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Room-temperature, mid-infrared electroluminescence from single-stage intersubband -based edge emitters
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10.1063/1.1819518
/content/aip/journal/apl/85/20/10.1063/1.1819518
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/20/10.1063/1.1819518
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Conduction-band-energy diagram of the “injector active region” of the device when states and are at resonance, under an applied electric field . Shown are the moduli squared of the relevant wave functions. The injector region is -type doped over the indicated range. The layer thicknesses in nm from left to right are: ; where the barriers are underlined. The first four layers are , where is 0.02, 0.04, 0.06, and 0.08, respectively.

Image of FIG. 2.
FIG. 2.

Intersubband electroluminescence spectra at: (a) , for four different currents under pulsed conditions (, ). The low-energy peak is due to photon-assisted tunneling of electrons from the injector ground state (level ) to the state; while the high-energy peak is due to the vertical transition between the and states; (b) room temperature and drive current (i.e., current density).

Image of FIG. 3.
FIG. 3.

Light-current curves under pulsed-drive conditions (, ) at and at room temperature.

Image of FIG. 4.
FIG. 4.

Conduction-band-energy diagram for device optimized for 95% tunneling-injection efficiency from the state to the state. The injector region is -type doped just as shown in Fig. 1 for the nonoptimized device. The layer thicknesses in nm from left to right are: ; where the barriers are underlined.

Image of FIG. 5.
FIG. 5.

Intersubband electroluminescence spectra at and at room temperature for the optimized device shown in Fig. 4.

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/content/aip/journal/apl/85/20/10.1063/1.1819518
2004-11-15
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Room-temperature, mid-infrared (λ=4.7μm) electroluminescence from single-stage intersubband GaAs-based edge emitters
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/20/10.1063/1.1819518
10.1063/1.1819518
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