1963
DOI: 10.1103/physrev.130.2193
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Infrared Absorption at Longitudinal Optic Frequency in Cubic Crystal Films

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Cited by 1,000 publications
(520 citation statements)
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“…Again, the term LO is used because the vibrations produce a surface polarization which results in an electric field normal to the surface equal to that component of polarization, and opposite in direction, so that the absolute value of ε * reaches a minimum. As shown by Berreman [69] and Fuchs and Kliewer [70] for a sufficiently thin film deposited on a metallic substrate the vibrations parallel to the surface (TO modes) are completely suppressed using p-polarized light. This is because the vibrational dipole moment of the TO modes is entirely suppressed by the response of the metal substrate underneath the film.…”
Section: Vibrational Spectroscopy: Experiments Vs Theorymentioning
confidence: 91%
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“…Again, the term LO is used because the vibrations produce a surface polarization which results in an electric field normal to the surface equal to that component of polarization, and opposite in direction, so that the absolute value of ε * reaches a minimum. As shown by Berreman [69] and Fuchs and Kliewer [70] for a sufficiently thin film deposited on a metallic substrate the vibrations parallel to the surface (TO modes) are completely suppressed using p-polarized light. This is because the vibrational dipole moment of the TO modes is entirely suppressed by the response of the metal substrate underneath the film.…”
Section: Vibrational Spectroscopy: Experiments Vs Theorymentioning
confidence: 91%
“…Additionally, in the infinite cubic crystal the LO phonons induce a longrange electric field in the crystal which opposes the motion of the ions thus increasing the ω LO frequency as compared to ω TO [71,72]. In analogy with the infinite crystal, the TO and LO terminology has also been used for a crystalline film [69,70]. The film has two normal modes of polarized lattice vibrations with the wavelength much greater than the film thickness.…”
Section: Vibrational Spectroscopy: Experiments Vs Theorymentioning
confidence: 99%
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“…
We observe unique absorption resonances in silver/silica multilayer-based epsilon-near-zero (ENZ) metamaterials that are related to radiative bulk plasmon-polariton states of thin-films originally studied by Ferrell (1958) and Berreman (1963). In the local effective medium, metamaterial description, the unique effect of the excitation of these microscopic modes is counterintuitive and captured within the complex propagation constant, not the effective dielectric permittivities.
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mentioning
confidence: 97%
“…These radiative bright modes exhibit properties in stark contrast to conventional dark modes of thin-film media (surface plasmon polaritons). The unique absorption resonances manifested in our metamaterials were originally studied by Ferrell in 1958 for plasmon-polaritonic thinfilms in the ultraviolet [10], and by Berreman in 1963 for phonon-polaritonic thin-films in the mid-infrared spectral region [11]. Surprisingly, two research communities have developed this independently with little communication or overlap until now: we therefore address these resonances as Ferrell-Berreman (FB) modes of our metamaterials.…”
mentioning
confidence: 99%