Msm Photodetector Thesis

Msm Photodetector Thesis-68
In addition, the impact of the period of the nanograting, single and dual-width structures, is examined as well.Then, a comparison is conducted between these types to determine the optimum periods.

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High detectivity along with a simple fabrication process endows these laterally mesoporous Ga N photodetectors with great potential for applications that require selective detection of weak optical signals in the UV range.

This dissertation is aimed to numerically study the effect of plasmonic grating electrodes on the efficiency of metal-semiconductor-metal photodetectors (MSM PDs) and the sensitivity of Surface Enhanced Raman Spectroscopy (SERS).

Using this method indicates that since plasmonic hot spots align well with areas of large current density, the optical enhancement can play an even larger role in total current improvement.

The impact of taper angles, positive and negative, is also studied in detail.

In the electroless etching, a delay time (T) of 2 min was applied. Both samples were annealed at 800 o C for 24 hours and characterized by using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).

After that a cycle time (T) and pause time () of pulsed current were supplied throughout the 30 min PEC etching process. The band gap energies for both samples were determined by using UV-Vis NIR Spectroscopy.

A physical model based on band energy theory was developed to illustrate the origin of the photoresponse at 0 V in our device.

Our findings provide a new route to realizing self-powered photodetectors.


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