title: Microfiber interferometer with surface plasmon-polariton involvement.
abstract: We fabricated a microfiber interferometer with surface plasmon-polaritons (SPPs) involvement. Commonly, the SPPs are not involved in interference due to the mismatch momentum and ultrashort propagation distance. In this Letter, an absorber-doped microfiber is utilized for increasing the matched momentum (i.e., their modal projection), and as a result, an SPP is coherent with an end-fire method-stimulated hybrid SPP. A mathematical model is proposed for investigating the modal-projection-caused interference, and its results show that the proposed interferometer is very dependent on the polarization. Confirmation experiments were carried out, and a good agreement between theoretical predictions and experimental results was found. The proposed interferometer will potentially facilitate many SPP studies in directly related fields.
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Wei-Gang
authors.initials: WG
authors.lastname: Zhang
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Li
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.forename: Tie-Yi
authors.initials: TY
authors.lastname: Yan
authors.forename: Jonathan
authors.initials: J
authors.lastname: Sieg
authors.forename: Ya
authors.initials: Y
authors.lastname: Han
authors.forename: Biao
authors.initials: B
authors.lastname: Wang