A room-temperature continuous-wave operating midinfrared light emitting device.
- Resource Type
- Article
- Authors
- Weik, Fritz; Steinmeyer, Günter; Tomm, Jens W.; Glatthaar, Regine; Vetter, Uwe; Nurnus, Joachim; Lambrecht, Armin
- Source
- Journal of Applied Physics. 6/1/2006, Vol. 99 Issue 11, p114506. 4p. 1 Black and White Photograph, 1 Diagram, 3 Graphs.
- Subject
- *LIGHT emitting diodes
*INFRARED radiation
*SEMICONDUCTORS
*OPTICAL pumping
*LASERS
- Language
- ISSN
- 0021-8979
An optimized light source for the 4–5 μm wavelength region with a continuous-wave output power of 2 mW at ambient temperature is introduced. The device is based on a narrow-gap lead salt semiconductor chip, which is optically pumped by a standard high-power diode laser array. Surface patterning is employed and leads to an up to sixfold increase in out-coupling efficiency compared to untreated chip surfaces. A model is presented that explains this enhancement of the light extraction. Output efficiencies of 4×10-4 are achieved. [ABSTRACT FROM AUTHOR]