Ultrafast parametric process in a photonic-crystal nanocavity switch

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report experimental and theoretical investigations of ultrafast coherent dynamics in a photonic-crystal point-defect nanocavity. The experimental investigations are carried out using a versatile heterodyne pump-probe setup giving access to wavelength and time-resolved dynamics. We find that parametric processes originating from coherent interactions between the pump and the probe lead to characteristic and clearly distinguishable features in the time-resolved dynamics. The parametric process is caused by fast oscillations of spatially trapped carriers, with the nanocavity acting to enhance the optical fields and thereby the strength of these processes. This interpretation is confirmed by the good agreement that is obtained with a theoretical model, which extends previous works by taking into account wave-mixing effects among the probe and pump pulse. The physics behind the parametric process is explained in detail and a simple expression is derived for the conditions under which coherent interactions lead to high-transmission bands for the probe pulses. These results are important for understanding how coherent effects can be used to improve the dynamical properties of nanocavity switches.

Original languageEnglish
Article number053835
JournalPhysical Review A
Volume99
Issue number5
Number of pages7
ISSN2469-9926
DOIs
Publication statusPublished - 23 May 2019

Cite this

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title = "Ultrafast parametric process in a photonic-crystal nanocavity switch",
abstract = "We report experimental and theoretical investigations of ultrafast coherent dynamics in a photonic-crystal point-defect nanocavity. The experimental investigations are carried out using a versatile heterodyne pump-probe setup giving access to wavelength and time-resolved dynamics. We find that parametric processes originating from coherent interactions between the pump and the probe lead to characteristic and clearly distinguishable features in the time-resolved dynamics. The parametric process is caused by fast oscillations of spatially trapped carriers, with the nanocavity acting to enhance the optical fields and thereby the strength of these processes. This interpretation is confirmed by the good agreement that is obtained with a theoretical model, which extends previous works by taking into account wave-mixing effects among the probe and pump pulse. The physics behind the parametric process is explained in detail and a simple expression is derived for the conditions under which coherent interactions lead to high-transmission bands for the probe pulses. These results are important for understanding how coherent effects can be used to improve the dynamical properties of nanocavity switches.",
author = "Per Lunnemann and Yi Yu and Kristoffer Joanesarson and Jesper M{\o}rk",
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doi = "10.1103/PhysRevA.99.053835",
language = "English",
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journal = "Physical Review A (Atomic, Molecular and Optical Physics)",
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Ultrafast parametric process in a photonic-crystal nanocavity switch. / Lunnemann, Per; Yu, Yi; Joanesarson, Kristoffer; Mørk, Jesper.

In: Physical Review A, Vol. 99, No. 5, 053835, 23.05.2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Ultrafast parametric process in a photonic-crystal nanocavity switch

AU - Lunnemann, Per

AU - Yu, Yi

AU - Joanesarson, Kristoffer

AU - Mørk, Jesper

PY - 2019/5/23

Y1 - 2019/5/23

N2 - We report experimental and theoretical investigations of ultrafast coherent dynamics in a photonic-crystal point-defect nanocavity. The experimental investigations are carried out using a versatile heterodyne pump-probe setup giving access to wavelength and time-resolved dynamics. We find that parametric processes originating from coherent interactions between the pump and the probe lead to characteristic and clearly distinguishable features in the time-resolved dynamics. The parametric process is caused by fast oscillations of spatially trapped carriers, with the nanocavity acting to enhance the optical fields and thereby the strength of these processes. This interpretation is confirmed by the good agreement that is obtained with a theoretical model, which extends previous works by taking into account wave-mixing effects among the probe and pump pulse. The physics behind the parametric process is explained in detail and a simple expression is derived for the conditions under which coherent interactions lead to high-transmission bands for the probe pulses. These results are important for understanding how coherent effects can be used to improve the dynamical properties of nanocavity switches.

AB - We report experimental and theoretical investigations of ultrafast coherent dynamics in a photonic-crystal point-defect nanocavity. The experimental investigations are carried out using a versatile heterodyne pump-probe setup giving access to wavelength and time-resolved dynamics. We find that parametric processes originating from coherent interactions between the pump and the probe lead to characteristic and clearly distinguishable features in the time-resolved dynamics. The parametric process is caused by fast oscillations of spatially trapped carriers, with the nanocavity acting to enhance the optical fields and thereby the strength of these processes. This interpretation is confirmed by the good agreement that is obtained with a theoretical model, which extends previous works by taking into account wave-mixing effects among the probe and pump pulse. The physics behind the parametric process is explained in detail and a simple expression is derived for the conditions under which coherent interactions lead to high-transmission bands for the probe pulses. These results are important for understanding how coherent effects can be used to improve the dynamical properties of nanocavity switches.

U2 - 10.1103/PhysRevA.99.053835

DO - 10.1103/PhysRevA.99.053835

M3 - Journal article

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JO - Physical Review A (Atomic, Molecular and Optical Physics)

JF - Physical Review A (Atomic, Molecular and Optical Physics)

SN - 2469-9926

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ER -