1 / 2

Irvin, Fodor, Levy , Opt. Express 15 , 11756 (2007)

Resolving Electron Spin Dynamics Using Continuous Light Jeremy Levy, University of Pittsburgh, DMR-0602846.

zuzela
Download Presentation

Irvin, Fodor, Levy , Opt. Express 15 , 11756 (2007)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Resolving Electron Spin Dynamics Using Continuous LightJeremy Levy, University of Pittsburgh, DMR-0602846 We have developed a method for measuring electron spin dynamics with sub-nanosecond time resolution, transform-limited spectral selectivity, and phase-sensitive (lock-in) detection. Use of a continuous-wave (CW) laser and fast optical bridge enables greatly improved signal-to-noise characteristics compared to traditional optical sampling (pump-probe) techniques. Simulations have shown that an improvement of up to 104 in signal-to-noise ratio is possible. We demonstrate the technique with a measurement of GHz-spin precession in n-GaAs. This approach may also be applicable to other physical systems where stroboscopic techniques cannot be used because of either noise or spectral limitations. (c) Acquired Kerr rotation (KR) data for n-GaAs as a function of the delay time and external magnetic field. Irvin, Fodor, Levy, Opt. Express 15, 11756 (2007)

  2. Broader Impact: Undergraduate Research George Kaiser (REU student) • Developed hardware and software for XY slip-stick stage in low-temperature microscope • Calibrated motion (nm/step) as a function of drive amplitude • Characterized capacitance vs. voltage of InAs quantum dots supplied by Gilberto Medeiros-Ribeiro (MWN collaborator) Jeremy Levy, University of Pittsburgh, DMR-0602846, REU-0649184 (c) Top: Image of XY slip-stick stage for use in a low-temperature optical microscope. Bottom: Graph showing microns/step for motion of XY stage as a function of drive voltage amplitude. Motion begins a very low drive amplitudes (<5% of full scale)

More Related