TY - JOUR

T1 - Enhancing the photoluminescence response of thick Ge-on-Si layers using photonic crystals

AU - Yurasov, D.

AU - Yablonskiy, A. N.

AU - Baidakova, N. A.

AU - Shaleev, M.

AU - Rodyakina, E. E.

AU - Dyakov, S. A.

AU - Novikov, A.

N1 - Funding Information: The authors acknowledge Z Sh Gasayniev, who carried out the FIB experiments. This work was funded by the Russian Science Foundation (Grant No. 19-72-10011). The experiments were carried out using the facilities of the 'Physics and technology of micro- and nanostructures' Center at IPM RAS. Publisher Copyright: © 2022 Institute of Physics Publishing. All rights reserved.

PY - 2022/2/17

Y1 - 2022/2/17

N2 - More than an order of magnitude enhancement of the room-temperature photoluminescence (PL) signal from rather thick germanium layers grown on Si(001) was obtained through the utilization of 2D photonic crystals (PhCs). A set of PhCs with different periods and filling factors was fabricated and studied using micro-PL spectroscopy. Optical features of the fabricated PhCs were also theoretically modeled using rigorously coupled wave analysis, which allowed us to bring the observed peaks in the PL response into correlation with the different modes of PhC. In particular, we were able to associate the well-resolved peaks in the PL spectra with the optically active modes of the PhCs. The obtained results proved the possibility of using a homogeneously distributed active medium in PhCs without the formation of specially designed cavities in order to redistribute the internal emitted light into the required modes and efficiently extract it in the far field. The relative simplicity and higher tolerance to fabrication imperfections, as well as the large working area of these kinds of PhCs compared to PhCs with microcavities, can be advantageous for creating a PhC-based Si-compatible light source for the telecom band.

AB - More than an order of magnitude enhancement of the room-temperature photoluminescence (PL) signal from rather thick germanium layers grown on Si(001) was obtained through the utilization of 2D photonic crystals (PhCs). A set of PhCs with different periods and filling factors was fabricated and studied using micro-PL spectroscopy. Optical features of the fabricated PhCs were also theoretically modeled using rigorously coupled wave analysis, which allowed us to bring the observed peaks in the PL response into correlation with the different modes of PhC. In particular, we were able to associate the well-resolved peaks in the PL spectra with the optically active modes of the PhCs. The obtained results proved the possibility of using a homogeneously distributed active medium in PhCs without the formation of specially designed cavities in order to redistribute the internal emitted light into the required modes and efficiently extract it in the far field. The relative simplicity and higher tolerance to fabrication imperfections, as well as the large working area of these kinds of PhCs compared to PhCs with microcavities, can be advantageous for creating a PhC-based Si-compatible light source for the telecom band.

KW - germanium

KW - photoluminescence

KW - photonic crystal slabs

KW - QUANTUM DOTS

KW - LIGHT

KW - SILICON

KW - EMISSION

KW - RESONANCES

KW - GROWTH

KW - Photoluminescence

KW - Germanium

KW - Photonic crystal slabs

UR - http://www.scopus.com/inward/record.url?scp=85119669336&partnerID=8YFLogxK

U2 - 10.1088/1361-6463/ac32fe

DO - 10.1088/1361-6463/ac32fe

M3 - Article

VL - 55

JO - Journal Physics D: Applied Physics

JF - Journal Physics D: Applied Physics

SN - 0022-3727

IS - 7

M1 - 075107

ER -