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Two-Photon Excitation Spectroscopy of Silicon Quantum Dots and Ramifications for Bio-Imaging
Brandon J. Furey, Benjamin J. Stacy, Tushti Shah +6
Two-photon excitation in the near-infrared (NIR) of colloidal nanocrystalline silicon quantum dots (nc-SiQDs) with photoluminescence also in the NIR has the potential to open up ne…
Faraday rotation study of plasma bubbles in GeV wakefield accelerators
Y. Y. Chang, X. Cheng, A. Hannasch +8
We visualize plasma bubbles driven by 0.67 PW laser pulses in plasma of density by imaging Faraday rotation patterns imprinted on linea…
Collection of Propagating Electromagnetic Fields by Uncoated Probe
Farbod Shafiei, Michael C. Downer
Understanding light-matter interaction at the nanoscale by observation of fine details of electromagnetic fields is achieved by bringing nanoscale probes into the nearfield of ligh…
Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels
T. Silva, L. D. Amorim, M. C. Downer +4
Hollow plasma channels are attractive for lepton acceleration because they provide intrinsic emittance preservation regimes. However, beam breakup instabilities dominate the dynami…
Compact Spectral Characterization of 5-500 MeV X-rays from the Texas Petawatt Laser-Driven Plasma Accelerator
A. Hannasch, L. Lisi, J. Brooks +11
We reconstruct spectra of secondary x-rays generated from a 500 MeV - 2 GeV laser plasma electron accelerator. A compact (7.5 7.5 15 cm), modular x-ray calorimete…
Compact Spectroscopy of keV to MeV X-rays from a Laser Wakefield Accelerator
A. Hannasch, A. Laso Garcia, M. LaBerge +12
We reconstruct spectra of secondary X-rays from a tunable 250-350 MeV laser wakefield electron accelerator from single-shot X-ray depth-energy measurements in a compact (7.5 $\time…