Each of the junctions between different bandgap materials is called a " heterostructure ", hence the name " double heterostructure laser " or " DH " laser.
32.
Yet another hot topic is multiferroics, where researchers are looking for ways to couple magnetic and ferroelectric ordering within a material or heterostructure; there are several recent reviews on this topic.
33.
In the mid-1950s, while working at the RCA Laboratories, Herbert Kroemer developed key aspects of his theories of heterostructure physics for which he was a co-recipient of the Nobel Prize in Physics.
34.
He realized that, instead of the optical absorption increasing smoothly as it does in ordinary semiconductors, the absorption of a thin heterostructure ( when plotted versus photon energy ) would appear as a series of steps.
35.
Alferov, 70, and Kroemer, a 72-year-old German-born U . S . citizen, independently proposed the heterostructure laser, made of semiconducting material as thin as a few atoms apiece.
36.
Contrary to the classical superlattices ( 1D / 3D, that is 1D modulation of electrons in 3D bulk ) described above, this is typically achieved by treating the heterostructure surface : depositing a suitably patterned metallic gate or etching.
37.
The achievement of the first 300�K continuous wave diode laser was reported in " Investigation of the influence of the AlGaAs-GaAs heterostructure parameters on the laser threshold current and the realization of the continuous emission at the room temperature"
38.
As a function of the width of the point contact ( or gate voltage in the case of GaAs / AlGaAs heterostructure devices ), the conductance shows a staircase behavior as more and more modes ( or channels ) contribute to the electron transport.
39.
In 1970, the first GaAs heterostructure solar cells were created by the team led by Zhores Alferov in the USSR . In the early 1980s, the efficiency of the best GaAs solar cells surpassed that of conventional, crystalline silicon-based solar cells.
40.
Experimental results for a 2D hole gas in a GaAs / AlGaAs heterostructure ( which, despite being clean, may not correspond exactly to the idealized jellium model ) indicate a Wigner crystallization density of r _ s = 35.1 ( 9 ).
