Single mode interband cascade lasers based on lateral metal gratings

Robert Weih, Lars Naehle, Sven Hoefling*, Johannes Koeth, Martin Kamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Single mode distributed feedback (DFB) interband cascade lasers were realized by placing metal gratings laterally to dry etched ridges. A discrete tuning range of 104 nm could be realized on the same gain material by a variation of the grating period. At room temperature, a 2.4 mm long and 9.8 μm wide ridge with as-cleaved facets emitted more than 6 mW of single mode output power in continuous-wave (cw) mode at a wavelength around 3.8 μm. With typical temperature- and current-tuning rates of 0.31 nm/ °C and 0.065 nm/mA, respectively, a total tuning bandwidth of more than 10 nm could be covered with a single device.

Original languageEnglish
Article number071111
Number of pages3
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 18 Aug 2014


  • MU-M
  • Room-temperature
  • Wavelength range
  • Diodes


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