Tim K Hossain

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We report on a photon detector aimed at low light detection, which is based on the combination of small sensing volumes and large absorbing regions. Fabricated devices show stable gain values in the range of 1000–10 000 at bias voltages of ϳ1 V at 1.55 ␮m at room temperature. Submicron devices show dark current less than 90 nA and unity gain dark current(More)
The noise performance of an infrared injection photon detector with very high internal gain was investigated at a wavelength of 1.55 mum. The devices showed sub-Poissonian shot noise with Fano factors around 0.55 at 0.7 V at room temperature. Optical to electrical conversion factors of 3000 electrons per absorbed photon were recorded at 0.7 V. The change in(More)
We have successfully fabricated freestanding single-crystal 6H-SiC cantilevers of several microns size using bulk micromachining with an inductively coupled plasma reactive ion etching system. We have also used these SiC cantilever structures to measure Young's modulus through the use of an atomic force microscope. The measurements were performed on a(More)
—The transient response of a nanoinjection infrared photon detector was studied by exploring the relation between lateral charge transfer and jitter. The jitter of the device was measured to be 15 ps at room temperature. The jitter was almost independent of the pulse power, even after device saturation. Spatial maps for delay and amplitude were acquired.(More)
A low-resistance ohmic contact to Mg-doped p-type GaN grown by metal-organic chemical vapor deposition (MOCVD) with a carrier concentration of 2 · 10 17 cm À3 using Pd/Ni/Au metallization was formed. An anneal at 500 °C for 1 min in a flowing N 2 ambient produced an excellent ohmic contact with a specific contact resistivity as low as 2.4 · 10 À5 X cm 2.(More)
A novel short wave infrared single photon detector was conceived for wavelengths beyond 1 µm. The detector, called the nano-injection photon detector, is conceptually designed with biological inspirations taken from the eye. Based on a detection process similar to the human visual system, the detector couples a nano-scale sensory region with a large(More)
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