Surface enhanced Raman spectroscopy by interfered femtosecond laser created nanostructures

Chao Wang, Yun Ching Chang, Jimmy Yao, Claire Luo, Stuart Yin, Paul Ruffin, Christina Brantley, Eugene Edwards

    Research output: Contribution to journalArticlepeer-review

    22 Scopus citations

    Abstract

    A type of surface enhanced Raman spectroscopy (SERS) by interfered femtosecond laser created nanostructures on Cu metal is presented. It is found out that finer and more uniform nanostructures (with an average feature size 100 nm or smaller) can be created on Cu metal by interfered femtosecond illumination with a phase mask. Significantly enhanced Raman signal (with an enhancement factor around 863) can be realized by using the nanostructured Cu substrate created by the interfered femtosecond laser illumination. The experimentally measured enhancement factor agrees relatively well with the theoretical analyses. Since the nanostructures can be inscribed in real time and at remote locations by the femtosecond laser inscription, the proposed SERS can be particularly useful for the standoff detection of chemicals.

    Original languageEnglish (US)
    Article number023107
    JournalApplied Physics Letters
    Volume100
    Issue number2
    DOIs
    StatePublished - Jan 9 2012

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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