Wrocław University of Science and Technology Physics Seminar – Monday 16th of June 2025
We cordially invite you to Wrocław University of Science and Technology Physics Seminar on Monday 16th of June 2025 at 11:15 in room 322, building A-1, where there will be delivered a lecture:
New Types of Distributed Bragg Reflectors and Subwavelength High-Contrast
Gratings for Mid-Infrared Optoelectronic Applications
dr hab. inż. Marcin Motyka
Department of Experimental Physics, Wrocław University of Science and Technology
Please find an abstract below.
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In this talk, I will discuss a new class of distributed Bragg reflectors (DBRs) and subwavelength high-contrast gratings (HCGs) developed for mid-infrared optoelectronic applications. The first part of the presentation will focus on their role in the design and development of a novel type of laser: vertical-cavity surface-emitting lasers based on the quantum cascade scheme (QCVCSELs). I will present the theoretical foundations, preliminary material growth, and the optical properties of these structures as determined by spectroscopic analysis. In the second part, I will address the use of HCGs as transparent electrodes. I will discuss the performance parameters already achieved-such as transparency and electrical conductivity-and outline the prospects for further improvements. This research has been conducted as part of completed and ongoing projects funded by the National Science Centre and the National Centre for Research and Development, in collaboration with Polish and European scientific institutions.
