Features of Photoluminescence of Double Acceptors in HgTe/CdHgTe Heterostructures with Quantum Wells in a Terahertz Range

Photoluminescence in Mercury Cadmium Telluride – a Historical Retrospective. Part II: 2004–2022

“…These lines were located in the range 5-12 meV and 16-25 meV, respectively and were attributed to the capture of free holes on the states of mercury vacancy, a double-charged acceptor [66]. PL lines with close energies were also found in MCT-based QW structures [66,67]. The PL spectrum of nominally undoped MCT film with x = 0.22 recorded at T = 20 K had two maxima corresponding to photon energies of ~7.2 meV and ~10.4 meV, respectively [68].…”

“…Most recently, PL spectra in the THz domain were recorded by the same group [66][67][68]. For a nominally undoped MCT film with x = 0.19, two lines were found in the PL spectra, whose position did not change with temperature from 18 to 100 K, while PL intensity changed non-monotonically with temperature increasing.…”

“…The subject of the investigation was now heteroepitaxial films grown on (013)GaAs or (013)Si substrates using the same MBE technology as in Refs. [55][56][57][58][59][60][61][62][63][64][65][66][67][68]. PL was studied in the temperature range 4.2 K < T < 300 K under pulsed excitation with a 1.03 μm semiconductor laser and detection with a cooled InSb photodiode (or Ge photodiode for short wavelengths).…”

The effect of optical phonons on the quenching of photoluminescence of mercury vacancies in narrow-band solid solutions of CdHgTe with increasing temperature

“…For the first time, long-wavelength PL in the far infrared (IR) range associated with acceptor states in bulk MCT epitaxial layers and HgTe/CdHgTe heterostructures with quantum wells was observed in papers [12,13]. Lines were found in the PL spectra near quantum energies of 10 and 20 meV (the latter value is close to the ionization energy A −1 2 -center).…”

Calculation of discrete and resonant states of Coulomb acceptor in HgCdTe alloys

“…Significant progress has been made recently [21,23] in the theoretical study of discrete spectrum of mercury vacancies in MCT. However, describing acceptor resonant states in MCT requires further development of the numerical simulation techniques.…”