THRESHOLD POWER OF LASER PUMPING UPON EXCITATION OF INCOHERENT SUPERFLUORESCENCE

Viktor A. Malyshev, Evgenii Dmitrievich Trifonov, L.O. Schwan

HUI WANG, Hongtao Zhang, Zhiping Wang

Under the non-resonant condition, we investigated the optical bistability (OB) in a three-level quantum well system inside a unidirectional ring cavity. We find that the incoherent pumping fields and the quantum interference induced by incoherent pumping fields can affect the optical bistability dramatically, which can be used to manipulate efficiently the threshold intensity and the hysteresis loop. These results are achieved by applying the two incoherent pumping fields, so they are very different from the conventional schemes that coherent driving fields are used to control the optical bistability. Thus, it may provide some new possibilities for technological applications in optoelectronics and solid-state quantum information science.

V. P. Klochkov, E. B. Verkhovskiĭ

Gerald Auböck, Johann Nagl, Carlo Callegari +1 more

Author Institution: Institute of Experimental Physics, TU Graz, Petersgasse 16, 8010 Graz, Austria/EU

V. P. Klochkov

Seyyed Hossein Asadpour, Elnaz Ahmadi Sangachin

The effect of incoherent pumping field on absorption spectrum and population inversion in a four-level quantum dot nanostructure are investigated. It is found that with incoherent pumping field the probe field absorption can be converted to probe field gain. Also, it is found that with combine effect of incoherent pumping field and electron tunneling the lasing can be obtained in the absence or presence of population inversion.