Output polarization characteristics of a GaN microcavity diode polariton laser

• Main Authors: Bhattacharya, Aniruddha, Baten, Md Zunaid, Iorsh, Ivan, Frost, Thomas, Kavokin, Alexey, Bhattacharya, Pallab
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Optoelectronics; Polaritons
• Online Access: https://hdl.handle.net/10356/83873; http://hdl.handle.net/10220/42871
• Institution: Nanyang Technological University

We report the steady state output polarization characteristics of GaN-based microcavity polariton lasers operated with electrical injection at room temperature. The output is unpolarized below the nonlinear threshold injection current and is linearly polarized above it with a maximum degree of polarization of ∼ 22 % . The results have been analyzed theoretically, and the calculated results are in agreement with the measured data. We have also measured the polarization-resolved output light current characteristics, wherein a distinct lowering of the non-linear threshold is observed in one device. This is interpreted in terms of spatially inhomogeneous lifting of degeneracy and polarization splitting in the microcavity.