Photodetector structures formed on high-index substrates

US11251320B2 · kind B2 · utility

Assignee

• IQE plc · GB

Inventors

• Dmitri Lubyshev · Bethlehem, US
• Joel M. Fastenau · Bethlehem, US
• Amy Wing Kwan Liu · Mountain View, US
• Michael Vincent Kattner · Lehighton, US
• Philip Lee Frey · Bethlehem, US
• Scott Alan Nelson · River Falls, US
• Mark Justin Furlong · Woodstock, GB

Key dates

• Filing date: Apr 9, 2020
• Grant date: Feb 15, 2022
• Expiry date: Jun 19, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F77/16

Abstract

A layered structure used for detecting incident light includes a substrate having a surface with a high Miller index crystal orientation and a superlattice structure formed over the substrate at the surface. The superlattice structure is aligned to the high Miller index crystal orientation and exhibits a red-shifted long wave infrared response range based on the crystal orientation as compared to a superlattice structure formed over a substrate at a surface with a (100) crystal orientation.