Microtechnology and Nanoscience

Title: <span style="font-size: 12.0pt; font-family: 'Aptos',sans-serif; mso-fareast-font-family: Aptos; mso-fareast-theme-font: minor-latin; mso-bidi-font-family: Aptos; mso-ligatures: standardcontextual; mso-ansi-language: EN-US; mso-fareast-language: SV; mso-bidi-language: AR-SA;" lang="EN-US">Design and characterisation of terahertz planar&nbsp;hybrids
Date and time: 2 June 2025, 12.45 Location: A604, MC2
Supervisor: Jan Stake&nbsp; Examiner: Jan Stake Opponent: David Klerebladh
Abstract: TBA
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Title: D-Band Transition from eWLB to Polymer Microwave Fiber: Design, Fabrication, and Characterization
Date and time: 2 June 2025, 15.00 Location: C511, MC2
Supervisor: Frida Strömbäck<span style="font-size: 12.0pt; font-family: 'Aptos',sans-serif; mso-fareast-font-family: Aptos; mso-fareast-theme-font: minor-latin; mso-bidi-font-family: Aptos; mso-ansi-language: SV; mso-fareast-language: SV; mso-bidi-language: AR-SA;">&nbsp; Examiner: Herbert Zirath Opponent: Aditya Goturu
Abstract: This thesis investigates the design, fabrication, and characterization of coupling solutions between embedded wafer-level ball grid array (eWLB) packages and polymer microwave fibers (PMFs) for sub-terahertz communication, specifically targeting the 130–150 GHz portion of the D-band frequency range (110–170 GHz). PMFs offer a promising low-loss alternative to traditional waveguides and free-space transmission for short-range, high-data-rate applications. However, the current coupling solution—using an in-package Vivaldi antenna—suffers from high transition losses.
To address this, a dielectric coupling structure is proposed, designed to enhance electromagnetic field confinement and better match the modal profile of the PMF. The coupling system, including a back-to-back simulation setup, is modeled and optimized using the full-wave electromagnetic simulation tool High Frequency Structure Simulator (HFSS). The physical structure is fabricated using 3D printing in acrylonitrile butadiene styrene (ABS), and its performance is verified through vector network analyzer (VNA) measurements.
The average measured coupling improvement over the 130–150 GHz range is 0.87 dB, which is in good agreement with the simulation results. A maximum measured improvement of 2.2 dB is observed at 134 GHz.

Title: <span style="font-size: 12.0pt; font-family: 'Aptos',sans-serif; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: Aptos; mso-ansi-language: SV; mso-fareast-language: SV; mso-bidi-language: AR-SA;">A vacuum integrated fiber Fabry-Pérot cavity setup for optical and optomechanical characterisation
Date and time: 5 June 2025, 15.00 Location: Kollektorn, MC2
Supervisor: Hannes Pfeifer&nbsp; Examiner: Witlef Wieczorek Opponent: Pontus Lindgren
Abstract: TBA

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Presentation of master thesis

Master and Bachelor thesis presentations at Microtechnology and Nanoscience

2 June 2025

13:15 Aditya Goturu, MPWPS

15:00 David Klerebladh, MPWPS

5 June 2025

15:00 Johanna Örgård, MPPHS