Experimental Demonstration of Nanolaser with sub-$\mu$A Threshold Current

TL;DR

This paper reports a nanolaser with an ultra-low threshold current of 730 nA, capable of high-speed modulation at 3 GHz, enabling energy-efficient on-chip optical communication.

Contribution

It presents the first demonstration of a nanolaser with a sub-microampere threshold current at room temperature, significantly advancing low-energy photonic devices.

Findings

Threshold current of 730 nA at telecom wavelengths

Modulation speed of 3 GHz with 1 fJ/bit energy

Lowest threshold reported for room-temperature lasers

Abstract

We demonstrate a photonic crystal nanolaser exhibiting an ultra-low threshold of 730 nA at telecom wavelengths. The laser can be directly modulated at 3 GHz at an energy cost of 1 fJ/bit. This is the lowest threshold reported for any laser operating at room temperature and facilitates low-energy on-chip links.