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Evidence for laser action driven by electrochemiluminescence

Nature volume 394, pages 659–661 (1998)Cite this article

Abstract

Emission of light from excited-state dye molecules can be driven by the electron transfer between electrochemically generated anion and cation radicals — a process known as electrochemiluminescence1,2,3,4,5 (ECL). ECL has been investigated for both display6 and laser applications7,8,9. The latter is of particular interest as, in contrast to conventional dye lasers, a laser operating by this principle would not require an additional laser source optically to pump the dye into the required excited state, and may offer additional advantages in terms of power, tunability and range of available wavelengths. But the pumping rate hitherto achieved by ECL is two orders of magnitude lower than the optical pumping threshold9. Here we describe a device structure designed to enhance the efficiency of the ECL process, and present evidence that laser action has been realized in such a structure: the ECL spectrum is strongly modulated by the device structure, the output intensity shows a clear threshold as the drive current increases, and spectral narrowing is observed as the intensity increases.

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Figure 1: Diagram of electrochemilumninescence (ECL) laser.
Figure 2: The effect of the thin-layer cell cavity on ECL.
Figure 3: ECL intensity (peak height at 445 nm) versus injection current.
Figure 4: A comparison of the ECL spectrum above the threshold (trace a), with that well below the threshold (trace b).
Figure 5: The change of ECL spectrum with time after application of 30 V to the cell.

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Acknowledgements

We are grateful to M. Morita for encouragement and support.

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Authors and Affiliations

  1. NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, 243-0198, Kanagawa, Japan

    Tsutomu Horiuchi, Osamu Niwa & Noriyuki Hatakenaka

Authors
  1. Tsutomu Horiuchi
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  2. Osamu Niwa
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  3. Noriyuki Hatakenaka
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Correspondence to Tsutomu Horiuchi.

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Horiuchi, T., Niwa, O. & Hatakenaka, N. Evidence for laser action driven by electrochemiluminescence. Nature 394, 659–661 (1998). https://doi.org/10.1038/29260

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