CMOS and beyond CMOS
Discover why imec is the premier R&D center for advanced logic & memory devices. anced logic & memory devices.
Connected health solutions
Explore the technologies that will power tomorrow’s wearable, implantable, ingestible and non-contact devices.
Life sciences
See how imec brings the power of chip technology to the world of healthcare.
Sensor solutions for IoT
Dive into innovative solutions for sensor networks, high speed networks and sensor technologies.
Artificial intelligence
Explore the possibilities and technologies of AI.
More expertises
Discover all our expertises.
Research
Be the first to reap the benefits of imec’s research by joining one of our programs or starting an exclusive bilateral collaboration.
Development
Build on our expertise for the design, prototyping and low-volume manufacturing of your innovative nanotech components and products.
Solutions
Use one of imec’s mature technologies for groundbreaking applications across a multitude of industries such as healthcare, agriculture and Industry 4.0.
Venturing and startups
Kick-start your business. Launch or expand your tech company by drawing on the funds and knowhow of imec’s ecosystem of tailored venturing support.
/Job opportunities/Advanced Sub-Micrometer Patterning Methods for Perovskite-based Lasers

Advanced Sub-Micrometer Patterning Methods for Perovskite-based Lasers

Research & development - Leuven | More than two weeks ago

Contribute to the realization of a thin-film injection laser that will enable a plethora of new applications!

Organometal halide and all-inorganic perovskite semiconductors have recently emerged as highly promising and inexpensive materials for solar cells, photodetectors, displays, and lasers. This rapid advancement has become possible due to their remarkable optoelectronic properties (direct bandgap and high absorption coefficient, sharp optical band edge, defect tolerance, high ambipolar carrier mobility) coupled to facile low-temperature processing such as spin-coating. ULTRA-LUX project and this work have the ambition to enable high-brightness perovskite-based light-emitting diodes and injection lasers. The realization of the latter would enable a variety of new applications such as industry-relevant on-chip light sources integrated into common CMOS photonic platforms, Lab-on-a-Chip devices, or advanced spectroscopy. To enable electrical lasing, perovskite semiconductors were selected over organic and colloidal quantum-dot active layers due to the lack of excessive losses of electron-hole pairs when pumped electrically.

To enable a lasing structure, perovskite gain medium must be integrated into the resonator that would support the light feedback. Among ultra-low-loss photonics resonators, distributed feedback (DFB) reflector has been widely studied to be incorporated in perovskite gain medium because of its single-mode operation and tunability. Due to the air and water instability of perovskite semiconductors and their susceptibility to most of the common solvents, the use of conventional wet-chemistry lithography techniques is very limited. To create DFB reflectors and other 2D photonic bandgap structures, we will utilize in this work the bottom up and top-down nanoimprint lithography patterning methods that do not involve perovskite solvent exposure.

Together with senior colleagues, the selected candidate will apply the proposed patterning techniques to a variety of metal halide perovskites, characterize lasing and amplified spontaneous emission (ASE) thresholds together with other optoelectronic properties. Low ASE and lasing thresholds are among the most important metrics for a successful nanolithography process. We will further integrate obtained perovskite resonator structures into a complete electrical device to investigate the feasibility of electrical lasing using nanoimprint lithography.

.

Type of project: Thesis, Internship

 

Duration: 6-9 months

Required degree: Master of Engineering Science, Master of Science, Master of Engineering Technology

Required background: Nanoscience & Nanotechnology, Physics, Materials Engineering

Supervising scientist(s): For further information or for application, please contact: Iakov Goldberg (Iakov.Goldberg@imec.be) and Robert Gehlhaar (Robert.Gehlhaar@imec.be) and Itai Lieberman (Itai.Lieberman@imec.be)

Imec allowance will be provided for students studying at a non-Belgian university.