Часи життя носіїв заряду у вузькощілинному Hg1–xCdxTe при міжзонному та внутрішньозонному збудженні

• Datum: 2023
• Hauptverfasser: Staryi, S., Lysjuk, I., Golenkov, O., Tsybrii, Z., Danilov, S., Gumenjuk-Sichevska, J., Andrieieva, K., Smolii, M., Sizov, F.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Publishing house "Academperiodika" 2023
• Schlagworte: HgCdTe; часи життя; внутрiшньозонне i мiжзонне збудження; випромiнення у дiапазонi ТГц
• Online Zugang: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023114
• Назва журналу: Ukrainian Journal of Physics

The lifetimes of photoconductive decay carriers under interband and intraband excitations are studied in epitaxial layers of narrow-gap Hg1−xCdxTe (x ∼0.2). Samples with large distances (>3 mm) between small-area electrical contacts and small distances (∼10 μm) with largearea contacts (THz antennas) are studied. The lifetimes of decay carriers for intraband and interband excitations are measured and compared. It has been established that, in samples with n-type conductivity, the lifetimes are comparable (in the interval of 40 ns) for both methods of excitation. At the same time, in samples with a small distance between contacts and a large area (bow-tie antennas), contacts make the main contribution to recombination. The elimination of recombination at the contacts leads to a lifetime of ∼10−6 s.