TY - JOUR
T1 - Fabrication and characterization of shape- and topology-optimized optical cavities with deep sub-wavelength confinement for interfacing with colloidal quantum dots
AU - Abutoama, Mohammad
AU - Christiansen, Rasmus Ellebæk
AU - Dubré, Adrian Holm
AU - Xiong, Meng
AU - Mørk, Jesper
AU - Kristensen, Philip Trøst
PY - 2025
Y1 - 2025
N2 - We employ a combined shape- and topology-optimization strategy to design manufacturable two-dimensional photonic crystal-based optical nanocavities that confine light to length scales well below the resonance wavelength. We present details of the design strategy as well as scanning electron micrographs of the fabricated indium phosphide cavities with a compact footprint of approximately 4.5λ x 4.5λ , which feature gaps on the order of 10 nm and a theoretical mode volume in the gap center below0.1 (λ/2nair)3 . Subsequent optical characterization of the far-field emission as well as Purcell-enhanced photoluminescence from the cavities with and without spin-coated colloidal quantum dots are compared to numerical simulations and reveal an interesting interplay of two spectrally adjacent modes. The results corroborate the potential of the fabrication process for ensuring high yield and reliable performance as well as the viability of the material platform for exploring light-matter interaction with colloidal QDs.
AB - We employ a combined shape- and topology-optimization strategy to design manufacturable two-dimensional photonic crystal-based optical nanocavities that confine light to length scales well below the resonance wavelength. We present details of the design strategy as well as scanning electron micrographs of the fabricated indium phosphide cavities with a compact footprint of approximately 4.5λ x 4.5λ , which feature gaps on the order of 10 nm and a theoretical mode volume in the gap center below0.1 (λ/2nair)3 . Subsequent optical characterization of the far-field emission as well as Purcell-enhanced photoluminescence from the cavities with and without spin-coated colloidal quantum dots are compared to numerical simulations and reveal an interesting interplay of two spectrally adjacent modes. The results corroborate the potential of the fabrication process for ensuring high yield and reliable performance as well as the viability of the material platform for exploring light-matter interaction with colloidal QDs.
U2 - 10.1016/j.optlastec.2025.113038
DO - 10.1016/j.optlastec.2025.113038
M3 - Journal article
SN - 0030-3992
VL - 190
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 113038
ER -