Abstract
We study the use of polymer gratings as light couplers into porous silicon planar waveguides for sensing applications. Experimental evidence of a guided mode in a grating-coupled porous silicon structure is presented, along with a study of its detuning due to waveguide infiltration with a chemical linker. All the measurements are in good agreement with simulations obtained by means of a Fourier modal method, where the porous silicon birefringence is considered. These results demonstrate that this system is potentially useful for chemical and biological sensing applications.
| Original language | English |
|---|---|
| Article number | 123113 |
| Journal | Journal of Applied Physics |
| Volume | 104 |
| Issue number | 12 |
| DOIs | |
| State | Published - 2008 |
Funding
This work was supported in part by the National Science Foundation (Grant No. ECCS0746296) and the Army Research Office (Grant No. W911NF-08-1-0200). A portion of this research was conducted at Oak Ridge National Laboratory's Center for Nanophase Materials Sciences, which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. Resources at the Vanderbilt Institute of Nanoscale Science and Engineering were also utilized for a portion of this research. One of the authors (C.K.) acknowledges support from a NSF Integrated Graduate Education and Research Training program. Two of the authors (M.L. and J.E.S.) acknowledge support from the Natural Science and Engineering Research Council of Canada (NSERC) and the Ontario Centre of Excellence.
| Funders | Funder number |
|---|---|
| Scientific User Facilities Division | |
| National Science Foundation | ECCS0746296, 0746296 |
| U.S. Department of Energy | |
| Army Research Office | W911NF-08-1-0200 |
| Basic Energy Sciences | |
| Ontario Centres of Excellence | |
| Natural Sciences and Engineering Research Council of Canada |