Microwave detection at 110 GHz by nanowires with broken symmetry

C. Balocco, A.M. Song (Corresponding Author), Markku Åberg, A. Forchel, T. Gonzalez, J. Mateos, I. Maximov, M. Missous, A.A. Rezazadeh, Jan Saijets, L. Samuelson, D. Wallin, K. Williams, L. Worschech, H.Q. Xu

    Research output: Contribution to journalArticleScientificpeer-review

    102 Citations (Scopus)


    By using arrays of nanowires with intentionally broken symmetry, we were able to detect microwaves up to 110 GHz at room temperature. This is, to the best of our knowledge, the highest speed that has been demonstrated in different types of novel electronic nanostructures to date. Our experiments showed a rather stable detection sensitivity over a broad frequency range from 100 MHz to 110 GHz. The novel working principle enabled the nanowires to detect microwaves efficiently without a dc bias. In principle, the need for only one high-resolution lithography step and the planar architecture allow an arbitrary number of nanowires to be made by folding a linear array as many times as required over a large area, for example, a whole wafer. Our experiment on 18 parallel nanowires showed a sensitivity of approximately 75 mV dc output/mW of nominal input power of the 110 GHz signal, even though only about 0.4% of the rf power was effectively applied to the structure because of an impedance mismatch. Because this array of nanowires operates simultaneously, low detection noise was achieved, allowing us to detect −25 dBm 110 GHz microwaves at zero bias with a standard setup.
    Original languageEnglish
    Pages (from-to)1423 - 1427
    Number of pages5
    JournalNano Letters
    Issue number7
    Publication statusPublished - 2005
    MoE publication typeA1 Journal article-refereed


    • microwave devices
    • nanowires
    • nanostructures
    • nanodevices


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