Immersion meta-lens at visible wavelengths for diffraction-limited imaging

US11320641B2 · kind B2 · utility

Assignee

• President and Fellows of Harvard College · US

Inventors

• Wei-Ting Chen · Tainan, TW
• Alexander Yutong Zhu · Santa Clara, US
• Mohammadreza Khorasaninejad · Cambridge, US
• Zhujun Shi · Redmond, US
• Federico Capasso · Westfield, US
• Vyshakh Sanjeev · Whitby, CA

Key dates

• Filing date: Mar 29, 2018
• Grant date: May 3, 2022
• Expiry date: Dec 7, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/002
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The optical imaging apparatus includes a metasurface lens including a substrate and a plurality of nano-structures patterned on a first side of the substrate. The optical imaging apparatus further includes imaging optics disposed in a spaced apart relationship with a second side of the substrate. The second side is opposite the first side on which the nano-structures are patterned. A surface of the imaging optics and the second side of the substrate define a space for accommodating an immersion fluid. The metasurface lens is configured to direct light incident on the plurality of nano-structures towards the imaging optics through the space accommodating the immersion fluid.