Light emission using quantum dot emitters in a photonic crystal

US7346251B2 · kind B2 · utility

Assignee

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

Inventors

• Ranojoy Bose · Palo Alto, US
• Chee Wei Wong · New York, US
• Xiaodong Yang · New York, US

Key dates

• Filing date: Apr 18, 2006
• Grant date: Mar 18, 2008
• Expiry date: Apr 18, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B82Y20/00
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

Devices and methods of manufacturing; for emitting substantially white light using a photonic crystal are described. The photonic crystal has a lattice of air holes and is made from a substrate containing quantum dots. The substrate is etched with three defects that are optically coupled together so that each emits only certain frequencies of light. In combination, the defects can produce substantially white light. The parameters of the photonic crystal are dimensioned so as to cause the coupling between the defects to produce substantially white light.