Artículos de revistas
Theoretical and numerical study of diffraction on electromagnetic optics vi. Obliquely incident t.e.-polarized gaussian beams on a finite grating with conducting substrate
Autor
CHÁVEZ RIVAS, F.
MATA MÉNDEZ, O.
SUMAYA MARTÍNEZ, J.
Institución
Resumen
SE PRESENTA UNA TEORÍA RIGUROSA MODAL PARA LA DIFRACCIÓN DE UN HAZ GAUSIANO CON POLARIZACIÓN T.E. INCIDIENDO OBLICUAMENTE SOBRE UNA RED DE DIFRACCIÓN FINITA HECHA DE N RENDIJAS. LA PANTALLA DONDE ESTAN EXCAVADAS LAS RENDIJAS ES PLANA E INFINITAMENTE CONDUCTORA, MIENTRAS QUE EL SUSTRATO PUEDE SER UN DIELÉCTRICO O UN METAL CON ÍNDICE DE REFRACCIÓN COMPLEJO . ESTUDIAMOS EL PATRÓN DE RADIACIÓN EN CAMPO LEJANO, EL COEFICIENTE DE TRANSMISIÓN Y LA ENERGÍA NORMALMENTE DIFRACTADA. PARTICULARMENTE SE ANALIZA EL ACOPLAMIENTO ENTRE RENDIJAS Y LA INFLUENCIA DEL SUSTRATO.AbstractDIFFRACTION OF AN OBLIQUELY INCIDENT TE-POLARIZED GAUSSIAN BEAMS BY N EQUALLY SPACED SLITS (FINITE GRATING) WITH CONDUCTING SUBSTRATE IS TREATED. THE SUBSTRATE CAN BE EITHER VACUUM OR CONDUCTOR. THE DIFFRACTED AND SCATTERED PATTERNS, THE TRANSMISSION AND REFLECTION COEFFICIENTS, AND THE NORMALLY DIFFRACTED ENERGY ARE ANALYZED AS A FUNCTION OF SEVERAL OPTOGEOMETRICAL PARAMETERS. PARTICULARLY, THE COUPLING BETWEEN SLITS AND THE INFLUENCE OF THE SUBSTRATE IS CONSIDERED. WE HAVE FOUND THAT, WHEN THE SUBSTRATE IS A CONDUCTOR, THE GRATING EQUATION IN REFLECTION PREDICTS WITH GOOD PRECISION THE ANGULAR POSITIONS OF THE ORDERS OF A FINITE GRATING; THE ANGULAR POSITIONS OF THESE ORDERS ARE INDEPENDENTS OF THE BEAM WIDTH, THE SPOT POSITION ON THE FINITE DIFFRACTION OF AN OBLIQUELY INCIDENT TE-POLARIZED GAUSSIAN BEAMS BY N EQUALLY SPACED SLITS (FINITE GRATING) WITH CONDUCTING SUBSTRATE IS TREATED. THE SUBSTRATE CAN BE EITHER VACUUM OR CONDUCTOR. THE DIFFRACTED AND SCATTERED PATTERNS, THE TRANSMISSION AND REFLECTION COEFFICIENTS, AND THE NORMALLY DIFFRACTED ENERGY ARE ANALYZED AS A FUNCTION OF SEVERAL OPTOGEOMETRICAL PARAMETERS. PARTICULARLY, THE COUPLING BETWEEN SLITS AND THE INFLUENCE OF THE SUBSTRATE IS CONSIDERED. WE HAVE FOUND THAT, WHEN THE SUBSTRATE IS A CONDUCTOR, THE GRATING EQUATION IN REFLECTION PREDICTS WITH GOOD PRECISION THE ANGULAR POSITIONS OF THE ORDERS OF A FINITE GRATING; THE ANGULAR POSITIONS OF THESE ORDERS ARE INDEPENDENTS OF THE BEAM WIDTH, THE SPOT POSITION ON THE FINITE