Msm Photodetector Thesis

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The goal of this research is to utilize the plasmonic phenomenon by using plasmonic gratings to develop and improve detectivity of metal-semiconductor-metal photodetectors (MSM-PDs) and sensitivity of SERS.

The dissertation includes the study of the substrate type ‒ Si O2 and Si O2/Si for SERS applications, and Ga As substrates for MSM PDs ‒ on the optical enhancement.

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The results suggest significant optical enhancements can be achieved by using tapered nanoslits instead of vertical sidewall structures.

Finally, the effect of the incident wave angle on the enhancements is considered as well.

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.

Application of Metal-Semiconductor-Metal Photodetector in High-Speed Optical Communication Systems, Advances in Optical Communication, Narottam Das, Intech Open, DOI: 10.5772/58997.

Available from: Farzaneh Fadakar Masouleh and Narottam Das (November 19th 2014).

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