Au grating on SiC substrate: simulation of high performance plasmonic Schottky barrier photodetector in visible and NIR regions

Abstract

Plasmonically enhanced light absorption in Schottky barrier photodetectors (PDs) can be achieved by engineering metallic nanostructures. In this context, gold (Au) gratings on titanium (Ti)/silicon carbide (SiC) based Schottky barrier is proposed in this work for photodetection application. Further, the effects of various grating parameters and incident angle on absorbance are demonstrated. The grating based structure is able to provide ~85% incident light absorption leading to a significantly high responsivity value as compared with that of conventional (without metallic grating) structure. High unbiased responsivity values of 4.396 mA W−1 and 2.496 mA W−1 are obtained for Au/Ti/6H-SiC Schottky barrier PD at wavelengths of 694.5 nm and 1035 nm, respectively based on Fowler’s model. In view of advanced properties of SiC, the present work will open new opportunities for plasmonic PDs based on SiC platform.

Aluminum-Based Plasmonic Photodetector for Sensing Applications

“…Such spatial localization of the electromagnetic field at the incident photon energy greater than the band gap of the semiconductor contributes to an increase in the generation of electron-hole pairs in it near the contact with the metal and a corresponding increase in the photocurrent in the presence of a built-in electric field separating the charge carriers. At energies lower than the band gap, the excitation of hot electrons in the metal film with subsequent ballistic transport to the semiconductor region with the built-in electric field is possible [8][9][10][11]. Thus, the spectral sensitivity range of such photodetectors can extend beyond the band-to-band generation region by expanding into the red spectral region.…”

High-responsivity dual-frequency hot-electron photodetectors with magnetic polaritons beneath metal grating strips

“…Also, the ability for the HEPDs to work in the telecommunication band and integrate with waveguides shows its great potential in photonic integrated circuits [5,6]. In the past decade, researchers have conducted a lot of plasmonic structures including metal nanoparticles, gratings, and nanorods to excite the SPs or guided mode resonance to enhance the light absorption of HEPDs [7][8][9][10][11][12][13][14][15].…”

An Experimental Study on Artificial Intelligence‐Based Prediction of Capacitance–Voltage Parameters of Polymer‐Interface 6H‐SiC/MEH‐PPV/Al Schottky Diodes

“…Barrier diodes are used in many areas, from energy to optoelectronic systems, especially sensors. [4][5][6][7] One of these diodes is 6H-SiC-based Schottky diodes. These diodes have attracted attention with their operability, especially in extreme conditions.…”