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Solid immersion lens at the aplanatic condition for enhancing the spectral bandwidth of a waveguide grating coupler

Pereira, Marcelo B. and Craven, Jill S. and Mendes, Sergio B. (2010) Solid immersion lens at the aplanatic condition for enhancing the spectral bandwidth of a waveguide grating coupler. Optical Engineering, 49 (12). Art. No. 124601. ISSN 0091-3286 . PMCID PMC3092502. http://resolver.caltech.edu/CaltechAUTHORS:20110303-095334065

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/1.3520063DOIArticle
http://spiedigitallibrary.org/oe/resource/1/opegar/v49/i12/p124601_s1PublisherArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3092502/PubMed CentralArticle
Additional Information:© 2010 Society of Photo-Optical Instrumentation Engineers. Paper 100554R received Jul. 8, 2010; revised manuscript received Oct. 13, 2010; accepted for publication Oct. 15, 2010; published online Dec. 7, 2010. This project was funded by the NIH (award RR022864 to S.B.M.) and the NSF (award DBI-0352449 to S.B.M.).
Funders:
Funding AgencyGrant Number
NIHRR022864
NSFDBI-0352449
Subject Keywords:micro-optics; beam-shaping optics; grating coupler; biophotonics; optical spectroscopy; molecular films
Classification Code:PACS: 42.82.Et; 42.79.Gn; 42.79.Bh; 42.79.Dj; 87.64.km; 87.64.Cc
PubMed Central ID:PMC3092502
Record Number:CaltechAUTHORS:20110303-095334065
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110303-095334065
Official Citation:Marcelo B. Pereira, Jill S. Craven and Sergio B. Mendes, "Solid immersion lens at the aplanatic condition for enhancing the spectral bandwidth of a waveguide grating coupler", Opt. Eng. 49, 124601 (Dec 07, 2010); doi:10.1117/1.3520063
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22620
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Mar 2011 22:18
Last Modified:05 Oct 2016 21:46

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