Abstract
We show that the long sought utilization of quantum mechanical phenomena for practical purposes is feasible by demonstrating the ability to control quantum coherent Rabi oscillations in a room-temperature quantum dot semiconductor optical amplifier (SOA) with shaped light pulses. The experiments, confirmed by a comprehensive numerical calculation, reveal that linearly chirped ultrashort pulses, interacting coherently upon propagation with the short wavelength slope of the SOA gain spectrum, may enhance or suppress (depending on the chirp) the induced Rabi oscillations. This opens the door for many other experiments, inspired by fundamental quantum science, performed on practical platforms, that will turn quantum mechanical effects into applications.
Highlights
Triggering and controlling quantum coherent light-matter interactions are key elements in the fundamental study of quantum mechanical systems and their potential applications for quantum information processing, communication, control of chemical reactions, sensing and quantum simulations
In order to clarify the differences between the numerical predictions and the experiments, the calculations were repeated except that the model was fed with the measured input pulse shapes, of quadratic SP (QSP) values -0.25, 0, and 0.25 ps2
We have demonstrated the ability to modify the coherent interaction between an ultra-short, shaped, pulse and the interband transition in a room-temperature quantum dots (QDs) semiconductor optical amplifier (SOA)
Summary
Triggering and controlling quantum coherent light-matter interactions are key elements in the fundamental study of quantum mechanical systems and their potential applications for quantum information processing, communication, control of chemical reactions, sensing and quantum simulations Most often, they are observed in studies of isolated systems operating at cryogenic temperatures, such as (cold) atoms or molecules in gaseous phase [1,2], excitons in semiconductor quantum dots (QDs)[3], electron spins in different solids [4,5], and light harvesting molecular complexes [6,7]. Seeking to bridge the gap between fundamental and applicative studies, we rely on several recent demonstrations of quantum coherent Rabi-oscillations in room-temperature nano-structured semiconductor optical amplifiers (SOAs) operating both at 1.55 μm [10, 11] and 1.3 μm [12] These observations made use of short pulse excitations and ultrashort characterization techniques and offer opportunities to study the short lived quantum-mechanical interface of radiation and a QD medium in those conditions. They impact future classical as well as quantum mechanical applications
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