Collective Mie Resonances for Directional On-Chip Nanolasers

Abstract

A highly efficient nanocavity formed by optically coupled nanostructures is achieved by optimization of the collective Mie resonances in a one-dimensional array of semiconductor nanoparticles. Analysis of quasi-normal multipole modes enables us to reveal the close relation between the collective Mie resonances and Van Hove singularities. On the basis of these concepts, we experimentally demonstrate a directional GaAs nanolaser at cryogenic temperatures with well-defined, in-plane emission, which, moreover, can be controlled by selective excitation. The lasing threshold is shown to be significantly reduced by optimizing the interparticle gap such that the optimal near-field confinement is achieved at a resonant wavelength corresponding to the highest gain of GaAs. We show that the lasing performance of this nanolaser is orders of magnitude better than a nanowire-based laser of the same dimensions. The present work provides design guidelines for high performance in-plane emission nanolasers, which may find applications in future photonic integrated circuits.

High-Q localized states in finite arrays of subwavelength resonators

“…4. As a result, the mode volume becomes as small as ∼ 2.5(λ/n) 3 , implying the Purcell factor ∼ 560, which is much larger than the values reported previously for similar structures [15,21]. Moreover, by tuning the parameters of the array one can get the optimal conditions for N = 29 with higher Q-factor of Q = 1.8 • 10 5 (see Supplemental Materials [25]) and the Purcell enhancement factor of ∼ 3400.…”

“…Importantly, at the frequencies close to the band edge the phases of the fields in the neighbour resonators become close to π, which leads to destructive interference between the field scattered by individual resonators and consequently to suppressed radiation from the whole structure. been explored in applications to photonic crystals [17], and they have already been utilized for light emitting [18][19][20][21][22] and sensing [23,24] applications.…”

Highly efficient nonlinear optical emission from a subwavelength crystalline silicon cuboid mediated by supercavity mode

“…More importantly, it is difficult to obtain high-quality GaAs nanoparticles with distinct Mie resonances even though a post annealing process is employed. Very recently, it was noticed that lasing from GaAs nanodisks was realized by exploiting the quasi-BICs 37 , 54 , 55 . Although the quantum efficiency of GaAs nanodisks was not investigated in this case, the realization of lasing action implies that the quantum efficiency of GaAs nanoparticles should be higher than that of Si nanoparticles.…”

Multi-Symmetric Level (MSL) Optimization Technique Based on Genetic Algorithm for Photonic Devices Design

“…Photonic crystals are manufactured periodic structures designed to exhibit photonic band gap [5]. Thenceforth, the crystal geometrical variations have worldwide been explored in different contents [6], such as novel antennas [7]- [9], coupling [10], [11] and filtering devices [12], [13].…”