Few-fJ/bit data transmissions using directly modulated lambda-scale embedded active region photonic-crystal lasers

Koji Takeda, Tomonari Sato, Akihiko Shinya, Kengo Nozaki, Wataru Kobayashi, Hideaki Taniyama, Masaya Notomi, Koichi Hasebe, Takaaki Kakitsuka, Shinji Matsuo

Research output: Contribution to journalArticle

167 Citations (Scopus)

Abstract

A low operating energy is needed for nanocavity lasers designed for on-chip photonic network applications. On-chip nanocavity lasers must be driven by current because they act as light sources driven by electronic circuits. Here, we report the high-speed direct modulation of a lambda-scale embedded active region photonic-crystal (LEAP) laser that holds three records for any type of laser operated at room temperature: a low threshold current of 4.8 μA, a modulation current efficiency of 2.0 GHz μA -0.5 and an operating energy of 4.4 fJ bit -1. Five major technologies make this performance possible: a compact buried heterostructure, a photonic-crystal nanocavity, a lateral p-n junction realized by ion implantation and thermal diffusion, an InAlAs sacrificial layer and current-blocking trenches. We believe that an output power of 2.17 μW and an operating energy of 4.4 fJ bit -1 will enable us to realize on-chip photonic networks in combination with the recently developed highly sensitive receivers.

Original languageEnglish
Pages (from-to)569-575
Number of pages7
JournalNature Photonics
Volume7
Issue number7
DOIs
Publication statusPublished - 2013 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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    Takeda, K., Sato, T., Shinya, A., Nozaki, K., Kobayashi, W., Taniyama, H., Notomi, M., Hasebe, K., Kakitsuka, T., & Matsuo, S. (2013). Few-fJ/bit data transmissions using directly modulated lambda-scale embedded active region photonic-crystal lasers. Nature Photonics, 7(7), 569-575. https://doi.org/10.1038/nphoton.2013.110