Coherent control in a semiconductor optical amplifier operating at room temperature

A. Capua*, O. Karni, G. Eisenstein, V. Sichkovskyi, V. Ivanov, J. P. Reithmaier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Quantum decoherence times in semiconductors are extremely short, particularly at room temperature where the quantum phase is completely erased in a fraction of a picosecond. However, they are still of finite duration during which the quantum phase is well defined and can be tailored. Recently, we demonstrated that quantum coherent phenomena can be easily accessed by examining the phase and amplitude of an optical pulse following propagation along a room temperature semiconductor optical amplifier. Taking the form of Rabi oscillations, these recent observations enabled to decipher the time evolution of the ensemble states. Here we demonstrate the Ramsey analogous experiment known as coherent control. Remarkably, coherent control occurs even under room temperature conditions and enables to directly resolve the dephasing times. These results may open a new way for the realization of room temperature semiconductor-based ultra-high speed quantum processors with all the advantages of upscaling and low-cost manufacturing.

Original languageAmerican English
Article number5025
JournalNature Communications
Volume5
DOIs
StatePublished - 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Macmillan Publishers Limited.

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