Dual-Wavelength Lasing in Quantum-Dot Plasmonic Lattice Lasers

Abstract

Arrays of metallic particles patterned on a substrate have emerged as a promising design for on-chip plasmonic lasers. In past examples of such devices, the periodic particles provided feedback at a single resonance wavelength, and organic dye molecules were used as the gain material.Here, we introduce a flexible template-based fabrication method that allows a broader design space for Ag particle-array lasers. Instead of dye molecules, we integrate colloidal quantum dots (QDs), which offer better photostability and wavelength tunability. Our fabrication approach also allows us to easily adjust the refractive index of the substrate and the QD-film thickness. Exploiting these capabilities, we demonstrate not only single-wavelength lasing but dual-wavelength lasing via two distinct strategies. First, by using particle arrays with rectangular lattice symmetries, we obtain feedback from two orthogonal directions. The two output wavelengths from this laser can be selected individually using a linear polarizer. Second, by adjusting the QD-film thickness, we use higher-order transverse waveguide modes in the QD film to obtain dual-wavelength lasing at normal and off-normal angles from a symmetric square array. We thus show that our approach offers various design possibilities to tune the laser output.

Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons

“…The spacing of the multiple peaks decreases toward lower energy, ruling out the possibility of a trivial Fabry-Pérot interference. We have also observed that the spacing does not depend on the periodicity or lattice size in a straighforward manner, and is not caused by waveguide effects 25,44 . Based on T-matrix simulations, we find that the cylindrical shape and finite size of the nanoparticles leads to three distinct modes around the Γ-point (k y = k x = 0) energy in an infinite lattice, one of these modes being highly degenerate.…”

Metallic Nanowire Coupled CsPbBr3 Quantum Dots Plasmonic Nanolaser

“…[ 5 ] Then further demonstrations were reported including semiconductor‐based plasmonic nanocavities, [ 6–11 ] metal‐cladding nanoresonators, [ 12–14 ] and lattice plasmon resonances. [ 15–18 ] Among these plasmonic nanolasers, the semiconductor nanowire (NW)‐based plasmonic lasers, [ 8–11,19,20 ] which support a plasmonic‐waveguide mode propagating along the NW axis, have attracted a high level of interest due to their potential benefits in on‐chip integration and optical signal propagation. [ 21,22 ]…”

Hybrid Plasmonic Surface Lattice Resonance Perovskite Lasers on Silver Nanoparticle Arrays

“…Figure a shows the schematic diagram of our proposed hybrid plasmonic perovskite laser, which contains a 200 nm thick MAPbBr 3 perovskite thin film, a 10 nm thick Al 2 O 3 passivation layer, a 30 nm thick Ag nanoparticle array, and a glass substrate. This structure supports the hybrid plasmonic SLR mode with different diffraction orders, which can be determined by the coupling direction of the electric or magnetic dipole and need to satisfy the following equation: [ 32,33 ] where and represent the in‐plane wave vector of the incident and diffractive wave, respectively. is the reciprocal lattice vector.…”