Effect of interface phonons on the functioning of quantum cascade detectors operating in the far infrared range

Seti, Ju. O.; Voіtseкhіvsкa, О. М.; Vereshko, E.; Tkach, N. V.

doi:10.1007/s13204-021-01708-8

Cited by 7 publications

(1 citation statement)

References 32 publications

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“…In the case of multiple heterostructures, optical phonons can be strongly influenced by the presence of heterointerfaces, and their interaction with two-dimensional confined electrons will be significantly modified compared with the three-dimensional case. [17][18][19] The quantum-mechanical polarization selection rule states that only the electric field component perpendicular to the quantum well layers interacts with intersubband transitions, thus there are limited ways to characterize band structures of QCD devices without modifying the device geometries. Current reported methods include transmission spectroscopy, [6,20,21] photocurrent (PC) spectroscopy, [15,22] and electroreflectance (ER).…”

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confidence: 99%

Influence of Fröhlich Interaction on Intersubband Transitions of InGaAs/InAlAs-Based Quantum Cascade Detector Structures Investigated by Infrared Modulated Photoluminescence

Zhu

Liu

Shao

et al. 2023

Chinese Phys. Lett.

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We demonstrate the use of an infrared modulated photoluminescence (PL) method based on step-scan Fourier-transform infrared spectrometer to analyze intersubband transition (ISBT) of InGaAs/InAlAs quantum cascade detector (QCD) structures. By configuring oblique and parallel excitation geometries, high signal-to-noise ratio PL spectra from nearto far-infrared are measured. With support from numerical calculations based on k·p perturbation theory, the spectra is attributed to intraband and interband transitions of InGaAs/InAlAs QCD structures. Temperature evolution results show the k-dependent transitions caused by longitudinal optical phonon-assisted scattering (Fröhlich interaction) plays an important role in the ISBT. These results suggest this infrared modulated-PL method has great potential in characterizing QCD devices and conducting performance diagnostics.

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