Open AccessOptical spectroscopy studies of atom intermixing in the core versus growth temperature of the claddings in MOCVD-grown quantum cascade lasers
Author(s) -
Marcin Kurka,
Mikołaj Badura,
Mateusz Dyksik,
K. Ryczko,
Jan Kopaczek,
J. Misiewicz,
B. Ściana,
M. Tłaczała,
Iwona Sankowska,
Kamil Pierściński,
M. Motyka
Publication year - 2019
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 17
ISSN - 2399-6528
DOI - 10.1088/2399-6528/ab5e56
Subject(s) - metalorganic vapour phase epitaxy , spectroscopy , photoluminescence , cascade , cladding (metalworking) , laser , materials science , quantum well , optoelectronics , quantum cascade laser , molecular physics , optics , chemistry , epitaxy , physics , nanotechnology , layer (electronics) , quantum mechanics , chromatography , metallurgy
Here we present optical spectroscopy studies to examine structural and optical properties of active region of quantum cascade lasers grown fully by MOCVD technique. The active part is InGaAs/AlInAs based multilayer structure nominally lattice matched to InP substrate. In this communication we study a set of structures with different growth temperature of the cladding layers and its influence on the properties of active core. The x-ray spectroscopy (XRD) allowed to determine the widths of constituent layers and compare obtained values with nominal ones. Fourier-transformed photoluminescence (FTPL) and photoreflectance (PR) measurements provided high signal to noise spectra, proving good optical and structural properties of investigated samples. A model of atoms interdiffusion processes was presented to explain observed small energy shifts of the transitions energies within the investigated multilayer structures.