Plasmonics-integrated Ge PIN-photodetectors: Efficiency enhancement by Al nanoantennas and plasmon detection
Fischer IA, Augel L, Jitpakdeebodin S, Franz N, Fleischer S, Schulze J (2015)
Publication Type: Conference contribution
Publication year: 2015
Journal
Publisher: SPIE
Book Volume: 9654
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Kolkata
ISBN: 9781628418644
DOI: 10.1117/12.2192161
Abstract
The aim of integrating plasmonic functionality with photonic devices is twofold: on the one hand, plasmonic nanoantennas can enhance the functionality of photonic devices and enable their miniaturization. On the other hand, photonic devices can be a part of plasmonic transmission lines and act e.g. as plasmon detectors. Here, we present results on both aspects in a CMOS-compatible device setup using Ge PIN-photodetectors and Al nanostructures. Plasmonic nanoantennas are metallic nanostructures that enable the control and manipulation of optical energy in the visible and near-infrared spectrum and have been proposed as a means to enhance absorption and quantum yields for photovoltaics, to increase spatial resolution for optical microscopes and to enhance the energy efficiency of light-emitting devices. We present experimental results on the enhancement of Ge PIN-photodetector efficiency by Al nanoantennas. In order to investigate plasmon waveguiding and detection, metal grating structures and metal-insulator-metal slot waveguides were fabricated by electron beam lithography in the Al metallization layer of Ge PIN-photodetectors. Photocurrent maps of the devices under local illumination show that plasmons can be optically excited at the grating and are then guided by the slot waveguide towards the Ge PIN-photodetector where they are detected as photocurrent. Using Ge PIN-photodetectors and Al nanostructures as a CMOS-compatible device setup, we show how plasmonic nanostructures can be used for efficiency enhancement of photonic devices and discuss plasmon detection with Ge PIN-photodetectors with possible applications.
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Germany (DE)How to cite
APA:
Fischer, I.A., Augel, L., Jitpakdeebodin, S., Franz, N., Fleischer, S., & Schulze, J. (2015). Plasmonics-integrated Ge PIN-photodetectors: Efficiency enhancement by Al nanoantennas and plasmon detection. In Kallol Bhattacharya, Rajib Chakraborty (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Kolkata, IN: SPIE.
MLA:
Fischer, Inga A., et al. "Plasmonics-integrated Ge PIN-photodetectors: Efficiency enhancement by Al nanoantennas and plasmon detection." Proceedings of the International Conference on Optics and Photonics 2015, ICOP 2015, Kolkata Ed. Kallol Bhattacharya, Rajib Chakraborty, SPIE, 2015.
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