/Phase modulated perovskite lasers

Phase modulated perovskite lasers

PhD - Leuven | More than two weeks ago

Control the gain in perovskite thin film lasers and laser arrays and modulate their far-field emission pattern

Introduction

Thin film lasers are on the verge of showing stimulated emission not only by optical pumping but also by purely electrical excitation. Passing that milestone, this technology can provide fully wafer integrated light sources. Furthermore, thin film processes enable high speed large area coatings. Therefore, thin film laser diodes can be the first large area surface emitting lasers opening new application tracks. With the coupling of multiple resonators one can get access to the phase of the individual emitters and the array. In the proposed PhD project, we want to develop such phase control strategies by modulating the gain in the active medium.

Within an unprecedented short time, lead halide perovskites have been proven to be viable candidates for active materials in future optoelectronic devices. They show extraordinary performance as gain media in thin film lasers and withstand extremely high current densities under electrical pumping. At imec, we produce state-of-the-art perovskite thin film lasers and have sophisticated electro-optical characterization setups to gain a deep understanding of these systems.

It is the goal of this PhD, to combine individual resonators to generate additional functionalities beyond the standard properties of laser light.

Topic

This PhD is highly experimental and consists of two parts: thin film device fabrication and characterization. You feel comfortable in a lab environment working with solution based and vacuum processes and electrical and optical characterization tools. You are interested in applying lithography to create resonators that you have designed. Overall, you are curious and motivated to explore the fascinating world of perovskite lasers and with their wide range of potential applications – all this in the environment of a leading research institution. Together we define the relevant target parameters to ensure an efficient development process.

At all stages of the work, you can rely on the support of our highly skilled team of engineers and scientists.

The candidate

You have recently finished your studies with a master’s degree in material science, semiconductor physics, electrical engineering, nano-engineering, or related. You are highly motivated to dive with us into the world of thin film processing for optoelectronic devices. You are a hands-on person in a lab environment and have creativity that helps you in problem solving and data analysis. You are a team player and have good communication skills as you will work in a multidisciplinary and multicultural team. You have the chance to regularly present your results thus getting guidance and feedback from our team. Given the international character of imec, an excellent knowledge of English is a must.


Required background: physics, electrical engineering, material science.

Type of work: 10% literature study, 70% experimental, 20% modeling

Supervisor: Jan Genoe

Daily advisor: Robert Gehlhaar

The reference code for this position is 2023-133. Mention this reference code on your application form.

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