Measuring quantum coherence in bulk solids using dual phase-locked optical pulses

Shingo Hayashi; Keigo Kato; Katsura Norimatsu; Masaki Hada; Yosuke Kayanuma; Kazutaka G. Nakamura

doi:10.1038/srep04456

Measuring quantum coherence in bulk solids using dual phase-locked optical pulses

Shingo Hayashi, Keigo Kato, Katsura Norimatsu, Masaki Hada, Yosuke Kayanuma, Kazutaka G. Nakamura

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Electronic and phonon coherence are usually measured in different ways because their time-scales are very different. In this paper we simultaneously measure the electronic and phonon coherence using the interference of the electron-phonon correlated states induced by two phase-locked optical pulses. Interferometric visibility showed that electronic coherence remained in a semiconducting GaAs crystal until ∼40 fs; in contrast, electronic coherence disappeared within 10 fs in a semimetallic Bi crystal at room temperature, differing substantially from the long damping time of its phonon coherence, in the picosecond range.

Original language	English
Article number	4456
Journal	Scientific reports
Volume	4
DOIs	https://doi.org/10.1038/srep04456
Publication status	Published - Mar 25 2014

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AU - Kato, Keigo

AU - Norimatsu, Katsura

AU - Hada, Masaki

AU - Kayanuma, Yosuke

AU - Nakamura, Kazutaka G.

PY - 2014/3/25

Y1 - 2014/3/25

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AB - Electronic and phonon coherence are usually measured in different ways because their time-scales are very different. In this paper we simultaneously measure the electronic and phonon coherence using the interference of the electron-phonon correlated states induced by two phase-locked optical pulses. Interferometric visibility showed that electronic coherence remained in a semiconducting GaAs crystal until ∼40 fs; in contrast, electronic coherence disappeared within 10 fs in a semimetallic Bi crystal at room temperature, differing substantially from the long damping time of its phonon coherence, in the picosecond range.

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Measuring quantum coherence in bulk solids using dual phase-locked optical pulses

Abstract

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