Time-refraction near the critical angle and angular streaking with attosecond resolution [Invited]

Colton Fruhling; Mustafa Goksu Ozlu; Ohad Segal; Wallace Jaffray; Sven Stengel; Marcello Ferrera; Alexandra Boltasseva; Mordechai Segev; Vladimir M. Shalaev

doi:10.1364/OME.553662

Time-refraction near the critical angle and angular streaking with attosecond resolution [Invited]

Colton Fruhling, Mustafa Goksu Ozlu, Ohad Segal, Wallace Jaffray, Sven Stengel, Marcello Ferrera, Alexandra Boltasseva, Mordechai Segev, Vladimir M. Shalaev

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Abstract

We study the time-refraction of optical waves as they propagate through a time-varying slab and find the frequency shift associated with the abrupt change in the refractive index. We discover a geometrical mechanism responsible for an ultrafast blueshift followed by a redshift, occurring while the refractive index is increased monotonically. Furthermore, we find high sensitivity to incident angles near the traditional critical angle and unravel a new critical angle that varies in time. Finally, we introduce an innovative concept of a streak camera design that utilizes ultrafast nonlinearities in time-varying media and offers attosecond resolution capabilities.

Original language	English
Pages (from-to)	1065-1075
Number of pages	11
Journal	Optical Materials Express
Volume	15
Issue number	5
Early online date	29 Apr 2025
DOIs	https://doi.org/10.1364/OME.553662
Publication status	Published - 1 May 2025

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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abstract = "We study the time-refraction of optical waves as they propagate through a time-varying slab and find the frequency shift associated with the abrupt change in the refractive index. We discover a geometrical mechanism responsible for an ultrafast blueshift followed by a redshift, occurring while the refractive index is increased monotonically. Furthermore, we find high sensitivity to incident angles near the traditional critical angle and unravel a new critical angle that varies in time. Finally, we introduce an innovative concept of a streak camera design that utilizes ultrafast nonlinearities in time-varying media and offers attosecond resolution capabilities.",

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AU - Fruhling, Colton

AU - Ozlu, Mustafa Goksu

AU - Segal, Ohad

AU - Jaffray, Wallace

AU - Stengel, Sven

AU - Ferrera, Marcello

AU - Boltasseva, Alexandra

AU - Segev, Mordechai

AU - Shalaev, Vladimir M.

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N2 - We study the time-refraction of optical waves as they propagate through a time-varying slab and find the frequency shift associated with the abrupt change in the refractive index. We discover a geometrical mechanism responsible for an ultrafast blueshift followed by a redshift, occurring while the refractive index is increased monotonically. Furthermore, we find high sensitivity to incident angles near the traditional critical angle and unravel a new critical angle that varies in time. Finally, we introduce an innovative concept of a streak camera design that utilizes ultrafast nonlinearities in time-varying media and offers attosecond resolution capabilities.

AB - We study the time-refraction of optical waves as they propagate through a time-varying slab and find the frequency shift associated with the abrupt change in the refractive index. We discover a geometrical mechanism responsible for an ultrafast blueshift followed by a redshift, occurring while the refractive index is increased monotonically. Furthermore, we find high sensitivity to incident angles near the traditional critical angle and unravel a new critical angle that varies in time. Finally, we introduce an innovative concept of a streak camera design that utilizes ultrafast nonlinearities in time-varying media and offers attosecond resolution capabilities.

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JO - Optical Materials Express

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ER -

Time-refraction near the critical angle and angular streaking with attosecond resolution [Invited]

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