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Applied Physics B

, Volume 84, Issue 1–2, pp 243–246 | Cite as

Demonstration of nanophotonic NOT gate using near-field optically coupled quantum dots

  • T. KawazoeEmail author
  • K. Kobayashi
  • K. Akahane
  • M. Naruse
  • N. Yamamoto
  • M. Ohtsu
Article

Abstract

We propose and demonstrate the operation of a nanometric optical NOT gate using CuCl quantum dots coupled via an optical near-field interaction. The device was smaller than 20 nm and its repeated operation was verified. The operating energy of this device was much lower than that of a conventional photonic device. We also introduce all-optical NAND and NOR gates using coupled quantum dots. Toward an actual nanophotonic device, we discuss the possibility of coupled InAlAs quantum dots. A double layer of InAlAs quantum dots for nanophotonic device operation was prepared using molecular beam epitaxial growth. We obtained a near-field spectroscopy signal, indicating that the InAlAs quantum dots coupled with the optical near field acted as a NOT gate. The experimental results show that the sample has great potential as an actual nanophotonic device.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • T. Kawazoe
    • 1
    Email author
  • K. Kobayashi
    • 2
  • K. Akahane
    • 3
  • M. Naruse
    • 3
  • N. Yamamoto
    • 3
  • M. Ohtsu
    • 1
    • 4
  1. 1.Japan Science and Technology AgencyTokyoJapan
  2. 2.Department of PhysicsTokyo Institute of TechnologyTokyoJapan
  3. 3.National Institute of Information and Communications TechnologyTokyoJapan
  4. 4.Department of Electronics EngineeringUniversity of TokyoTokyoJapan

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