Synthesis and characterization of space-time wave packets: A new class of pulsed optical beams (Conference Presentation)

Basanta Bhaduri; Murat Yessenov; Esat Kondakci; Ayman Abouraddy

doi:10.1117/12.2513504

4 March 2019 Synthesis and characterization of space-time wave packets: A new class of pulsed optical beams (Conference Presentation)

Basanta Bhaduri, Murat Yessenov, Esat Kondakci, Ayman Abouraddy

Author Affiliations +

Proceedings Volume 10908, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX; 109080K (2019) https://doi.org/10.1117/12.2513504
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

The fundamental limits set by diffraction in optics have motivated the investigation of ‘diffraction-free’ beams. Examples of monochromatic diffraction-free beams include those whose profiles conform to Bessel, Mathieu, Weber, and Airy functions. For pulsed beams (wave packets or optical bullets), different functional forms of the field in space and time have been found to be propagation-invariant. Here we describe experiments on the synthesis and characterization of a unique class of pulsed optical beams called ‘space-time’ (ST) wave packets that are diffraction-free and dispersion-free in free space. The most salient features of such wave packets that determines their characteristics is the tight spatio-temporal spectral correlations underlying their construction. We identify 10 unique classes of ST wave packets according to the magnitude and sign of the group velocity, and whether the ST wave packet is ‘baseband’ or ‘sideband’; that is, whether low spatial frequencies are allowed in the wave-packet construction or are forbidden. Such wave packets can be propagation invariant even for extended distances. Furthermore, sculpting the spatio-temporal spectrum of the wave packet allows control over its propagation characteristics in optical materials, namely over the group velocity and group velocity dispersion, whether the material itself is dispersive or non-dispersive.

Conference Presentation

Citation Download Citation

Basanta Bhaduri, Murat Yessenov, Esat Kondakci, and Ayman Abouraddy "Synthesis and characterization of space-time wave packets: A new class of pulsed optical beams (Conference Presentation)", Proc. SPIE 10908, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX, 109080K (4 March 2019); https://doi.org/10.1117/12.2513504

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KEYWORDS

Wave propagation

Free space optics

Diffraction

Dispersion

Free space

Spatial frequencies

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