Photonic crystal devices using negative refraction

US7808716B2 · kind B2 · utility

Assignee

• Northwestern University · US

Inventors

• Wentao Lu · San Francisco, US
• Srinivas Sridhar · Newton, US
• Plarenta Vodo · Malden, US
• Patanjali V. Parimi · Liverpool, US
• Yongjian Huang · Beijing, CN

Key dates

• Filing date: May 16, 2006
• Grant date: Oct 5, 2010
• Expiry date: Sep 10, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/007
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Negative refraction in photonic crystals and diffraction grating is used to design plano-concave lenses to focus plane waves. Microwave experiments are carried out to demonstrate negative refraction and the performance of these lenses. Demonstration of negative refraction of visible light is also performed for the grism. These lenses can be used in optical circuits, astronomical applications, etc.