ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
We report the design, characterization and fabrication of GaAs/AlGaAs quantum wellinfrared photodetectors (QWIPs) to achieve intersubband transitions at expected long wavelengths.With eight-band k·p model, we calculated the E2-E1 transition energies of GaAs/Al0.25Ga0.75AsQWs with the different well widths. According to the calculation, we designed a QWIP with theestimated detection wavelength around 9 μm. The actual device structure parameters, such as wellwidth and Al composition, were confirmed by the XRD measurements. The absorption peak at 9.46μm and the peak responsivity at 8.7 μm are obtained, which are very close to the simulation results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.31.105.pdf
Permalink