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L Martin-Moreno

Publications and source records attributed to L Martin-Moreno.

5 recordsLinked to original sources
PubMed2006

Channel plasmon-polaritons: modal shape, dispersion, and losses.

We theoretically study channel plasmon-polaritons (CPPs) with a geometry similar to that in recent experiments at telecommunication wavelengths [Bozhevolnyi et al., Nature 440, 508 (2006)]. The CPP modal shape, dispersion relation, and losses are simulated by using the multiple multipole method and the finite difference time domain technique. It is shown that, with an increase of the wavelength, the fundamental CPP mode shifts progressively toward the groove opening, ceasing to be guided at the groove bottom and becoming hybridized with wedge plasmon-polaritons running along the groove edges.

Journal Article↗
PubMed2002

Beaming light from a subwavelength aperture.

Light usually diffracts in all directions when it emerges from a subwavelength aperture, which puts a lower limit on the size of features that can be used in photonics. This limitation can be overcome by creating a periodic texture on the exit side of a single aperture in a metal film. The transmitted light emerges from the aperture as a beam with a small angular divergence (approximately +/-3 degrees ) whose directionality can be controlled. This finding is especially surprising, considering that the radiating region is mainly confined to an area with lateral dimensions comparable to the wavelength of the light. The device occupies no more than one cubic micrometer and, when combined with enhanced transmission, suggests that a wide range of photonic applications is possible.

Journal Article↗
PubMed1990

Another CHILD syndrome with xanthomatous pattern.

We report on a patient with verruciform xanthoma lesions in an epithelial nevus and developmental anomalies since birth that may be classified as CHILD syndrome (congenital hemidysplasia with ichthyosiform erythroderma and limb defects). Histological analyses of the lesion revealed verrucous features with acanthosis, hyperkeratosis, parakeratosis and the typical infiltrate of xanthomatous cells in dermal papillae. To our knowledge only 5 cases of verruciform xanthoma on epidermal nevus have been reported to date. In our view, the present case of CHILD syndrome is the first reported in which xanthomatous transformation has been revealed in biopsies taken when the girl was a baby.

Abnormalities, Multiple↗