Measurement of photoluminescence spectral linewidth of a GaAs quantum well in perpendicular electric fields: Evidence of a crossover from trions to an electron-hole gas | Zendy

M. Yamaguchi | Zendy; Shintaro Nomura | Zendy; Hiroyuki Tamura | Zendy; Tatsushi Akazaki | Zendy

Open Access

Measurement of photoluminescence spectral linewidth of a GaAs quantum well in perpendicular electric fields: Evidence of a crossover from trions to an electron-hole gas

Author(s) -

M. Yamaguchi,

Shintaro Nomura,

Hiroyuki Tamura,

Tatsushi Akazaki

Publication year - 2013

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.87.081310

Subject(s) - trion , laser linewidth , physics , electron , exciton , condensed matter physics , quantum well , photoluminescence , electron density , electric field , radius , fermi gas , coulomb , atomic physics , optics , quantum mechanics , laser , computer science , computer security

By measuring the photoluminescence linewidth of a GaAs quantum well under perpendicular electric fields, we have traced the variation of the effective radius a* of a charged exciton (trion) as a function of electron density. The a* increases sharply above a critical density ns=2×1014 m−2, which is consistent with the decrease of the screening length predicted by nonlinear-screening theory. Our analysis shows that the crossover from trions to the two-dimensional electron gas plus hole is generated by Coulomb screening in the high-electron-density regime, eliminating the possible mechanism by the trion localization effect due to the single-electron localization

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research