The list below includes some recent side-projects I worked on in my free time.
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Topology Optimized 90° Bend
We use topology optimization to design a compact, efficient 90° photonic waveguide bend from first principles using BEAMZ. The optimizer maximizes bidirectional transmission through the bend by iteratively updating the refractive index distribution within a defined design region, using the adjoint method with a material penalty to control core material usage.
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Field-Dependent THz Transport Nonlinearities in Semiconductor Nano Structures
Quentin Wach,Michael T. Quick,Sabrine Ayari,Alexander W. Achtstein
The charge transport in semiconductor quantum dots and nanorods is studied theoretically, predicting strong field-dependent nonlinear mobility effects and intra-pulse gain. We studied the temperature- and size-sensitive mobility spectra, crucial for applications like 6G tech and nano electronics in general.
PCCP -
Analog Computing: Neurons & Chaotic Attractors
A tiny analog computing unit on a PCB is built that allows to dynamically simulate the popular chaotic Lorenz system. This aims to give a short introduction to the power of analog computing.
80% complete. -
THz Response of Charge Carriers in Nanoparticles
Michael T. Quick,Quentin Wach,Nina Owschimikow,Alexander W. Achtstein
Presenting a new quantum mechanical theory that models the THz mobility of charge carriers in low-dimensional semiconductors, revealing nonlinearities even at low field-strengths as well as a quantum mechanical equilibration current that counteracts the mobility at low frequencies.
Advanced Photonics Research -
Image Ranker: The Web App for Fast Ranking of Large Image Collections
Training generative image models requires a way to compare images and provide feedback on which images are better. I built a web app to do just that using the TrueSkill algorithm for accurate and fast Bayesian ranking and various other features.
star 72 -
BEAMZ: Fast and Easy Electromagnetic Simulation and Inverse Design.
This Python package is built to support multiple backends (e.g. for GPU acceleration), features a high-level API that enables fast prototyping and design with just a few lines of code, includes live visualization of your 3D designs and real-time field propagation, while also providing its own FDTD and FDFD eigen-mode solvers.
star 17 -
Analog IC Design & Engineering Course
A complete and indepth course to learn VLSI analog and hybrid IC design using Verilog AMS for the hardware description and SPICE for simulating it.