Nanophotonics Theory Group: Post-doctoral position in design of integrated photonic waveguides with optimum in/out-coupling to light

Institute of Photonic Sciences, Spain

Updated: about 18 hours ago
Deadline: ;

ICFO is offering a postdoctoral position to a well-qualified, highly motivated and dynamic young scientist who wishes to enhance his/her scientific career in a friendly and stimulating environment.

The successful candidate will be joining the Nanophotonics Theory group led by Prof. Dr. Javier Garcia de Abajo.

We aim to design waveguides integrated within a planar geometry, incorporating efficient in- and out-couplers to interface with external light sources. This architecture will serve as a platform for developing both optical sensors and optical signal processors, leveraging existing integrated photonics technologies. The approach focuses on using mature and commercially available photonic integration solutions to ensure scalability, compatibility, and cost-effectiveness.

The project requires extensive electromagnetic modeling to optimize the waveguide structures for minimal loss, efficient confinement, and effective mode matching with external optical components. Particular attention will be given to the design of couplers that enable low-loss light injection and extraction, which are critical for device performance. In addition to waveguide optimization, the work involves comprehensive simulations of the proposed functionalities, including the waveguide ability to detect the presence of analytes.

These sensing capabilities will be explored through both optical absorption mechanisms and phase modulation effects, which can be interrogated using on-chip interferometric configurations such as Mach-Zehnder interferometers. By quantifying changes in the guided mode due to the interaction with analytes, we aim to establish a foundation for compact, sensitive, and fast photonic sensing devices. The same waveguide platform will also be evaluated for use in signal processing applications, where phase-sensitive elements can enable filtering, switching, or modulation functionalities within an integrated photonics framework.


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