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Media type:
E-Article
Title:
Bright optical centre in diamond with narrow, highly polarised and nearly phonon-free fluorescence at room temperature
Contributor:
John, Roger
[Author];
Lehnert, Jan
[Author];
Mensing, Michael
[Author];
Spemann, Daniel
[Author];
Pezzagna, Sébastien
[Author];
Meijer, Jan
[Author]
Description:
Using shallow implantation of ions and molecules with masses centred at 27 atomic mass units(amu)in diamond, a new artificial optical centre with unique properties has been created. The centre shows alinearly polarised fluorescence with a main narrow emission line mostly found at 582 nm, togetherwith a weak vibronic sideband at room temperature. The fluorescence lifetime is∼2 ns and thebrightest centres are more than three times brighter than the nitrogen-vacancy centres. A majority ofthe centres shows stable fluorescence whereas some others present a blinking behaviour, at faster orslower rates. Furthermore, a second kind of optical centre has been simultaneously created in the samediamond sample, within the same ion implantation run. This centre has a narrow zero-phonon line(ZPL) at∼546 nm and a broad phonon sideband at room temperature. Interestingly, opticallydetected magnetic resonance (ODMR) has been measured on several single 546 nm centres and tworesonance peaks are found at 0.99 and 1.27 GHz. In view of their very similar ODMR and opticalspectra, the 546 nm centre is likely to coincide with the ST1 centre, reported once (with a ZPL at550 nm), but of still unknown nature. These new kinds of centres are promising for quantuminformation processing, sub-diffraction optical imaging or use as single-photon sources.