On-chip optical filters with designable characteristics based on an interferometer with embedded silicon photonic structures

Abstract

We demonstrate chip-scale flat-top filters at near-infrared wavelengths using negative index photonic crystal based Mach Zehnder interferometers. Supported by full three-dimensional numerical simulations, we experimentally demonstrate a new approach for engineering high-pass, low-pass, band-pass, and band-reject filters, based on designing the photonic band diagram both within the band-gap frequency region and away from it. We further show that our approach can be used to design filters that have tunable multi-level response for different sections of the spectrum and for different polarizations. This configuration enables deterministic control of the bandwidth and the rejection ratio of filters for integrated photonic circuits.

3 pages, 4 figures

References in corpus (3)

• Observations of four-wave mixing in slow-light silicon photonic crystal waveguides
• Observations of zero-order bandgaps in negative-index photonic crystal superlattices at the near-infrared
• Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared