Excitation of surface plasmon polariton modes with multiple nitrogen vacancy centers in single nanodiamonds
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-12-21 |
| Journal | Journal of Optics |
| Authors | Shailesh Kumar, Jens L. Lausen, Cesar E. GarciaāOrtiz, Sebastian K. H. Andersen, Alexander S. Roberts |
| Citations | 6 |
Abstract
Section titled āAbstractāNitrogen-vacancy (NV) centers in diamonds are interesting due to their\nremarkable characteristics that are well suited to applications in\nquantum-information processing and magnetic field sensing, as well as\nrepresenting stable fluorescent sources. Multiple NV centers in nanodiamonds\n(NDs) are especially useful as biological fluorophores due to their chemical\nneutrality, brightness and room-temperature photostability. Furthermore, NDs\ncontaining multiple NV centers also have potential in high-precision magnetic\nfield and temperature sensing. Coupling NV centers to propagating surface\nplasmon polariton (SPP) modes gives a base for lab-on-a-chip sensing devices,\nallows enhanced fluorescence emission and collection which can further enhance\nthe precision of NV-based sensors. Here, we investigate coupling of multiple NV\ncenters in individual NDs to the SPP modes supported by silver surfaces\nprotected by thin dielectric layers and by gold V-grooves (VGs) produced via\nthe self-terminated silicon etching. In the first case, we concentrate on\nmonitoring differences in fluorescence spectra obtained from a source ND, which\nis illuminated by a pump laser, and from a scattering ND illuminated only by\nthe fluorescence-excited SPP radiation. In the second case, we observe changes\nin the average NV lifetime when the same ND is characterized outside and inside\na VG. Fluorescence emission from the VG terminations is also observed, which\nconfirms the NV coupling to the VG-supported SPP modes.\n