Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

Stimulated emission and lasing in Cu(In,Ga)Se2 thin films

Svitsiankou, I E and Pavlovskii, V N and Lutsenko, EV and Yablonskii, G P and Mudryi, A V and Zhivulko, VD and Yakushev, M V and Martin, R W (2016) Stimulated emission and lasing in Cu(In,Ga)Se2 thin films. Journal of Physics D: Applied Physics, 49 (9). ISSN 0022-3727

[img]
Preview
Text (Svitsiankou-etal-AP2016-stimulated-emission-lasing-Cu(In,Ga)Se2-thin-films)
Svitsiankou_etal_AP2016_stimulated_emission_lasing_Cu_In_Ga_Se2_thin_films.pdf - Accepted Author Manuscript

Download (202kB) | Preview

Abstract

Stimulated emission and lasing in Cu(In,Ga)Se 2 thin films have been demonstrated at a temperature of 20 K using excitation by a nanosecond pulsed N 2 laser with power densities in the range from 2 to 100 kW cm − 2 . Sharp narrowing of the photoluminescence band, superlinear dependence of its intensity on excitation laser power, as well as stabilization of the spectral position and of the full-width at half-maximum of the band were observed in the films at increasing excitation intensity. The stimulated emission threshold was determined to be 20 kW cm − 2 . A gain value of 94 cm − 1 has been estimated using the variable stripe length method. Several sharp laser modes near 1.13 eV were observed above the laser threshold of I thr ~ 50 kW cm − 2