Ultrafast microscopy of surface electromagnetic fields

Details Ultrafast microscopy of surface electromagnetic fields Ultrafast microscopy of surface electromagnetic fields

2008-08-27

2011-12-27

Lee, Hwa (Department: 2886)

Optics: measuring and testing

By light interference

Reexamination Certificate

active

08085406

ABSTRACT:
System(s) and method(s) to probe electromagnetic fields at the surface of a solid-state material are provided. The technique combines ultrafast (e.g., less than 10 fs) optical excitation and electron microscopy to generate electronic excitations and image the ensuing electromagnetic fields with nanometer-scale spatial resolution and femtosecond time-scale resolution. In addition, time-of-flight energy analysis facilitates imaging of relaxation a generated electronic excitation. The dynamics of the electromagnetic fields can be probed interferometrically through generation of multi-frame imaging, with inter-frame frequency of the order of a few hundreds of attoseconds, of interference patterns among an electric field associated with an excitation in a sample or device and the electromagnetic field of a probe pulse coherent with an excitation pulse. Quality assurance of nanoscopic devices based on plasmonic, photonic, electronic, spintronic operation can be analyzed with spectroscopy provided in the subject innovation.

REFERENCES:
Atsushi Kubo, Ken Onda, Hrvoje Petek, Zhijun Sun, Yun Suk Jung, and Hong Koo Kim, “Imaging of localized silver plasmon dynamics with sub-fs time and nano-meter spatial resolution,” in Ultrafast Phenomena XIV. T. Kobayashi, (2005) pp. 645-649, T. Okada, T. Kobayashi, K. Nelson, and S. De Silvestri eds., Springer-Verlag, Berlin (invited talk and proceedings).
A. Kubo, K. Onda, H. Petek, Z. Sun, Y.-S. Jung, and H.-K. Kim, “Femtosecond imaging of surface plasmon dynamics in a nano-structured silver film,” (2005), 1123-1127, Nano Lett. 5.
A. Kubo, K. Onda, H. Petek, Z. Sun, Y.-S. Jung, and H.-K. Kim, “Femtosecond imaging of surface plasmon dynamics,” (2005), 3-4, SPIE Nanotechnology e-newsletter, 8.
Atsushi Kubo, Yun Suk Jung, Hong Koo Kim and Hrvoje Petek, J. Phys. B: “Femtosecond microscopy of localized and propagating surface plasmons in silver gratings,” (2007), S259-S272, Journal of Physics B: Atomic, Molecular and Optical Physics, United Kingdom.
Atsushi Kubo, Niko Pontius, and Hrvoje Petek, “Femtosecond Microscopy of Surface Plasmon Polariton Wave Packet Evolution at the Silver/Vacuum Interface,” (2007), 470-475, Nano Lett. 5.

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