Athermal Photonic Waveguide With Refractive Index Tuning
Data di pubblicazione
Data di priorità
DIPARTIMENTO DI ELETTRONICA, INFORMAZIONE E BIOINGEGNERIA
Andrea Melloni, Stefano Grillanda, Francesco Morichetti (PoliMi),A.Cianciamilla, A.M. Agarwal, L.C. Kimerling, J.Michel, V. Raghunathan, V. Singh (MIT)
The invention is a photonic integrated waveguide
which enables to achieve athermal operation
and trimming functionality simultaneously
. As shown in the figure, the invention comprises a core material (e.g. silicon) where the optical field propagates, an under-cladding material (e.g. silica), and a top cladding which includes a layer of a trimmable material (e.g. chalcogenide glass) and a layer for the thermo-optic compensation (e.g. polymer).
The structure of the waveguide enables to compensate the thermal dependence of the core waveguide thanks to the properties of the thermo-optic compensation layer
, and simultaneously to operate a post-fabrication trimming thanks to the presence of the trimmable material
. The dimensions of the core waveguide and the thicknesses of the layers are optimized in order to have the optical field expanding through the trimmable and the thermo-optic compensation layers. The originality and novelty of the invention is to obtain the two aforementioned functionalities (i.e. thermal compensation and post-fabrication trimming) simultaneously, with the same optical structure.
Campo di applicazione
The main areas of interest, both in the linear and nonlinear regime, are: <b>telecom, datacom, optical interconnect, biosensing, optical processing, and quantum photonics.</b>
The invention plays a fundamental role in the <b>control of optical circuits</b>, especially in <b>semiconductor</b>, and most importantly in <b>Silicon Photonics</b>. The invention enables Green Photonics with low power consumption devices, i.e. with:
a) no active heaters or coolers for the tuning of the devices,
b) no active heaters or coolers for the thermal stabilization of the devices.
Stadio di sviluppo