Abstract
We demonstrate electrically pumped, room temperature, single mode operation of photonic crystal distributed feedback (PCDFB) quantum cascade lasers emitting at λ∼4.75 μm. Ridge waveguides of 100 μm width were fabricated with both PCDFB and Fabry-Ṕrot feedback mechanisms. The Fabry-Ṕrot device has a broad emitting spectrum and a double lobed far-field character. The PCDFB device, as expected, has primarily a single spectral mode and a diffraction limited far field characteristic with a full angular width at half maximum of 2.4°. This accomplishment represents the first step in power scaling of single mode, midinfrared laser diodes operating at room temperature.
Original language | English (US) |
---|---|
Article number | 141123 |
Journal | Applied Physics Letters |
Volume | 91 |
Issue number | 14 |
DOIs | |
State | Published - 2007 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)