1 / 23

Development of a High-Sensitivity Pump-Probe Fast Scanning Delay Line

Development of a High-Sensitivity Pump-Probe Fast Scanning Delay Line. Stephanie Majewski University of Illinois @ Urbana-Champaign University of Florida Faculty Mentor: Professor David Reitze. Introduction. Femtosecond “LASER”s Pump-Probe Spectroscopy Lock-in Method Fast-Scan System.

walterperez
Download Presentation

Development of a High-Sensitivity Pump-Probe Fast Scanning Delay Line

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. Development of a High-Sensitivity Pump-Probe Fast Scanning Delay Line Stephanie Majewski University of Illinois @ Urbana-Champaign University of Florida Faculty Mentor: Professor David Reitze

  2. Introduction • Femtosecond “LASER”s • Pump-Probe Spectroscopy • Lock-in Method • Fast-Scan System

  3. Femtosecond Lasers 1 fs = 0.000 000 000 000 001 s

  4. What Happens in 100 Femtoseconds? • Light Travels 30 μm • Electrons Collide With Electrons • Solids Begin to Melt Under Laser Irradiation • Chemicals Dissociate There are about as many femtoseconds in a minute as there are minutes in the age of the universe.

  5. Project Objectives • Characterize Motion of Shaker • Design Mirror Mount • Optimize Performance of Shaker- Mount System • Implement System in Pump-Probe Experiment

  6. The “Shaker”

  7. Mirror Mount

  8. Obstacles ... • Elliptical Beam Shape • Unstable Mirror Mount • Wobble in Drive Arm of Shaker

  9. Solutions! • Uniform Bolt Force on Mirror Yielded Circular Beam Shape, Mirror Rattle Minimized • Extra Screw Added Stability to Mount • Beam Jitter Corrected Optically

  10. Time-Resolved Nanotube Transmission Measurement • Achieved successful fast-scan system implementation in pump-probe experiment • Measurement itself unsuccessful due to intrinsic scattering of sample • In future, can try using cross-polarization and other methods to reduce scattering.

  11. Conclusion • Developed Shaker Design for Fast Scanning System • Characterized Shaker Motion and Corrected Beam Jitter to Within Acceptable Limits • Implemented Shaker in Time-Resolved Carbon Nanotube Transmission Measurement

  12. Acknowledgements Professor David Reitze Mark Moores and Anatoly Efimov Drs. Kevin Ingersent and Alan Dorsey NSF Research Experience for Undergraduates

More Related