Ja. Wang et al., SIZE EFFECT UPON EMISSION DYNAMICS OF 1.5 MU-M QUASI-QUANTUM WIRE DISTRIBUTED-FEEDBACK SEMICONDUCTOR-LASERS, Applied physics letters, 69(3), 1996, pp. 287-289
Emission dynamics of 1.5 mu m InGaAs/InGaAsP quasi-quantum wire lasers
excited by ultrashort optical pulses were investigated. Wire distribu
ted feedback lasers with different nanometer wire widths and distances
between the wires, which were realized by dry-etching technique, were
compared in detail. The dependence of dynamic behavior on wire width
was observed. Detailed theoretical simulations show that, the improvem
ent of dynamic response with decrease of wire width is attributed to a
superlinear increase of differential gain with decrease of wire width
, which counteracts the negative effects due to decrease of packing de
nsity of the active region and increase of electron relaxation time. (
C) 1996 American Institute of Physics.