Development of Novel Polarizing Spectral Bandpass Filters Using Two-Layer Subwavelength Metallic Gra
- Friday, July 7, 2017 from 10:30am to 12:30pm
- Cobleigh Hall, Room 608 - view map
Major Advisor: Wataru Nakagawa
Faculty and students are invited to attend
Presented in this work is a novel design procedure for a polarization selective infrared spectral bandpass filter using two-layer subwavelength gold gratings. Using theoretical arguments and numerical simulation, it is shown how Fabry-Perot (FP) resonances between the gratings and surface plasmon polariton (SPP) resonances at metal-dielectric interfaces are exploited to achieve the desired bandpass characteristics of TM-polarized light while TE-polarized light is rejected. Early experimental results are presented and compared with simulation. Simulation results of final filter designs for climate science applications show peak transmissions of 80% at three different design wavelengths (1550 nm, 1640 nm, 1700 nm) all with a full-width half-maximum of less than 40 nm.