Recent advances in short-wave infrared (SWIR) technology including numerous new applications in civil areas, fusion with visible wavelengths, and integration with active imaging systems triggered the SWIR photodetector research at ASELSAN for both passive and active imaging. SWIR focal plane arrays with a 640x512 format and 15μm pitch were developed and coupled with ASEL64015C readout circuits which had been designed at ASELSAN as well. Through extensive research and development dark current density values <10 nA/cm2 (at 20°C) and operabilities >;99% were achieved. This paper reviews the work that has been conducted on SWIR detector development at ASELSAN.
KEYWORDS: Data transmission, Eye, Signal attenuation, Chemical vapor deposition, Resistance, Indium, Scanning electron microscopy, Oxides, Electrodes, Nanowires
We investigated the data transmission performance of indium antimonide (InSb) nanowires (NWs) synthesized on InSb
(100) substrate using chemical vapor deposition (CVD) having diameters below 20 nm. The data transmission
measurement was accomplished over the NW field effect transistors (NWFETs) fabricated on Si/SiO2 substrates. Digital
data stream is randomly generated and then uploaded to a waveform generator which generates the stream and transmits
it repeatedly with the desired frequency. The signal was applied on the sources of the NWFETs and collected from the
drains of the same devices. Collected data was first filtered with a low pass filter (LPF), and then the output of the filter
was used to create the eye diagrams of the NWs. Bit error rate (BERs), attenuation , quality factor (Q-factor) and
maximum data transmission are extracted from eye diagrams. The results indicate that the data transmission performance
of NWs suffer from low mobility values on the order of 10-to-15 cm2V-1s-1 because of their small diameters, crystal defects and oxidation occurs during growth and cooling. 20 nm NWs can sustain data rates up to 10 mega bits per second (Mbps) and the data rate is directly proportional to the diameter of the NWs.
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