Photon retention in coherently excited nitrogen ions
- URL: http://arxiv.org/abs/2011.11926v2
- Date: Fri, 2 Jul 2021 01:51:05 GMT
- Title: Photon retention in coherently excited nitrogen ions
- Abstract summary: We show photon retention and subsequent re-emittance with the quantum coherence in a system of coherently excited molecular nitrogen ions (N2+)
We reveal a pivotal role of the excited-state population to transmit such extremely weak re-emitted photons in this system.
This new finding unveils the nature of the coherent quantum control in N2+ for the potential platform for optical information storage in the remote atmosphere.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum coherence in quantum optics is an essential part of optical
information processing and light manipulation. Alkali metal vapors, despite the
numerous shortcomings, are traditionally used in quantum optics as a working
medium due to convenient near-infrared excitation, strong dipole transitions
and long-lived coherence. Here, we proposed and experimentally demonstrated
photon retention and subsequent re-emittance with the quantum coherence in a
system of coherently excited molecular nitrogen ions (N2+) which are produced
using a strong 800 nm femtosecond laser pulse. Such photon retention,
facilitated by quantum coherence, keeps releasing directly-unmeasurable
coherent photons for tens of picoseconds, but is able to be read-out by a
time-delayed femtosecond pulse centered at 1580 nm via two-photon resonant
absorption, resulting in a strong radiation at 329.3 nm. We reveal a pivotal
role of the excited-state population to transmit such extremely weak re-emitted
photons in this system. This new finding unveils the nature of the coherent
quantum control in N2+ for the potential platform for optical information
storage in the remote atmosphere, and facilitates further exploration of
fundamental interactions in the quantum optical platform with strong-field
ionized molecules.
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