Design and use of integrated optics circuit for biosensing applications
In the last years, photonic integrated circuits (PICs) have passed from a research topic into a technology used in many commercial products. This big step permits to companies to produce and sell top-level products, for example in telecommunication fields, where important multinational companies started to commercialized 100 Gbps, or even 500 Gbps, Transmitter Optical Module, which is essential for the next generation of internet application such as Internet of Things or 5G development. Moreover, there are other fields where PICs started to be the core of commercial products, such as thermal sensors or biochemical detectors. All these opportunities were possible due to many factors: first of all, the diffusion of high-quality design software that permits to design, simulated and compare many different PIC typologies. Another important step was the development of a novel solution for controlling and tuning of a specific part of the PIC, such as the CLIPP concept developed in Politecnico, together with ad-hoc electronics that implement the "smart" part of the controlling level. The last important step that permits a commercial diffusion of the PICs was the reliability of the fabrication process so that even multi-layer large-scale wafer can be produced with a very high-quality standard.With this Ph.D, we aim to study a ways to design and use complex PICs as biosensors. This goal represents the latest field where PIC can improve the state-of-the-art since other technologies reached limits as concentration starts to be really low. In order to achieve this goal, the Ph.D. will focus on: (1) Design and testing of complex feedback network to prove the possibility of detecting small changes in PIC due to biological events. (2) Design and testing of complex PICs where novel materials are used to improve the detection limits of optical detection. (3) Design and support on the packaging side of the PICs, with the use of ad-hoc multi-physic simulations, in order to place both photonic and electronic chips in the same package. Most of the activities will be carry out in the new Polifab laboratory and inside the Integrated Photonic Devices Group, where different active European Projects permit to have a reliable network of universities and laboratories to develop these research topics. Moreover, important projects with national and international companies will be an important part of this Ph.D. in order to continue to push the commercialization of photonic integrated devices.
Supervisor: MELLONI ANDREA IVANO
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