scholarly journals Terahertz-field-induced tunneling current with nonlinear effects in a double quantum well coupled to a continuum

2009 ◽  
Vol 106 (12) ◽  
pp. 123703 ◽  
Author(s):  
Marcelo Z. Maialle ◽  
Marcos H. Degani ◽  
Justino R. Madureira ◽  
Paulo F. Farinas
Keyword(s):  
Quantum Well ◽  
Tunneling Current ◽  
Nonlinear Effects ◽  
Double Quantum ◽  
Double Quantum Well

Well width dependence of tunneling current in double-quantum-well resonant interband tunnel diodes

1992 ◽  
Vol 13 (3) ◽  
pp. 155-157 ◽  
Author(s):  
A.G. MacDonald ◽  
L.V. Iogansen ◽  
D.J. Day ◽  
M. Sweeny ◽  
J. Xu
Keyword(s):  
Quantum Well ◽  
Tunneling Current ◽  
Double Quantum ◽  
Tunnel Diodes ◽  
Double Quantum Well ◽  
Resonant Interband Tunnel Diodes

Wavelength and threshold current variation in inhomogeneously pumped InGaAs/AlGaAs single and double quantum well ridge wave-guide lasers

1992 ◽  
Vol 70 (10-11) ◽  
pp. 908-913
Author(s):  
K. A. McGreer ◽  
D. Moss ◽  
R. L. Williams ◽  
M. Dion ◽  
D. Landheer
Keyword(s):  
Quantum Well ◽  
Threshold Current ◽  
Wave Guide ◽  
Double Quantum ◽  
Wavelength Shift ◽  
Exponential Dependence ◽  
Lasing Wavelength ◽  
Output Wavelength ◽  
Double Quantum Well ◽  
Current Variation

We investigate the wavelength and threshold current variation with passive wave-guide length in inhomogeneously pumped single and double quantum well InGaAs/AlGaAs strained layer ridge wave-guide lasers. We observe a linear and extremely low increase in threshold current with unpumped length, both for single and double quantum well lasers. A large red shift in the lasing wavelength as the unpumped length is increased is also observed. We present a model, based on absorption saturation in the unpumped section, which describes both the wavelength shift and the threshold current variation. The increase in threshold current that we observe is much smaller than results reported in the literature for GaAs/AlGaAs lasers, where a large exponential dependence was attributed to gain saturation in the pumped section. Because the threshold current does not dramatically vary with unpumped length for our lasers, this is a potentially useful technique for shifting the output wavelength of the laser. Finally, we investigate the wavelength tuning behavior of lasers having two segments pumped with different currents. A wavelength tunability of ~13 nm for the DQW laser was observed.

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