Browsing by Keywords "Near Infrared"
Now showing items 1-6 of 6
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High efficiency monolithic photodetectors for integrated optoelectronics in the near infrared
(IEEE, 2009)Monolithic Germanium photodetectors integrated on Si with external efficiency up to 68% at 1550nm and low dark current density 3.2mA/cm2 are demonstrated. The absorption edge red shifted by 47nm corresponding to bandgap ... -
Optically thin composite resonant absorber at the near-infrared band: A polarization independent and spectrally broadband configuration
(Optical Society of American (OSA), 2011)We designed, fabricated, and experimentally characterized thin absorbers utilizing both electrical and magnetic impedance matching at the near-infrared regime. The absorbers consist of four main layers: a metal back plate, ... -
Plasmonic gratings for enhanced near infrared sensitivity of Silicon based Schottky photodetectors
(IEEE, 2011)Schottky photodetectors have been intensively investigated due to their high speeds, low device capacitances, and sensitivity in telecommunication standard bands, in the 0.8μm to 1.5μm wavelength range. Due to extreme cost ... -
Silicon-Germanium multi-quantum well photodetectors in the near infrared
(Optical Society of American (OSA), 2012)Single crystal Silicon-Germanium multi-quantum well layers were epitaxially grown on silicon substrates. Very high quality films were achieved with high level of control utilizing recently developed MHAH epitaxial technique. ... -
Ultra-low-cost broad-band near-infrared silicon photodetectors based on hot electrons
(Bilkent University, 2015)Silicon is at the heart of all of the end-user digital devices such as smart phones, laptops, and wearable technologies. It is the holy grail for the largescale production of semiconductor devices since start of the ... -
Validation of electromagnetic field enhancement in near-infrared through Sierpinski fractal nanoantennas
(Optical Society of American (OSA), 2014)We introduced fractal geometry to the conventional bowtie antennas. We experimentally and numerically showed that the resonance of the bowtie antennas goes to longer wavelengths, after each fractalization step, which is ...
