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All-optical Magnetization Switching Mediated by Laser-induced Spin Current
21 May 2020 | | Contributor(s):: Satoshi Iihama
The manipulation of magnetization solely by the ultrashort laser pulse has attracted attention for future ultrafast and low-energy spintronics device [1-4]. GdFeCo has been predominant materials system showing all-optical single-shot magnetization switching. The magnetization switching of GdFeCo...
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A Phase-Changing Oxide for PS Silicon Photonics
03 Nov 2016 | | Contributor(s):: Richard Haglund
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Ultrafast Optical Measurements of Spin Polarization in Semiconductors
29 Mar 2016 | | Contributor(s):: Vanessa Sih
n this talk, I will describe optical techniques that can measure the magnitude and direction of spin-orbit fields and electrically-generated spin polarization in non-magnetic semiconductors and the modification of the electron spin precession frequency in a bulk semiconductor using an applied...
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Tracking Energy Flow From the Nano to Mesoscale with Ultrafast Nanoscopy
22 Mar 2016 | | Contributor(s):: Libai Huang
In this talk, I will discuss our recent efforts on elucidating multi-scale energy transfer, migration, and dissipation processes with simultaneous femtosecond temporal resolution and nanometer spatial resolution. We have combined/correlated ultrafast spectroscopy with high spatial resolution...
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[Illinois] Signal Processing at Light Speed: Ultrashort Optical Pulse Generation with Arbitrary Waveforms
29 Jan 2016 | | Contributor(s):: Claire Mcghee
We aim to further improve early detection of cancer biomarkers, including metal ion and small molecules, using functional DNA as the selective component for photonic crystal surface enhanced Raman scattering (PC-SERS) based detection. It is known that gold nanoparticles (AuNPs) display SERS...
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Ultrafast Photonic Signal Processing: A Quarter Century Perspective
28 May 2015 | | Contributor(s):: Andrew M Weiner
In this lecture I will begin with a brief introduction to ultrafast optics and specifically to methods permitting shaping of ultrafast laser fields on time scales too fast for direct electronic control. For contrast I will first provide some brief perspective on the state of my research around...
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Ultrafast & Broadband Photonic Signal Processing: From Microdevices to Control of RF Propagation
15 Jan 2013 | | Contributor(s):: Andrew M Weiner
This talk is part of the International Workshop "Novel Ideas in Optics: From Advanced Materials to Revolutionary Applications" hosted by Purdue University.
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Shaping Ultrafast Laser Fields for Photonic Signal Processing
06 Jun 2012 | | Contributor(s):: Andrew M Weiner
This talk will begin with a brief general introduction into ultrafast optics and then specifically address the topic of shaping ultrafast laser fields. Because the time scales involved are much too fast for direct application of (opto)electronic modulator technologies, all-optical approaches are...
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ECE 616 Lecture 30: Coherent Polarization Effects and Dephasing
12 Apr 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 9.6.
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ECE 616 Lecture 29: Ultrafast Spectroscopy
12 Apr 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 9.1-9.3.
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ECE 616 Lecture 27: Fourier Transform Pulse Shaping
12 Apr 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics 8.1
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ECE 616 Student Presentation: MIIPS - Pulse-Shaper Enabled Pulse Measurement and Shaping
05 Apr 2012 | | Contributor(s):: Liang Guo
Common ultrafast laser pulse characterization methods, such as autocorrelation, frequency-resolved optical gating (FROG), and spectral phase interferometry for direct electric-field reconstruction (SPIDER), can only measure the pulse characteristics, whose use is limited when measuring and...
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ECE 616 Lecture 26: Ultrashort Pulse Amplification
05 Apr 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 8.4.
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ECE 616 Lecture 25: Mode-Locked Frequency Combs
28 Mar 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 7.5.
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ECE 616 Lecture 24: Soliton Effects in Mode-Locked Lasers with Fast Self-Amplitude-Modulation
26 Mar 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 7.1.
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ECE 616 Student Presentation: Ultrafast Non-linear Plasmonics
02 Mar 2012 | | Contributor(s):: Gururaj V Naik
Plasmonics has gained significant attention in the recent days owing to its capability of providing sub-wavelength confinement of light. As a consequence of sub-wavelength confinement of electric field, the field intensity issignificantly enhanced. High field intensity achieved by plasmonics,...
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ECE 616 Student Presentation: Dual-Comb Spectroscopy
02 Mar 2012 | | Contributor(s):: Andrew J Metcalf
Dual comb spectroscopy is introduced, a technique that is basedon the beating of two frequency combs. A sample is first interrogated bythe combs before they are beat together via photodiode which down convertsthe signal from the optical to RF domain where it can be processed with electronics. A...
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ECE 616 Lecture 28: Space-time Duality and Temporal Imaging
16 Feb 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 8.3.
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ECE 616 Lecture 23a: High Order Propagation Effects - Delayed Nonlinear Index and Raman Scattering
15 Feb 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 6.7.
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ECE 616 Lecture 23b: High Order Propagation Effects - Delayed Nonlinear Index and Raman Scattering
15 Feb 2012 | | Contributor(s):: Andrew M Weiner
Related reading: Ultrafast Optics, 6.7.