Patent ID: 11888075
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 9:
10. An image sensor comprising:
a metal surface;
a metal nanohole array formed on the metal surface; and
a detector array formed at a position corresponding to the metal nanohole array,
wherein the metal surface is configured to shield incident light and generate surface plasmon polaritons (SPPs),
wherein the detector array comprises:
a light absorbing layer using the generated SPPs and allowing charges excited by the SPPs and a localized electric field effect to tunnel; and
a dielectric formed at nanoholes in which at least a part of the metal layer is opened, and
wherein the SPPs form localized surface plasmons (LSPs) at an interface where the metal layer meets the dielectric,
wherein a density of a localized electric field increases per unit area to increase photocurrent as a size of the nanoholes decreases, and
wherein the metal surface is extended from a surface to the light absorbing layer and guides the generated SPPs to be transmitted to the light absorbing layer.