Room-temperature mid-infrared interband cascade vertical-cavity surface-emitting lasers
Abstract
We report interband cascade vertical-cavity surface-emitting lasers (ICVCSELs) that operate in pulsed mode at temperatures up to 70 °C. Their emission at λ ≈ 3.4 μm extends considerably the previous longest wavelength of 3.0 μm for an electrically-pumped vertical-cavity surface-emitting laser operating at room temperature. The output from mesas having diameters ranging from 30 to 60 μm (with emission aperture diameters of 20–50 μm) is circularly symmetric, and the threshold current densities at T = 25 °C are as low as 390 A/cm2. However, the differential slope efficiencies are low, e.g., ≤50 mW/A at T = 25 °C, due to loss in the top and bottom mirrors and reduced current efficiency. The smallest device operates in a single spectral mode despite having an emission aperture much wider than the wavelength.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 10, 2016
- Source ID
- 10.1063/1.4964840
Entities
People
- C. D. Merritt
- C. L. Canedy
- Chul Soo Kim
- I. Vurgaftman
- J. R. Meyer
- M. V. Warren
- Min Suk Kim
- W. W. Bewley
Organizations
- Office of Naval Research
- United States Naval Research Laboratory