Photocurrent spectroscopy of site-controlled pyramidal quantum dots
نویسندگان
چکیده
Intraband photocurrent spectroscopy of site-controlled pyramidal quantum dots by inserting them into the intrinsic region of n-i-n like quantum dot infrared photodetector structure is reported. The photovoltaic response is observed in the mid-infrared region. A peak responsivity of 0.4 mA/W at 120 meV (k1⁄4 10lm) is observed at 10 K at 2 V bias. The ability to engineer states in the conduction band of the QDs has been exploited to tune their photocurrent response from 10lm to 18lm with a narrow spectral width of Dk/k1⁄4 0.17.VC 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737426]
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تاریخ انتشار 2012