Condensed Matter Seminar (104 IATL) - Undergraduate Symposium

Apr 12, 2023

04:00 PM - 05:00 PM

Iowa Advanced Technology Laboratories, 104

205 North Madison Street, Iowa City, IA 52245

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University of Iowa Department of Physics and Astronomy

Condensed Matter Undergraduate Symposium

Telecom-Band Single-Photon Sources - Aden Hageman

Semiconductor quantum dots are efficient sources of single-photons that could be employed in practical quantum communication. However, conventional quantum dots sources emit in the near-infrared (~950 nm) where the fiber-optic transmission of light is very lossy due to optical absorption. Here, we demonstrate novel quantum dots in gallium antimonide that emit (~1430 nm) near the optimal telecom band, which could therefore enable long distance quantum communication. Through detailed spectroscopy and photon state characterization, we quantify the quality and intrinsic efficiency of these single-photon sources. Moving forward, we will embed the quantum dots in nanophotonic structures to boost the collection efficiency of photons into an optical fiber.

Characterizing the Optical Properties of Materials for Infrared Nanophotonics - Aditya Desai

Fourier-Transform Infrared spectroscopy allows the quantification of light reflected at different wavelengths. To characterize the optical properties of unknown materials, it is necessary to compare experimental data to data projected by a computer model based on material parameters. I created an optimization algorithm which adjusted the parameters within the model until the projection most accurately matched the experimental data and from that was able to characterize the inherent properties of materials.

Topological Magnons in Honeycomb Ferromagnets - Jeff Leiberton

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