Poster Presentation – Brandon J. Furey

5 Oct 20235 Oct 2023

Molecular Quantum Science & Technology Conference 2024

TU Wien, Vienna, Austria

January 31 – February 2, 2024 at Atominstitut

Conference organizer

TU Wien and the University of Innsbruck will host the inaugural Molecular Quantum Science and Technology conference on January 31 – February 2, 2024 at TU Wien. It will bring together researchers exploring quantum information, quantum control, and quantum state spectroscopy of molecules. We encourage researchers who are studying the quantum properties of molecules or controlling the quantum state of individual molecules to attend and present at this conference. We aim to facilitate the exchange of ideas and promote collaboration between research groups. Topics include, but are not limited to:

Hybrid molecular quantum systems
Quantum information & error correction
Rovibronic spectroscopy using quantum logic
Quantum memory
Searches for new physics beyond the Standard Model

Registration is now open! Link to registration: https://mqst2024.conf.tuwien.ac.at/registration/

Link to conference website with more information: https://mqst2024.conf.tuwien.ac.at/

27 Mar 202329 Mar 2023

SFB BeyondC Workshop 2023

Wien Universität, Vienna, Austria

March 27, 2023 @ 4:00pm in Alte Kapelle

Precision spectroscopy and quantum information with trapped molecular ions

Brandon J. Furey, Stefan Walser, Zhenlin Wu, Rene Nardi, Guanqun Mu, and Philipp Schindler

Universität Innsbruck

We aim to demonstrate the creation of superpositions of rotational states in a diatomic
molecular ion built using a combination of microwaves and stimulated Raman transitions
driven by two beams from an optical frequency comb. This could pave the way for certain
quantum error correction codes which use a trapped molecule as the basis for a logical qubit.

Poster Session
4:00 PM–6:00 PM, Monday, March 27, 2023
Alte Kapelle

Link to more information: https://beyondc.at/fileadmin/user_upload/p_beyondc/Pictures/Workshop_2023/Book_of_Abstracts_Poster_Contributions_SFB_Kickoff_2.0.pdf

4 Jun 201929 Apr 2022

Optics of Surfaces and Interfaces 13

Centro de Investigaciones en Optica, Leon, Mexico

June 4, 2019 @ 5:10pm

Two-photon absorption spectroscopy and anisotropy of bulk III-V and IV semiconductors and quantum dots

Brandon J. Furey¹, Rodrigo M. Barba-Barba², Tushti Shah¹, Alan Bernal², Brian A. Korgel¹, Ramon Carriles², Bernardo S. Mendoza², Michael C. Downer¹

¹University of Texas at Austin, ²Centro de Investigaciones en Optica, A.C. Leon, Mexico

We previously reported results for the two-photon absorption (2PA) coefficient of silicon quantum dots (SiQD) at 800 nm using two-photon-induced photoluminescence (2PIP). SiQD have applications in bio-imaging due to the efficient emission of photoluminescence and non-toxicity, and excitation by 2PA enables deeper penetration depth and increased resolution. A first-principles theoretical model is under development to relate the 2PA response of bulk Si to SiQD and explain the spectral features and size dependence of 2PA in colloidal, ligand-passivated SiQD. Thus we need to understand the 2PA spectrum and anisotropy of bulk Si. The experimental procedure was tested with Gallium phosphide (GaP) since the spectral region of interest Τ 𝐸 𝑔 2 < ℏ𝜔 < 𝐸 𝑔 is in the visible. The 2PA coefficient of GaP was measured by open-aperture z-scan in the spectral range 650 – 1050 nm. Anisotropy in the polarization dependence of 2PA was measured by polarization rotation. Ongoing work using pump-probe spectroscopy to study GaP, Gallium arsenide (GaAs), bulk silicon (Si), and SiQD will allow characterization of all three independent 𝐼𝑚 𝝌 (3) components as determined by the crystallographic point groups of these materials.