Tunable photonic integrated toolbox: from realistic models to control algorithm
Andrea MELLONI*, Daniele MELATI, Stefano GRILLANDA, Andrea ANNONI, Nicola PESERICO1 and Francesco MORICHETTI
Dipartimento di Elettronics, Informazione e Bioingegneria, Politecnico di Milano, via Ponzio 34/5, 20133 Milano, Italy
The evolution towards complex photonic circuits integrating many building blocks and functionalities poses major issues on the design as well as on the control of the functionality in real operation conditions. Optical and thermal interactions between single devices, spurious effects, drifts, non-idealities and fabrication uncertainties can prevent the realized circuits to work as expected. As a consequence, advanced photonic devices must be considered as a system to control with feedback loops and algorithms, and the above non-idealities must be taken into account also during the early design stages to evaluate their impact on the circuit behavior and perform robust optimizations towards the parameters of interest.
Light interaction with resonance
Philippe LALANNE, Rémi FAGGIANI and Jianji YANG
LP2N, CNRS, Institut d’Optique, IOG – Univ. Bordeaux, 33400 Talence, France
Thanks to an efficient and intuitive quasi-normal mode formalism valid for micro and nanoresonators made of dielectric as well as lossy and dispersive materials, we shine new light on the physics and modelling of light interaction with electromagnetic resonances . In particular in the present context, we will discuss the role of quenching for light emission in metallic nanogap devices and will revisit the perturbation theory of electromagnetic resonance.
Challenges for Designing Large-scale Integrated Photonics
1Ghent University – IMEC, 9000 Ghent , Belgium
2Luceda Photonics, 9200 Dendermonde, Belgium
With the growing adoption of silicon photonics in data- and telecommunication as well as sensing and spectroscopy, the difficulties of designing larger circuits in this technology have become more prominent. Silicon photonic waveguides have submicron dimensions, and can therefore be integrated in large numbers on a chip. But these same submicron dimensions give rise to extreme sensitivity of the waveguide response to small variations in geometry, temperature, stress etc. Multiply this with thousands of functional building blocks and even more interconnects, and it is clear that it becomes very challenging to guarantee the correct functionality of a photonic integrated circuit. Even if the circuit is nominally correct, compound variability can still dramatically lower the yield.