Carrier diffusion and recombination in photonic crystal nanocavity optical switches

Takasumi Tanabe; Hideaki Taniyama; Masaya Notomi

doi:10.1109/JLT.2008.923638

Carrier diffusion and recombination in photonic crystal nanocavity optical switches

Takasumi Tanabe, Hideaki Taniyama, Masaya Notomi

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

71 Citations (Scopus)

Abstract

Carrier dynamics in silicon photonic crystal (PhC) nanocavities are studied numerically. The results agree well with previous experimental demonstrations. It is shown that the presence of carrier diffusion makes fast switching possible, which is an advantage of nanocavity switches over other types of larger carrier based nonlinear optical switches. In particular, diffusion is effective in PhC nanocavity switches, which makes the switching recovery time even faster than that of silicon waveguide-based optical switches. In addition, calculations suggest that the thermo-optic effect can be reduced if the carriers are extracted within a few 100 ps by introducing a p-i-n structure.

Original language	English
Pages (from-to)	1396-1403
Number of pages	8
Journal	Journal of Lightwave Technology
Volume	26
Issue number	11
DOIs	https://doi.org/10.1109/JLT.2008.923638
Publication status	Published - 2008 Jun 1
Externally published	Yes

Keywords

Charge carrier processes
Optical resonators
Optical switches
Periodic structures

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Access to Document

10.1109/JLT.2008.923638

Cite this

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title = "Carrier diffusion and recombination in photonic crystal nanocavity optical switches",

abstract = "Carrier dynamics in silicon photonic crystal (PhC) nanocavities are studied numerically. The results agree well with previous experimental demonstrations. It is shown that the presence of carrier diffusion makes fast switching possible, which is an advantage of nanocavity switches over other types of larger carrier based nonlinear optical switches. In particular, diffusion is effective in PhC nanocavity switches, which makes the switching recovery time even faster than that of silicon waveguide-based optical switches. In addition, calculations suggest that the thermo-optic effect can be reduced if the carriers are extracted within a few 100 ps by introducing a p-i-n structure.",

keywords = "Charge carrier processes, Optical resonators, Optical switches, Periodic structures",

author = "Takasumi Tanabe and Hideaki Taniyama and Masaya Notomi",

note = "Funding Information: Manuscript received September 28, 2007; revised December 8 2007. This work was supported in part by the Ministry of Education, Sports, Culture, Science and Technology, Japan, under a Grant-in-Aid for Scientific Research (#18760262) and in part by the National Institute of Information and Communications Technology (NICT).",

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AU - Tanabe, Takasumi

AU - Taniyama, Hideaki

AU - Notomi, Masaya

N1 - Funding Information: Manuscript received September 28, 2007; revised December 8 2007. This work was supported in part by the Ministry of Education, Sports, Culture, Science and Technology, Japan, under a Grant-in-Aid for Scientific Research (#18760262) and in part by the National Institute of Information and Communications Technology (NICT).

PY - 2008/6/1

Y1 - 2008/6/1

N2 - Carrier dynamics in silicon photonic crystal (PhC) nanocavities are studied numerically. The results agree well with previous experimental demonstrations. It is shown that the presence of carrier diffusion makes fast switching possible, which is an advantage of nanocavity switches over other types of larger carrier based nonlinear optical switches. In particular, diffusion is effective in PhC nanocavity switches, which makes the switching recovery time even faster than that of silicon waveguide-based optical switches. In addition, calculations suggest that the thermo-optic effect can be reduced if the carriers are extracted within a few 100 ps by introducing a p-i-n structure.

AB - Carrier dynamics in silicon photonic crystal (PhC) nanocavities are studied numerically. The results agree well with previous experimental demonstrations. It is shown that the presence of carrier diffusion makes fast switching possible, which is an advantage of nanocavity switches over other types of larger carrier based nonlinear optical switches. In particular, diffusion is effective in PhC nanocavity switches, which makes the switching recovery time even faster than that of silicon waveguide-based optical switches. In addition, calculations suggest that the thermo-optic effect can be reduced if the carriers are extracted within a few 100 ps by introducing a p-i-n structure.

KW - Charge carrier processes

KW - Optical resonators

KW - Optical switches

KW - Periodic structures

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Carrier diffusion and recombination in photonic crystal nanocavity optical switches

Abstract

Keywords

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