Electrical excitation of color centers in phosphorus-doped diamond Schottky diodes

TL;DR

This paper demonstrates electrically driven emission from color centers in hydrogen-passivated n-type diamond Schottky diodes, offering a simpler alternative to complex p-i-n structures for quantum light sources at room temperature.

Contribution

It introduces a novel Schottky diode configuration for electrical excitation of color centers in diamond, simplifying device fabrication for quantum applications.

Findings

Electrical emission of color centers achieved in hydrogen-passivated n-type diamond Schottky diodes.

Potential for integrated single-photon sources operating at ambient conditions.

Simplifies the structure needed for electrically driven quantum light emitters.

Abstract

A robust quantum light source operating upon electrical injection at ambient conditions is desirable for practical implementation of quantum technologies, such as quantum key distribution or metrology. Color centers in diamond are promising candidates as they are photostable emitters at room and elevated temperatures. The possibility of their electrical excitation has already been demonstrated within p-i-n diodes. However, this requires the growth of complex diamond structures. In contrast to these conventional approaches, we demonstrate the emission of color centers under electrical pumping in a novel Schottky diode configuration based on hydrogen passivated n-type diamond, which holds promise for integrated single-photon emitting devices based on color centers in diamond.