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Abstract The longitudinal and transverse angular shifts in the refraction of a paraxial beam are calculated by using the plane-wave decomposition of the amplitude of the electric field distribution of the incident beam. The transmission coeffici[...]texto impreso
Alda, Javier ; López-Alonso, José Manuel ; Boreman, Glenn ; Rico-García, José María | Puntex | 2005-05La investigación sobre el comportamiento de estructuras metálicas cuyo tamaño es comparable a la longitud de onda de la radiación detectada puede realizarse considerándolas como antenas detectoras de radiación óptica. El diseño, análisis y carac[...]texto impreso
Rico-García, José María ; Sánchez Brea, Luis Miguel ; Alda, Javier | The Optical Society Of America | 2008-02-20A tomographiclike method based on the inverse radon transform is used to retrieve the irradiance map of a focused laser beam. The results obtained from multiple knife-edge measurements have been processed through a kriging technique. This techni[...]texto impreso
We analyze the far-field intensity distribution of binary phase gratings whose strips present certain randomness in their height. A statistical analysis based on the mutual coherence function is done in the plane just after the grating. Then, th[...]texto impreso
FDTD algorithms are being used as a numeric tool for the analysis of photonic crystals. The definition of the modes associated with them is of interest for the study of the capabilities of photonic crystal devices. The Principal Component Analys[...]texto impreso
Rico-García, José María ; López-Alonso, José Manuel ; Alda, Javier | OSA (Optical Society of America) Publishing | 2005-05-16The manufacture of a photonic crystal always produce deviations from the ideal case. In this paper we present a detailed analysis of the influence of the manufacture errors in the resulting electric field distribution of a photonic crystal micro[...]texto impreso
Alda, Javier ; Rico-García, José María ; López-Alonso, José Manuel ; Lail, Brian | Elsevier | 2006-04-15The design of plane Fresnel zone plates, and binary-staircase kinoforms, has been analyzed in this paper for a non-imaging application aimed to increase the performance of point-like detectors. They maximize the irradiance at the focal point of [...]texto impreso
Alda, Javier ; Sánchez Brea, Luis Miguel ; Salgado Remacha, Francisco Javier ; Rico-García, José María | John Wiley & SONS INC | 2010-04A diffractive optical element having equal-width concentric square rings is analyzed in this article. This constant width makes possible its realization using spatial light modulators or square pixels phase screens. It allows a simple analytical[...]texto impreso
The far-field scattered in the infrared by an arrangement of metallic structures deposited on a dielectric wafer is estimated in this paper. The scattering is modelled by using operators that describe the far field obtained under the regime appl[...]texto impreso
Diffraction gratings are not always ideal but, due to the fabrication process, several errors can be produced. In this work we show that when the strips of a binary phase diffraction grating present certain randomness in their height, the intens[...]texto impreso
Rico-García, José María ; López-Alonso, José Manuel ; Lail, Brian ; Boreman, Glenn ; Alda, Javier | SPIE | 2004-12-06Fresnel Zone Plate Lenses (FZPLs) have been successfully coupled to infrared (IR) antennas producing a responsivity enhancement of about two orders of magnitude. However, their lateral extension may compromise their applicability in focal-plane-[...]texto impreso
A few years ago, some of the authors of the paper demonstrated the resonance of optical antennas in the visible frequencies. The results of that paper were obtained using experimental techniques that were primarily developed for the measurement [...]texto impreso
Silva López, Manuel ; Rico-García, José María ; Alda, Javier | The Optical Society Of America | 2012-10-08An experimental setup to measure the three-dimensional phase-intensity distribution of an infrared laser beam in the focal region has been presented. It is based on the knife-edge method to perform a tomographic reconstruction and on a transport[...]texto impreso
Alda, Javier ; Rico-García, José María ; López-Alonso, José Manuel ; Boreman, Glenn | Egyptian Society of Solid State Science & Applications | 2005Antenna-coupled optical detectors, also named as optical antennas, are being developed as detection devices with micro- and nano-scale features for their use in the millimetre, infrared, and visible spectral range. They are optical components th[...]texto impreso
Bueno, Juan ; López Camacho, Elena ; Silva-López, Manuel ; Rico-García, José María ; Llombart, N ; Alda, Javier ; Costa-Krämer, José Luis | Elsevier | 2013-11Silicon microlenses are a very important tool for coupling terahertz (THz) radiation into antennas and detectors in integrated circuits. They can be used in a large array structures at this frequency range reducing considerably the crosstalk bet[...]
