Spectral tuning of diamond photonic crystal slabs by deposition of a thin layer with silicon vacancy centers

0549926 - FZÚ 2022 RIV DE eng J - Journal Article
Fait, Jan - Varga, Marián - Hruška, Karel - Kromka, Alexander - Rezek, B. - Ondič, Lukáš
Spectral tuning of diamond photonic crystal slabs by deposition of a thin layer with silicon vacancy centers.
Nanophotonics. Roč. 10, č. 15 (2021), s. 3895-3905. ISSN 2192-8606. E-ISSN 2192-8614
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-14523S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR LQ100102001
Program: Prémie Lumina quaeruntur
Institutional support: RVO:68378271
Keywords : leaky modes * nanocrystalline diamond * photonic crystal slab * silicon vacancy * spectral tuning
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 7.923, year: 2021
Method of publishing: Open access

We demonstrate a new two-step method for fabricating diamond PhC slabs with leaky modes overlapping the emission line of the silicon vacancy (SiV) centers. In the first step, the PhC structure with leaky modes blue shifted from the SiV emission line is fabricated in a nanocrystalline diamond without SiV centers. A thin layer of SiV-rich diamond is then deposited over the PhC slab so that the spectral position of the PhC leaky modes is adjusted to the emission line of the SiV centers, thereby avoiding the need for nanoscale precision of the structuring method. An intensity enhancement of the zero-phonon line of the SiV centers by a factor of nine is achieved. The color centers in the thin surface layer are beneficial for sensing applications and their properties can also be further controlled by the diamond surface chemistry. The demonstrated PhC tuning method can also be easily adapted to other optical centers and photonic structures of different types in diamond and other materials.

Permanent Link: http://hdl.handle.net/11104/0325809