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

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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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Authors and Affiliations

  1. Japan Science and Technology Agency, Machida, Tokyo, 194-0004, Japan

    T. Kawazoe & M. Ohtsu

  2. Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8551, Japan

    K. Kobayashi

  3. National Institute of Information and Communications Technology, Koganei, Tokyo, 184-8795, Japan

    K. Akahane, M. Naruse & N. Yamamoto

  4. Department of Electronics Engineering, University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan

    M. Ohtsu

Authors
  1. T. Kawazoe
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  2. K. Kobayashi
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  3. K. Akahane
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  4. M. Naruse
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  5. N. Yamamoto
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  6. M. Ohtsu
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Corresponding author

Correspondence to T. Kawazoe.

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PACS

78.67.Hc; 07.79.Fc; 42.79.Ta

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Kawazoe, T., Kobayashi, K., Akahane, K. et al. Demonstration of nanophotonic NOT gate using near-field optically coupled quantum dots. Appl. Phys. B 84, 243–246 (2006). https://doi.org/10.1007/s00340-006-2234-x

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  • DOI: https://doi.org/10.1007/s00340-006-2234-x

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