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The schematics for (a) the PCDFB QCL and (b) the coupling mechanism in the reciprocal rectangular lattice.
(a) Photonic dispersion diagram for the PC lattice structure; [(b) and (c)] detailed band structure and group velocities of index guide dispersions around the anticrossing; [(d)–(g)] mode profiles for the four gray dots in (b).
The scanning electron microscopy pictures for (a) the PC lattice transferred to the InGaAs layer and (b) cross section of the lattice after regrowth.
The measured far field distributions for the FP and PCDFB QCLs, and the simulated results for PCDFB devices. Inset: measured results from a PCDFB QCL.
(a) The emission spectra and (b) the light-current-voltage characteristics of PCDFB QCLs measured at different temperatures.
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