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; color: black; mso-ansi-language: SV; mso-fareast-language: SV; mso-bidi-language: AR-SA;">Virtual Radar Simulations for Interior Sensing
<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; color: black; mso-ansi-language: SV; mso-fareast-language: SV; mso-bidi-language: AR-SA;">Master's Program: MPICT, Information and Communication Technology
Date and time: 10 December 2024, 13.00 Location: B618/MC2
Supervisor: Filip Johansson, Internal Perception Team, Volvo Cars Examinar: Vessen Vassilev Opponent: Ann Priyanga Dhas
Abstract: This master’s thesis investigates the validation of radar simulation data for in-cabin sensing applications, utilizing AVxcelerate by Ansys to replicate and test real radar scenarios virtually. The research primarily focuses on comparing virtual radar readings from the simulation environment with real radar measurements gathered in a lab setting, aiming to ensure accuracy and consistency in radar data for future in-cabin safety applications. The findings contribute foundational insights for advancing radar-based occupant monitoring systems, supporting features like driver drowsiness detection and child presence alerts in automotive interiors.

Title: Tensile-strained crystalline aluminium nitride nanomechanical resonators
<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; color: black; mso-ansi-language: SV; mso-fareast-language: SV; mso-bidi-language: AR-SA;">Master's Program: MPNAT, Nanotechnology
Date and time: 19 December 2024, 10.00 Location: Kollektorn, MC2 Online: <a href="https://chalmers.zoom.us/j/65034416788">https://chalmers.zoom.us/j/65034416788</a>&nbsp;&nbsp;&nbsp; Password: 685005
Supervisor: Dr Anastasiia Ciers, Prof Witlef Wieczorek Examinar: Prof Witlef Wieczorek
Abstract: Abstract: High-Qm nanomechanical resonators have proven to be a promising platform for advancing quantum technology. Resonators with Qm x fm products exceeding 6.2 x 10^12 Hz can sustain at least one coherent oscillation at room temperature, enabling their use in emerging quantum applications such as engineering long-lived quantum states and quantum sensing. Silicon nitride has become the favored material in this regard due to its great mechanical properties. However, it is an amorphous material that lacks additional functionalization capabilities beyond its admirable mechanical characteristics. We therefore explore crystalline aluminum nitride (AlN) as a promising alternative platform for high-Qm nanomechanical resonators. Like other crystalline nitride materials, we expect AlN to possess robust mechanical properties. Moreover, the lack of centrosymmetry in its crystal structure gives rise to its piezoelectricity, making it a particularly versatile material for electromechanical applications. In this thesis, we studied four tensile-strained crystalline aluminum nitride samples with thickness ranging from 90 nm to 295 nm. We extracted their elastic properties, including Young's modulus, residual stress, and intrinsic quality factor. &nbsp;We then designed and realized phononically-shielded high-Qm nanomechanical resonators out of them. Our best-performing device achieved a quality factor of 8.6 x 10^6 and a Qm x fm product as high as 1.5 x 10^13, sufficient to provide a coherent oscillation at room temperature.

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Presentation of master thesis

Master and Bachelor thesis presentations at Microtechnology and Nanoscience

10 December 2024

13.00 Surya Naga Maruthi Ramya Mallipudi Venkata Satya, MPICT

19 December 2024

10:00 Laurentius Radit Nindito, MPNAT