@inproceedings{9a0f7439fe1b44aeaa450c0db9b6dfd7,
title = "Enhancement in device performance of hepta-layer coupled InGaAs quantum dot infrared detector by AuGe surface plasmons",
abstract = "In this work, we have studied the effect of AuGe alloy nanoparticles deposition on properties of molecular beam epitaxy grown heptalayer coupled InGaAs 5.25 mono-layer quantum-dots (QDs) samples. AuGe 12 nm film was deposited using electron beam evaporator on these samples which were later annealed at 300 °C to create AuGe nanoparticles. SEM measurement confirms formation of AuGe nanoparticles which support surface Plasmon modes. The PL spectra at 20K confirms maximum enhancement of 53% in intensity of peak at ∼1123 nm for 300 °C annealed sample in comparison to as-grown (without nanoparticle) sample. Single pixel detectors were fabricated from asgrown and 300°C annealed nanoparticle sample using two level lithography and wet etching process. We have observed two-order and one-order augmentation in responsivity and detectivity from device having nanoparticles compared to the as-grown respectively at 80K. Peak detectivity of 4.2×107cm.Hz 1/2/W at 80K was observed for device having nanoparticles. Around 30% increment in spectral response having peak around 5μm at-1V bias for device having AuGe nanoparticles compared to the as-grown device was observed. The observed enhancement is due to increase light trapping or light scattering into the device by nanoparticles. Demonstration of this plasmonic-based detector will move forward the development of high-performance infrared QDs detectors.",
keywords = "AuGe nanoparticles, InGaAs QDs, MBE, PL, QDIPs",
author = "Pandey, {Sushil Kumar} and Lavi Tyagi and Hemant Ghadi and Harshal Rawool and Subhananda Chakrabarti",
note = "Publisher Copyright: {\textcopyright} 2016 SPIE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; 2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV ; Conference date: 28-08-2016 Through 01-09-2016",
year = "2016",
doi = "10.1117/12.2237551",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Satoshi Kawata and Tsai, {Din Ping}",
booktitle = "Plasmonics",
address = "United States",
}