Exploring the novel physics of
quantum heterostructures

Please bear with us --- this section is still under construction ---
we are still putting in descriptions of the physical applications.
You are welcome to see the pictures that are in place! So please continue.

Solving the Schrodinger and Poisson equations simultaneously


Click on the icon to see a larger picture of the 
band-bending due to modulation doping. 
















Magneto-optics of semiconductor heterostructures













 




Click on the icon to see a larger picture of the 
Landau orbits in Faraday and Voigt configurations. 

















Electro-optic modulation of absorption 

through intervalley transfer of carriers












 






Click on the icon to see a larger picture of the bandstructure 
of the intervalley-transfer absorption electro-optic modulator. 

















Piezospectroscopy of quantum heterostructures















 




Click on the icon to see a larger picture of the 
quasibound states in a compositionally  asymmetric quantum well.















 






Click on the icon to see a larger picture of the 
piezomodulation spectrum of a 20 Angstrom asymmetric  quantum well.

















 






Click on the icon to see a larger picture of the 
piezomodulation spectrum of a 20 Angstrom symmetric quantum well.
















 




Click on the icon to see a larger picture of the 
confined states at a surface quantum well and in a barrier material.
















 




Click on the icon to see a larger picture of the 
spectacular energy level spectrum associated with states in a surface quantum
well and 
above-barrier  states. Over 69 states were identified in the
structure.















 Tight-binding modeling of heterostructures:

 new features












 




Click on the icon to see a larger picture of the features
included in the software based on the Tigbt-Binding Model. 


















 




Click on the icon to see a larger picture of the 
mechanism of G-X intervalley
transfer laser. 










Our  interactions with experimental  groups at MIT, Purdue,
Notre  Dame,   U_Houston,  U_Missouri   at  Columbia, Naval
Research Labs,    and our  clients elsewhere    have helped
establish the   applicability  of our    finite element and
tight-binding methods and authenticated the computer codes.


We see from the above examples that the opportunities to 
explore novel physical mechanisms through wavefunction
engineering are without limit.







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