Journal Article

InGaAs/AlInAs/InP Quantum-Cascade Lasers with Reflective and Antireflective Optical Coatings

Mikhailov, D. A., Abdulrazak, S. Kh, Gladyshev, A. G., Slipchenko, S. O., Pikhtin, N. A., Podgaetskii, K. A., Novikov, I. I., Karachinsky, L. Ya, Lyutetskii, A. V., Sokolovskii, G. S., Kuznetsov, E. V., Babichev, A. V., Ivanov, A. V., Lobintsov, A. V., Dyudelev, V. V., Chistyakov, D. V., Danilov, A. I., Losev, S. N., Marmalyuk, A. A., Egorov, A. Yu, Kognovitskaya, E. A., Ladugin, M. A., Savchenko, G. M.

2024

Overview

Quantum-cascade lasers (QCLs) based on InGaAs/AlInAs/InP with reflective and antireflective coatings are fabricated and studied. The manufactured lasers emit in the spectral range from 4 to 5 μm. The effect of variation in the front mirror reflectance on the output power of a QCL with a highly reflective rear mirror is investigated. It is shown that the use of an antireflective coating on the front face leads to a simultaneous increase in both the threshold current of the QCL and the slope of the light–current characteristic. This allows a higher output power to be achieved at high pump currents. In contrast, the use of a partially reflective coating on the front face not only reduces the threshold current of the QCL, but also decreases the slope of the light–current characteristic. Such QCLs may have an advantage over other emitters at low pump currents.

• Publisher: Pleiades Publishing,Springer Nature B.V
• Subject: Antireflection coatings / Efficiency / Emitters / Energy consumption / Indium aluminum arsenides / Indium gallium arsenides / Indium phosphides / Lasers / Molecular beam epitaxy / Optical coatings / Physics / Physics and Astronomy / Protective coatings / Quantum cascade lasers / Radiation / Spectral emittance / Threshold currents