Title :
Negative refraction in a Si-polymer photonic Crystal membrane
Author :
Schonbrun, Ethan ; Tinker, Mark ; Park, Wounjhang ; Lee, Jeong-Bong
Author_Institution :
Electr. Eng. Dept., Univ. of Colorado, Boulder, CO, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
We have observed negative refraction in a photonic crystal (PC) membrane structure at near-infrared wavelengths. The device is fabricated on a silicon-on-insulator substrate and consists of a silicon rod matrix suspended in a polymer where optical energy is delivered by ridge waveguides with various incident angles. The propagation direction inside the PC shows extraordinary refraction with an angle consistent with our two-dimensional numerical simulations. To our knowledge, this is the first experimental observation of isotropic negative refraction in a Si-based planar PC structure at optical frequencies. The realization of negative refraction in a planar Si-based system enables applications in negative index imaging to be integrated into compact optical circuits.
Keywords :
infrared spectra; membranes; optical polymers; optical waveguides; photonic crystals; refractive index; ridge waveguides; silicon; Si; Si-based system; Si-polymer membrane; compact optical circuits; device fabrication; near-infrared wavelengths; negative index imaging; negative refraction; optical energy; optical frequencies; photonic crystal membrane; planar photonic crystal structure; propagation direction; ridge waveguides; silicon rod matrix; silicon-on-insulator substrate; suspension; two-dimensional numerical simulations; Biomembranes; Numerical simulation; Optical devices; Optical polymers; Optical propagation; Optical refraction; Optical waveguides; Photonic crystals; Silicon on insulator technology; Transmission line matrix methods; Integrated optics; negative refraction; photonic crystal (PC);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.846477
