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Small-signal modulation characteristics of a polariton laser.

ABSTRACT: Use of large bandgap materials together with electrical injection makes the polariton laser an attractive low-power coherent light source for medical and biomedical applications or short distance plastic fiber communication at short wavelengths (violet and ultra-violet), where a conventional laser is difficult to realize. The dynamic properties of a polariton laser have not been investigated experimentally. We have measured, for the first time, the small signal modulation characteristics of a GaN-based electrically pumped polariton laser operating at room temperature. A maximum -3?dB modulation bandwidth of 1.18?GHz is measured. The experimental results have been analyzed with a theoretical model based on the Boltzmann kinetic equations and the agreement is very good. We have also investigated frequency chirping during such modulation. Gain compression phenomenon in a polariton laser is interpreted and a value is obtained for the gain compression factor.

SUBMITTER: Baten MZ

PROVIDER: S-EPMC4495564 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature

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Small-signal modulation characteristics of a polariton laser.

Baten Md Zunaid MZ Frost Thomas T Iorsh Ivan I Deshpande Saniya S Kavokin Alexey A Bhattacharya Pallab P

Scientific reports 20150708

Use of large bandgap materials together with electrical injection makes the polariton laser an attractive low-power coherent light source for medical and biomedical applications or short distance plastic fiber communication at short wavelengths (violet and ultra-violet), where a conventional laser is difficult to realize. The dynamic properties of a polariton laser have not been investigated experimentally. We have measured, for the first time, the small signal modulation characteristics of a Ga ...[more]

PMID: 26154681

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