Infrared detector based on conduction band intersubband transitions in a heterojunction between two quantum wires

TL;DR

This paper explores a novel infrared detector design using conduction band intersubband transitions in a heterojunction of two quantum wires, enabling tunable and broadband detection through structural engineering.

Contribution

It introduces a new concept for infrared detection based on quantum wire heterojunctions, demonstrating tunability and broadband capabilities by varying wire radii.

Findings

Feasibility of using quantum wire heterojunctions for IR detection

Band structure engineering enables photocurrent creation

Arrays with different wire radii allow broadband detection

Abstract

In this paper we study the feasibility of an infrared detector based on intersubband transitions in the conduction band of the junction between two semiconductor quantum wires. We show that by varying the radius of the wires it is possible to engineer a band structure of the junction that would be favorable for creating and detecting photocurrent. The suggested concept also allows for broadband detection based on arrays of wires with different radii.