Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Tunneling of femtosecond pulses through nanophotonic barriers: superluminal precursors

Not Accessible

Your library or personal account may give you access

Abstract

Amplitude–phase spectra of IR waves tunneling through a gradient dielectric nanophotonic barrier, found in the framework of an exactly solvable model of this medium, are used for optimization of superluminal reshaping of tunneling pulses. This barrier, characterized by a cut-off frequency Ω, determined by the shape of distribution of refractive index across the barrier, provides the tunneling regime for waves whose frequencies are less than Ω. In a spectral range, located nearby this cut-off frequency Ω, an almost reflectionless tunneling of these waves occurs, accompanied by large strongly dispersive phase shifts. These shifts outstrip in some spectral range the phase shifts accumulated by the same harmonics along the same way in free space. Depending on the detuning between the pulse carrier frequency ω0 and Ω, the interplay between superluminal (tunneling) and subluminal (transparent) harmonics results in an ultrafast reshaping of the transmitted waveform, yielding a pulse spatial broadening, formation of superluminal precursors at the front edge of the transmitted pulse, and the splitting of the pulse’s maximum, while the displacement of the center of gravity of reshaped pulse stays subluminal.

© 2011 Optical Society of America

Full Article  |  PDF Article
More Like This
Tunneling time of an optical pulse in a photonic bandgap

Rihei Endo and Riichiro Saito
J. Opt. Soc. Am. B 28(10) 2537-2542 (2011)

Non-local energy transport in tunneling and plasmonic structures

Winston Frias, Andrei Smolyakov, and Akira Hirose
Opt. Express 19(16) 15281-15296 (2011)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (22)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved