TY - JOUR
T1 - Coupling Spin Defects in a Layered Material to Nanoscale Plasmonic Cavities
AU - Mendelson, Noah
AU - Ritika, Ritika
AU - Kianinia, Mehran
AU - Scott, John
AU - Kim, Sejeong
AU - Fröch, Johannes E.
AU - Gazzana, Camilla
AU - Westerhausen, Mika
AU - Xiao, Licheng
AU - Mohajerani, Seyed Sepehr
AU - Strauf, Stefan
AU - Toth, Milos
AU - Aharonovich, Igor
AU - Xu, Zai Quan
N1 - Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2022/1/6
Y1 - 2022/1/6
N2 - Spin defects in hexagonal boron nitride, and specifically the negatively charged boron vacancy (VB-) centers, are emerging candidates for quantum sensing. However, the VB- defects suffer from low quantum efficiency and, as a result, exhibit weak photoluminescence. In this work, a scalable approach is demonstrated to dramatically enhance the VB- emission by coupling to a plasmonic gap cavity. The plasmonic cavity is composed of a flat gold surface and a silver cube, with few-layer hBN flakes positioned in between. Employing these plasmonic cavities, two orders of magnitude are extracted in photoluminescence enhancement associated with a corresponding twofold enhancement in optically detected magnetic resonance contrast. The work will be pivotal to progress in quantum sensing employing 2D materials, and in realization of nanophotonic devices with spin defects in hexagonal boron nitride.
AB - Spin defects in hexagonal boron nitride, and specifically the negatively charged boron vacancy (VB-) centers, are emerging candidates for quantum sensing. However, the VB- defects suffer from low quantum efficiency and, as a result, exhibit weak photoluminescence. In this work, a scalable approach is demonstrated to dramatically enhance the VB- emission by coupling to a plasmonic gap cavity. The plasmonic cavity is composed of a flat gold surface and a silver cube, with few-layer hBN flakes positioned in between. Employing these plasmonic cavities, two orders of magnitude are extracted in photoluminescence enhancement associated with a corresponding twofold enhancement in optically detected magnetic resonance contrast. The work will be pivotal to progress in quantum sensing employing 2D materials, and in realization of nanophotonic devices with spin defects in hexagonal boron nitride.
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U2 - 10.1002/adma.202106046
DO - 10.1002/adma.202106046
M3 - Article
C2 - 34601757
AN - SCOPUS:85117204112
SN - 0935-9648
VL - 34
JO - Advanced Materials
JF - Advanced Materials
IS - 1
M1 - 2106046
ER -