Dresden 2020 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 51: Semiconductor lasers I

HL 51.6: Talk

Wednesday, March 18, 2020, 16:45–17:00, POT 51

Optical and quantum optical characterization of silver-coated InP-based nanolasers on silicon — •Aris Koulas-Simos¹, Kaisa Laiho¹, Jianxing Zhang², Cun-Zheng Ning², and Stephan Reitzenstein¹ — ¹Institute of Solid State Physics, Technische Universität Berlin, Berlin Germany — ²Tsinghua University, Department of Electronic Engineering, Beijing, China

A nanolaser is an optical laser device with a design close to the size limit of the cubic light wavelength. In comparison to conventional lasers, nanolasers possess very low-threshold powers for few-photon operation and may exhibit even a ``thresholdless" input-output behavior thanks to the high β-factors close to unity, where the β-factor describes the coupling efficiency of the spontaneous emission to the lasing mode. Here, we investigate at first the conventional optical properties such as the LL-curve and the linewidth narrowing of silver-coated bulk InP nanolasers emitting at telecom wavelengths. More importantly, to confirm lasing of a device, the knowledge of the photon statistics is required. We verify that by observing the transition from thermal to coherent emission in excitation-dependent second order correlation measurements.