Photonic crystal spectrometer

US8854624B2 · kind B2 · utility

Assignee

• The Trustees of Columbia University in the City of New York · US

Inventors

• Nadia Pervez · Houston, US
• Ioannis Kymissis · New York, US
• Zhang Jia · Santa Clara, US
• Marshall Cox · Brooklyn, US

Key dates

• Filing date: Dec 20, 2011
• Grant date: Oct 7, 2014
• Expiry date: Jun 24, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Apparatus and methods can include an optical waveguide coupled to a photonic crystal comprising a dielectric material, the photonic crystal located on an exterior surface of the optical waveguide and comprising a first surface including a first array of periodic features on or within the dielectric material, the array extending in at least two dimensions and including an effective dielectric permittivity different from the surrounding dielectric material. In an example, the periodic features include a specified lattice constant, the periodic features configured to extract a portion of propagating optical energy from the waveguide through the photonic crystal, the portion determined at least in part by the specified lattice constant.