TY - JOUR

T1 - Emission Enhancement of Ge/Si Quantum Dots in Hybrid Structures with Subwavelength Lattice of Al Nanodisks

AU - Zinovyev, Vladimir A

AU - Smagina, Zhanna V

AU - Zinovieva, Aigul F

AU - Bloshkin, Aleksei A

AU - Dvurechenskii, Anatoly V

AU - Rodyakina, Ekaterina E

AU - Stepikhova, Margarita V

AU - Peretokin, Artem V

AU - Novikov, Alexey V

N1 - Funding: This work is funded by Russian Science Foundation (21-72-20184) in the part of the theoretical study of PL enhancement effect in hybrid metal–dielectric structures. The development of hybrid structures and PL measurements are funded by Russian Science Foundation (19-12-00070-Π).

PY - 2023/8/25

Y1 - 2023/8/25

N2 - The effects of resonance interaction of plasmonic and photonic modes in hybrid metal-dielectric structures with square Al nanodisk lattices coupled with a Si waveguide layer were investigated using micro-photoluminescence (micro-PL) spectroscopy. As radiation sources, GeSi quantum dots were embedded in the waveguide. A set of narrow PL peaks superimposed on the broad bands were observed in the range of quantum dot emissions. At optimal parameters of Al nanodisks lattices, almost one order increasing of PL intensity was obtained. The experimental PL spectra are in good agreement with results of theoretical calculations. The realization of high-quality bound states in the continuum was confirmed by a comparative analysis of the experimental spectra and theoretical dispersion dependences. The results demonstrated the perspectives of these type structures for a flat band realization and supporting the slow light.

AB - The effects of resonance interaction of plasmonic and photonic modes in hybrid metal-dielectric structures with square Al nanodisk lattices coupled with a Si waveguide layer were investigated using micro-photoluminescence (micro-PL) spectroscopy. As radiation sources, GeSi quantum dots were embedded in the waveguide. A set of narrow PL peaks superimposed on the broad bands were observed in the range of quantum dot emissions. At optimal parameters of Al nanodisks lattices, almost one order increasing of PL intensity was obtained. The experimental PL spectra are in good agreement with results of theoretical calculations. The realization of high-quality bound states in the continuum was confirmed by a comparative analysis of the experimental spectra and theoretical dispersion dependences. The results demonstrated the perspectives of these type structures for a flat band realization and supporting the slow light.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85170291919&origin=inward&txGid=f7a2891ebee6b73566d59c3f89680b1d

U2 - 10.3390/nano13172422

DO - 10.3390/nano13172422

M3 - Article

C2 - 37686930

VL - 13

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 17

M1 - 2422

ER -