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(Color online) (a) Band structure of the W-shaped type-II laser. Injection directions of electrons and holes are indicated. (b) Magnification of one period of the active region.
(Color online) Lasing spectra and electroluminescence spectrum of a 2.31 μm device below threshold. The laser lengths are 1 mm for both cases, the width are 10 μm and 26 μm for the case of the 2.31 μm and 2.55 μm lasers, respectively.
(Color online) Pulsed threshold current density versus inverse cavity length at 15 °C, for a pulse length of 500 ns and a repetition rate of 250 Hz.
(Color online) Pulsed threshold current density as a function of temperature for 2.31 μm lasers (black line) and 2.55 μm lasers (red line).
(Color online) P-J and V-J characteristics of a 1 mm long and 10 μm wide λ = 2.31 μm device. Lasing-operation can be observed up to 0 °C.
Well thicknesses, compositions, and lasing wavelengths of two different type-II laser designs.
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