title: Frequency comb transferred by surface plasmon resonance.
abstract: Frequency combs, millions of narrow-linewidth optical modes referenced to an atomic clock, have shown remarkable potential in time/frequency metrology, atomic/molecular spectroscopy and precision LIDARs. Applications have extended to coherent nonlinear Raman spectroscopy of molecules and quantum metrology for entangled atomic qubits. Frequency combs will create novel possibilities in nano-photonics and plasmonics; however, its interrelation with surface plasmons is unexplored despite the important role that plasmonics plays in nonlinear spectroscopy and quantum optics through the manipulation of light on a subwavelength scale. Here, we demonstrate that a frequency comb can be transformed to a plasmonic comb in plasmonic nanostructures and reverted to the original frequency comb without noticeable degradation of <6.51 × 10(-19) in absolute position, 2.92 × 10(-19) in stability and 1 Hz in linewidth. The results indicate that the superior performance of a well-defined frequency comb can be applied to nanoplasmonic spectroscopy, quantum metrology and subwavelength photonic circuits.
authors.affiliation: Max Planck Center for Attosecond Science, Max Planck POSTECH/KOREA Res. Initiative, Pohang, Gyeongbuk 376-73, South Korea.|Department of Physics, Center for Attosecond Science and Technology (CASTECH), POSTECH, Pohang, Gyeongbuk 376-73, South Korea.
authors.forename: Xiao Tao
authors.initials: XT
authors.lastname: Geng
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Byung Jae
authors.initials: BJ
authors.lastname: Chun
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Seo
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: Kwanyong
authors.initials: K
authors.lastname: Seo
authors.affiliation: Energy Storage Department, Korea Institute of Energy Research (KIER), Daejeon 305-343, South Korea.
authors.forename: Hana
authors.initials: H
authors.lastname: Yoon
authors.affiliation: Max Planck Center for Attosecond Science, Max Planck POSTECH/KOREA Res. Initiative, Pohang, Gyeongbuk 376-73, South Korea.|Department of Physics, Center for Attosecond Science and Technology (CASTECH), POSTECH, Pohang, Gyeongbuk 376-73, South Korea.
authors.forename: Dong-Eon
authors.initials: DE
authors.lastname: Kim
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Max Planck Center for Attosecond Science, Max Planck POSTECH/KOREA Res. Initiative, Pohang, Gyeongbuk 376-73, South Korea.|Department of Physics, Center for Attosecond Science and Technology (CASTECH), POSTECH, Pohang, Gyeongbuk 376-73, South Korea.
authors.forename: Seungchul
authors.initials: S
authors.lastname: Kim