TY - JOUR
T1 - Unveiling the Enhancement of Spontaneous Emission at Exceptional Points
AU - Ferrier, L.
AU - Bouteyre, P.
AU - Pick, A.
AU - Cueff, S.
AU - Dang, N. H.M.
AU - Diederichs, C.
AU - Belarouci, A.
AU - Benyattou, T.
AU - Zhao, J. X.
AU - Su, R.
AU - Xing, J.
AU - Xiong, Qihua
AU - Nguyen, H. S.
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/8/19
Y1 - 2022/8/19
N2 - Exceptional points (EPs), singularities of non-Hermitian physics where complex spectral resonances degenerate, are one of the most exotic features of nonequilibrium open systems with unique properties. For instance, the emission rate of quantum emitters placed near resonators with EPs is enhanced (compared to the free-space emission rate) by a factor that scales quadratically with the resonance quality factor. Here, we verify the theory of spontaneous emission at EPs by measuring photoluminescence from photonic-crystal slabs that are embedded with a high-quantum-yield active material. While our experimental results verify the theoretically predicted enhancement, they also highlight the practical limitations on the enhancement due to material loss. Our designed structures can be used in applications that require enhanced and controlled emission, such as quantum sensing and imaging.
AB - Exceptional points (EPs), singularities of non-Hermitian physics where complex spectral resonances degenerate, are one of the most exotic features of nonequilibrium open systems with unique properties. For instance, the emission rate of quantum emitters placed near resonators with EPs is enhanced (compared to the free-space emission rate) by a factor that scales quadratically with the resonance quality factor. Here, we verify the theory of spontaneous emission at EPs by measuring photoluminescence from photonic-crystal slabs that are embedded with a high-quantum-yield active material. While our experimental results verify the theoretically predicted enhancement, they also highlight the practical limitations on the enhancement due to material loss. Our designed structures can be used in applications that require enhanced and controlled emission, such as quantum sensing and imaging.
UR - http://www.scopus.com/inward/record.url?scp=85136878421&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.129.083602
DO - 10.1103/PhysRevLett.129.083602
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C2 - 36053693
AN - SCOPUS:85136878421
SN - 0031-9007
VL - 129
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
M1 - 083602
ER -