at room temperature. A subfemtosecond-resolution pump-probe scheme reveals a clear oscillatory behavior of the amplitude and instantaneous frequency of the probe pulse. A unique phenomenon is also observed, whereby the temporal position of the output probe pulse also oscillates with the same periodicity. The latter cannot be observed in single-dot systems since it results from the distributed nature of the amplifier.

arXiv:1708.06254•Physical review. B./Physical review. B•Jun 26, 2018•7 citations

Quantum optics in room temperature quantum dot ensembles

G. Eisenstein

The use of ultrashort pulses allows to induce and observe quantum coherent effects in optical gain media where the coherence time is longer than the excitation pulses namely, room temperature quantum dot ensembles. We use InAs/InP quantum dot optical amplifiers as the experimental platform and have demonstrated effects such as coherently controlled Rabi Oscillations, Ramsey Fringes, Photon`Echoes, Prolongation of dephasing time via induced three pulse photon echoes. Recently we have advanced the field by demonstrating a hallmark experiment of quantum optics: Quantum Coherent collapse and revival which was never observed in a solid let alone at room temperature.

Semiconductor Lasers and Laser Dynamics•May 25, 2022•0 citations

Rabi oscillations and self-induced transparency in InAs/InP quantum dot semiconductor optical amplifier operating at room temperature

Ouri Karni, Amir Capua, G. Eisenstein +3 more

We report direct observations of Rabi oscillations and self-induced transparency in a quantum dot optical amplifier operating at room temperature. The experiments make use of pulses whose durations are shorter than the coherence time which are characterized using Cross-Frequency-Resolved Optical Gating. A numerical model which solves the Maxwell and Schrödinger equations and accounts for the inhomogeneously broadened nature of the quantum dot gain medium confirms the experimental results. The model is also used to explain the relationship between the observability of Rabi oscillations, the pulse duration and the homogeneous and inhomogeneous spectral widths of the semiconductor.

Optics Express•Oct 29, 2013•38 citations

Coherent light matter interactions in nanostructure based active semiconductor waveguides operating at room temperature

G. Eisenstein, Johann Peter Reithmaier, Amir Capua +4 more

Light matter coherent interactions require that the coherent state induced in the matter be maintained for the duration of the observation. The only way to induce and observe such interactions in room temperature semiconductors, where the coherence time is of the order of a few hundred femtoseconds, is to use ultrashort pulse excitations and an ultrafast characterization technique. For media comprising an ensemble of nanostructure semiconductors such as self-assembled quantum dots, the gain broadening inhomogeneity also affects the interaction. Moreover, when gain media in the form of an active waveguide, such as optical amplifiers, are used, the interaction is distributed and includes nonresonant incoherent phenomena that occur simultaneously with the coherent effects. Such a complex system can exhibit, nevertheless, clear coherent interactions even at room temperature. Using InAs/InP quantum dot and wirelike quantum dash amplifiers, Rabi oscillations, self-induced transparency, coherent control using spectral pulse shaping, Ramsey interference, and photon echo have been demonstrated. The characterization employed cross frequency resolved optical gating, and the experiments were accompanied by a comprehensive finite difference time domain model that solves the Maxwell and Lindblad equations. This work has major implications on the understanding of the details of dynamical processes in active semiconductor devices, on short pulse generation from semiconductor lasers, and on various future quantum devices.

Applied Physics Reviews•Dec 1, 2019•4 citations

Coherent Control by Shaped Pulses in Room Temperature InAs/InP Quantum Dot Optical Amplifiers

Ouri Karni, Akhilesh Kumar Mishra, G. Eisenstein +2 more

By shaping their excitation pulses, we demonstrate control over coherent Rabi-oscillations exhibited in room temperature quantum dot semiconductor optical amplifiers designed for telecommunication applications. Experimental results and comprehensive numerical analysis are presented.

Conference on Lasers and Electro-Optics•Jan 1, 2016•0 citations

Quantum Coherent Interactions in Room Temperature InAs/InP Quantum Dot Amplifiers

G. Eisenstein, Johann Peter Reithmaier

We survey the latest advances in initiation and observation of quantum coherent interactions in room temperature quantum dot amplifiers operating at 1550 nm. Single and double pulse FROG measurements accompanied by detailed modeling are described.

•Jan 1, 2015•0 citations
Ramsey interference that enables careful control over quantum states is demonstrated here in an inhomogeneously broadened ensemble of quantum dots, which serve as the gain medium of a semiconductor waveguide operating at room temperature. A subfemtosecond-resolution pump-probe scheme reveals a clear oscillatory behavior of the amplitude and instantaneous frequency of the probe pulse. A unique phenomenon is also observed, whereby the temporal position of the output probe pulse also oscillates with the same periodicity. The latter cannot be observed in single-dot systems since it results from the distributed nature of the amplifier.
The use of ultrashort pulses allows to induce and observe quantum coherent effects in optical gain media where the coherence time is longer than the excitation pulses namely, room temperature quantum dot ensembles. We use InAs/InP quantum dot optical amplifiers as the experimental platform and have demonstrated effects such as coherently controlled Rabi Oscillations, Ramsey Fringes, Photon`Echoes, Prolongation of dephasing time via induced three pulse photon echoes. Recently we have advanced the field by demonstrating a hallmark experiment of quantum optics: Quantum Coherent collapse and revival which was never observed in a solid let alone at room temperature.
We report direct observations of Rabi oscillations and self-induced transparency in a quantum dot optical amplifier operating at room temperature. The experiments make use of pulses whose durations are shorter than the coherence time which are characterized using Cross-Frequency-Resolved Optical Gating. A numerical model which solves the Maxwell and Schrödinger equations and accounts for the inhomogeneously broadened nature of the quantum dot gain medium confirms the experimental results. The model is also used to explain the relationship between the observability of Rabi oscillations, the pulse duration and the homogeneous and inhomogeneous spectral widths of the semiconductor.
Light matter coherent interactions require that the coherent state induced in the matter be maintained for the duration of the observation. The only way to induce and observe such interactions in room temperature semiconductors, where the coherence time is of the order of a few hundred femtoseconds, is to use ultrashort pulse excitations and an ultrafast characterization technique. For media comprising an ensemble of nanostructure semiconductors such as self-assembled quantum dots, the gain broadening inhomogeneity also affects the interaction. Moreover, when gain media in the form of an active waveguide, such as optical amplifiers, are used, the interaction is distributed and includes nonresonant incoherent phenomena that occur simultaneously with the coherent effects. Such a complex system can exhibit, nevertheless, clear coherent interactions even at room temperature. Using InAs/InP quantum dot and wirelike quantum dash amplifiers, Rabi oscillations, self-induced transparency, coherent control using spectral pulse shaping, Ramsey interference, and photon echo have been demonstrated. The characterization employed cross frequency resolved optical gating, and the experiments were accompanied by a comprehensive finite difference time domain model that solves the Maxwell and Lindblad equations. This work has major implications on the understanding of the details of dynamical processes in active semiconductor devices, on short pulse generation from semiconductor lasers, and on various future quantum devices.