Photon-number-discriminating detection using a quantum-dot, optically gated, field-effect transistor

E. J. Gansen, M. A. Rowe, M. B. Greene, D. Rosenberg, T. E. Harvey, M. Y. Su, R. H. Hadfield, S. W. Nam, R. P. Mirin

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

Detectors with the capability to directly measure the photon number of a pulse of light enable linear optics quantum computing, affect the security of quantum communications, and can be used to characterize and herald non-classical states of light. Here, we demonstrate the photon-number-resolving capabilities of a quantum-dot, optically gated, field-effect transistor that uses quantum dots as optically addressable floating gates in a GaAsAl0.2Ga0.8As -doped field-effect transistor. When the active area of the detector is illuminated, photo-generated carriers trapped by quantum dots screen the gate field, causing a persistent change in the channel current that is proportional to the number of confined carriers. Using weak laser pulses, we show that discrete numbers of trapped carriers produce well resolved changes in the channel current. We demonstrate that for a mean photon number of 1.1, decision regions can be defined such that the field-effect transistor determines the number of detected photons with a probability of accuracy greater than 83. © 2007 Nature Publishing Group.

Original languageEnglish
Pages (from-to)585-588
Number of pages4
JournalNature Photonics
Volume1
Issue number10
DOIs
Publication statusPublished - Oct 2007

Fingerprint Dive into the research topics of 'Photon-number-discriminating detection using a quantum-dot, optically gated, field-effect transistor'. Together they form a unique fingerprint.

  • Cite this

    Gansen, E. J., Rowe, M. A., Greene, M. B., Rosenberg, D., Harvey, T. E., Su, M. Y., Hadfield, R. H., Nam, S. W., & Mirin, R. P. (2007). Photon-number-discriminating detection using a quantum-dot, optically gated, field-effect transistor. Nature Photonics, 1(10), 585-588. https://doi.org/10.1038/nphoton.2007.173