Photoluminescence, stimulated and laser emission in CuInSe2 crystals

Svitsiankou, I. E. and Pavlovskii, V. N. and Lutsenko, E. V. and Yablonskii, G. P. and Mudryi, A. V. and Borodavchenko, O. M. and Zhivulko, V. D. and Martin, R. W. and Yakushev, M. V. (2021) Photoluminescence, stimulated and laser emission in CuInSe2 crystals. Applied Physics Letters, 119 (21). 212103. ISSN 0003-6951

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    Abstract

    Excitonic quality CuInSe2 crystals were studied using low-temperature (10 K) photoluminescence (PL) excited by continuous wave and nanosecond pulsed lasers at power densities from 0.01 kW/cm2 to 76 kW/cm2 . Increasing the excitation power density level to 26 kW/cm2 resulted in the appearance of a stimulated emission SE-band in the PL spectra at 1.035 eV. Further increase in the excitation level to 39 kW/cm2 generated on the top of the SE band a structure of equidistant sharp lines attributed to laser emission. at 1.035 eV. Further increase in the excitation level to 39 kW/cm2 generated a structure of equidistant sharp lines attributed to laser emission on the top of the SE band. The lasing regime suggests the presence of volumes with parallel faces (microcracks or grain boundaries), which act as laser mirrors within the CuInSe2 crystals.

    ORCID iDs

    Svitsiankou, I. E., Pavlovskii, V. N., Lutsenko, E. V., Yablonskii, G. P., Mudryi, A. V., Borodavchenko, O. M., Zhivulko, V. D., Martin, R. W. ORCID logoORCID: https://orcid.org/0000-0002-6119-764X and Yakushev, M. V.;