Implementation of pulse timing discriminator functionality into a GeSbTe/GeCuTe double layer structure

Ryota Akimoto, Hiroaki Handa, Satoshi Shindo, Yuji Sutou, Masashi Kuwahara, Makoto Naruse, Toshiharu Saiki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The functionality of a pulse timing discriminator, which is commonly required in optical communication systems and artificial neuromorphic engineering, was implemented into chalcogenide phase-change materials. GeSbTe (GST) and GeCuTe (GCT), which exhibit opposite refractive index behavior in their respective crystalline and amorphous phases, were employed. A GST/GCT double layer enabled the order of arrival of two counter-propagating femtosecond pulses to be encoded as a difference in the degree of amorphization of the GCT layer, i.e., either a brighter or darker contrast of the amorphized area with respect to the crystalline background. Nonthermal ultrafast amorphization contributed to a picosecond time resolution in the discrimination of the pulse arrival order.

Original languageEnglish
Pages (from-to)26825-26831
Number of pages7
JournalOptics Express
Volume25
Issue number22
DOIs
Publication statusPublished - 2017 Oct 30

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discriminators
time measurement
arrivals
pulses
phase change materials
discrimination
optical communication
telecommunication
counters
engineering
refractivity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Implementation of pulse timing discriminator functionality into a GeSbTe/GeCuTe double layer structure. / Akimoto, Ryota; Handa, Hiroaki; Shindo, Satoshi; Sutou, Yuji; Kuwahara, Masashi; Naruse, Makoto; Saiki, Toshiharu.

In: Optics Express, Vol. 25, No. 22, 30.10.2017, p. 26825-26831.

Research output: Contribution to journalArticle

Akimoto, R, Handa, H, Shindo, S, Sutou, Y, Kuwahara, M, Naruse, M & Saiki, T 2017, 'Implementation of pulse timing discriminator functionality into a GeSbTe/GeCuTe double layer structure', Optics Express, vol. 25, no. 22, pp. 26825-26831. https://doi.org/10.1364/OE.25.026825
Akimoto R, Handa H, Shindo S, Sutou Y, Kuwahara M, Naruse M et al. Implementation of pulse timing discriminator functionality into a GeSbTe/GeCuTe double layer structure. Optics Express. 2017 Oct 30;25(22):26825-26831. https://doi.org/10.1364/OE.25.026825
Akimoto, Ryota ; Handa, Hiroaki ; Shindo, Satoshi ; Sutou, Yuji ; Kuwahara, Masashi ; Naruse, Makoto ; Saiki, Toshiharu. / Implementation of pulse timing discriminator functionality into a GeSbTe/GeCuTe double layer structure. In: Optics Express. 2017 ; Vol. 25, No. 22. pp. 26825-26831.
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