Solid immersion lens at the aplanatic condition for enhancing the spectral bandwidth of a waveguide grating coupler
dc.contributor.author | Pereira, Marcelo Barbalho | pt_BR |
dc.contributor.author | Craven, Jill S. | pt_BR |
dc.contributor.author | Mendes, Sergio Brito | pt_BR |
dc.date.accessioned | 2014-03-26T01:50:57Z | pt_BR |
dc.date.issued | 2012 | pt_BR |
dc.identifier.issn | 0091-3286 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/89686 | pt_BR |
dc.description.abstract | We report a technique to substantially boost the spectral bandwidth of a conventional waveguide grating coupler by using a solid immersion cylindrical lens at the aplanatic condition to create a highly anamorphic beam and reach a much larger numerical aperture, thus enhancing the spectral bandwidth of a free-space propagating optical beam coupled into a single-mode planar integrated optical waveguide (IOW). Our experimental results show that the broadband IOW spectrometer thus created almost doubles (94% enhancement) the coupled spectral bandwidth of a conventional configuration. To exemplify the benefits made possible by the developed approach, we applied the technique to the broadband spectroscopic characterization of a protein submonolayer; our experimental data confirm the enhanced spectral bandwidth (around 380–nm) and illustrate the potentials of the developed technology. Besides the enhanced bandwidth, the broadband coupler of the single-mode IOW spectrometer described here is more robust and user-friendly than those previously reported in the literature and is expected to have an important impact on spectroscopic studies of surface-adsorbed molecular layers and surface phenomena. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Optical engineering. Redondo Beach. Vol. 49, no. 12 (Dec. 2010), 124601, 8 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Micro-optics | en |
dc.subject | Técnicas biológicas | pt_BR |
dc.subject | Beam-shaping optics | en |
dc.subject | Espectrometros | pt_BR |
dc.subject | Grating coupler | en |
dc.subject | Espectroscopia infravermelha | pt_BR |
dc.subject | Biophotonics | en |
dc.subject | Lentes | pt_BR |
dc.subject | Optical spectroscopy | en |
dc.subject | Acopladores ópticos | pt_BR |
dc.subject | Molecular films | en |
dc.subject | Óptica integrada | pt_BR |
dc.title | Solid immersion lens at the aplanatic condition for enhancing the spectral bandwidth of a waveguide grating coupler | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000866341 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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