Tailoring the photon hopping by nearest and next-nearest-neighbour interaction in photonic arrays (original) (raw)

Multimodal strong coupling of photonic crystal cavities of dissimilar size

Applied Physics Letters, 2012

A photonic crystal three missing holes nanocavity, having only a few modes, is coupled to a 60 missing holes long multimode cavity, both fabricated in the same InGaAsP membrane. The coupling was studied in detail by the photothermal tuning of the small cavity over about three free spectral ranges of the large cavity. Strong coupling effects, involving at least three large cavity modes simultaneously, were observed from level anticrossing data. The observations are excellently reproduced by a model of coupled Fabry Perot resonators.

Coupled Photonic Crystal Nanocavities as a Tool to Tailor and Control Photon Emission

Ceramics

In this review, we report on the design, fabrication, and characterization of photonic crystal arrays, made of two and three coupled nanocavities. The properties of the cavity modes depend directly on the shape of the nanocavities and on their geometrical arrangement. A non-negligible role is also played by the possible disorder because of the fabrication processes. The experimental results on the spatial distribution of the cavity modes and their physical characteristics, like polarization and parity, are described and compared with the numerical simulations. Moreover, an innovative approach to deterministically couple the single emitters to the cavity modes is described. The possibility to image the mode spatial distribution, in single and coupled nanocavities, combined with the control of the emitter spatial position allows for a deterministic approach for the study of cavity quantum electrodynamics phenomena and for the development of new photonic-based applications.

Interaction between site-controlled quantum dot systems and photonic cavity structures

2017

The goal of this thesis was to investigate light-matter interaction in nanophotonic devices based on site-controlled pyramidal quantum dots (QD) in photonic crystal (PhC) cavities. These QDs provide position and spectral control, which is hardly achievable by the widely exploited self-assembled QD-based systems, thus allowing almost ideal cloning of differently designed devices in thousands of copies on the same chip. Thus, we conducted statistical studies of the optical properties of a large variety of photonic structures without concerns about significant deviations from the targeted layout. In particular, we addressed the influence of the QD position with respect to the electrical field pattern of the cavity mode (CM) on the optical properties of the QD excitonic transitions. We integrated a single pyramidal QD in a linear PhC membrane cavity with three missing holes (L3 PhC cavity) at a set of well-defined positions, among which were points corresponding to the first and the sec...

Tuning out disorder-induced localization in nanophotonic cavity arrays

Optics express, 2017

Weakly coupled high-Q nanophotonic cavities are building blocks of slow-light waveguides and other nanophotonic devices. Their functionality critically depends on tuning as resonance frequencies should stay within the bandwidth of the device. Unavoidable disorder leads to random frequency shifts which cause localization of the light in single cavities. We present a new method to finely tune individual resonances of light in a system of coupled nanocavities. We use holographic laser-induced heating and address thermal crosstalk between nanocavities using a response matrix approach. As a main result we observe a simultaneous anticrossing of 3 nanophotonic resonances, which were initially split by disorder.