TY - JOUR

T1 - Interaction of Ge(Si) Self-Assembled Nanoislands with Different Modes of Two-Dimensional Photonic Crystal

AU - Stepikhova, Margarita V.

AU - Dyakov, Sergey A.

AU - Peretokin, Artem V.

AU - Shaleev, Mikhail V.

AU - Rodyakina, Ekaterina E.

AU - Novikov, Alexey V.

N1 - Funding Information: The work was supported by the Center of Excellence «Center of Photonics» funded by the Ministry of Science and Higher Education of the Russian Federation, contract No. 075-15-2022-316. Publisher Copyright: © 2022 by the authors.

PY - 2022/8

Y1 - 2022/8

N2 - The interaction of Ge(Si)/SOI self-assembled nanoislands with modes of photonic crystal slabs (PCS) with a hexagonal lattice is studied in detail. Appropriate selection of the PCS parameters and conditions for collecting the photoluminescence (PL) signal allowed to distinguish the PCS modes of different physical nature, particularly the radiative modes and modes associated to the bound states in the continuum (BIC). It is shown that the radiative modes with relatively low Q-factors could provide a increase greater than an order of magnitude in the integrated PL intensity in the wavelength range of 1.3–1.55 µm compared to the area outside of PCS at room temperature. At the same time, the interaction of Ge(Si) islands emission with the BIC-related modes provides the peak PL intensity increase of more than two orders of magnitude. The experimentally measured Q-factor of the PL line associated with the symmetry-protected BIC mode reaches the value of 2600.

AB - The interaction of Ge(Si)/SOI self-assembled nanoislands with modes of photonic crystal slabs (PCS) with a hexagonal lattice is studied in detail. Appropriate selection of the PCS parameters and conditions for collecting the photoluminescence (PL) signal allowed to distinguish the PCS modes of different physical nature, particularly the radiative modes and modes associated to the bound states in the continuum (BIC). It is shown that the radiative modes with relatively low Q-factors could provide a increase greater than an order of magnitude in the integrated PL intensity in the wavelength range of 1.3–1.55 µm compared to the area outside of PCS at room temperature. At the same time, the interaction of Ge(Si) islands emission with the BIC-related modes provides the peak PL intensity increase of more than two orders of magnitude. The experimentally measured Q-factor of the PL line associated with the symmetry-protected BIC mode reaches the value of 2600.

KW - bound states in the continuum

KW - Ge(Si) self-assembled nanoislands

KW - microphotoluminescence

KW - photonic crystal modes

KW - photonic crystal slab

UR - http://www.scopus.com/inward/record.url?scp=85136980914&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/115ca60b-fcba-32f6-99a5-bffaf74db4de/

U2 - 10.3390/nano12152687

DO - 10.3390/nano12152687

M3 - Article

C2 - 35957118

AN - SCOPUS:85136980914

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 15

M1 - 2687

ER -