Ultralow threshold currents (<0.1 mA) in InGaAs quantum well lasers by low-temperature operation

Fabrication of low threshold current semiconductor lasers are of great importance for optical interconnects and other applications. Specially, integration of ultralow semiconductor lasers and superconducting electronic devices and operating them at low temperature will be necessary in high performance systems. These are also attractive for applications in space where the low temperatures are easy to achieve.