Frequency comb transferred by surface plasmon resonance

• Main Authors: Geng, Xiao Tao, Chun, Byung Jae, Seo, Ji Hoon, Seo, Kwanyong, Yoon, Hana, Kim, Dong-Eon, Kim, Young-Jin, Kim, Seungchul
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2018
• Subjects: DRNTU::Engineering::Mechanical engineering; Applied Physics; Nanophotonics And Plasmonics
• Online Access: https://hdl.handle.net/10356/89943; http://hdl.handle.net/10220/47164
• Institution: Nanyang Technological University

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.