RESUMEN
A solid immersion lens can be applied for high-resolution subsurface analysis of integrated circuits and other physical systems. We present a thorough analysis of the focal field distribution of a solid immersion lens system of arbitrary thickness. Cases of linearly and radially polarized illumination are examined and accurate expressions derived for the electric field in the image space. The effect of the spherical interface on both transverse and axial intensity profiles is analyzed. The performance and practicality of configurations deviating from the hemispherical and aplanatic cases are studied. The results show that optimal resolution is obtained at focal positions between the hemispherical and aplanatic points when radially polarized illumination is applied.
Asunto(s)
Lentes , Fenómenos Ópticos , Modelos Teóricos , Programas InformáticosAsunto(s)
Técnicas Biosensibles/instrumentación , ADN/genética , Electroquímica/instrumentación , Microelectrodos , Nanoestructuras/química , Nanotecnología/instrumentación , Polímeros/química , Cristalización/métodos , ADN/análisis , ADN/química , Diseño de Equipo , Análisis de Falla de Equipo , Ensayo de Materiales , Nanoestructuras/ultraestructura , Tamaño de la PartículaRESUMEN
We report a novel approach to the fabrication of self-aligned nanoscale trench structures in a thin polymer layer covering on conductive materials. By passing AC current through a polymer-coated nanowire in the presence of an appropriate solvent, a self-aligned nanotrench is formed in the polymer overlayer as a result of accelerated dissolution while the rest of the device remains covered. Similar results have been achieved for polymer-coated graphene ribbons. Such polymer-protected devices in which only the active component is exposed should find important applications as electrical sensors in aqueous solutions, particularly in cases where parasitic ionic currents often obscure sensing signals.