{"title":"Coherent all-optical sygnal processing with plasmonic metamaterials: Demonstration of 100THz bandwidth and quantum-level operations","authors":"N. Zheludev, D. Faccio","doi":"10.1109/PHOSST.2015.7248210","DOIUrl":"https://doi.org/10.1109/PHOSST.2015.7248210","url":null,"abstract":"We report recent experiments demonstrating that coherently controlled redistribution of energy at plasmonic metamaterials can underpin various forms of optical switching and show that devices based on coherent control can operate down to single photon level and with a modulation bandwidth up to 100 THz.","PeriodicalId":349795,"journal":{"name":"2015 IEEE Summer Topicals Meeting Series (SUM)","volume":"359 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122752899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"UV LED performance and applications","authors":"M. Shatalov","doi":"10.1109/PHOSST.2015.7248166","DOIUrl":"https://doi.org/10.1109/PHOSST.2015.7248166","url":null,"abstract":"We discuss current status of deep ultraviolet (DUV) light emitting diode (LED) development, factors affecting external quantum efficiency, droop and reliability of AlGaN DUV LEDs and review their applications in disinfection, sensing and industrial applications.","PeriodicalId":349795,"journal":{"name":"2015 IEEE Summer Topicals Meeting Series (SUM)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131971776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Dhall, M. Neupane, D. Wickramaratne, M. Mecklenburg, Zhen Li, C. Moore, R. Lake, S. Cronin
{"title":"Bulk direct band gap MoS2 by plasma induced layer decoupling","authors":"R. Dhall, M. Neupane, D. Wickramaratne, M. Mecklenburg, Zhen Li, C. Moore, R. Lake, S. Cronin","doi":"10.1109/PHOSST.2015.7248223","DOIUrl":"https://doi.org/10.1109/PHOSST.2015.7248223","url":null,"abstract":"We report a robust method for engineering the optoelectronic properties of many-layer MoS2 using low energy oxygen plasma treatment. Gas phase treatment of MoS2 with oxygen radicals generated in an upstream N2-O2 plasma is shown to enhance the photoluminescence (PL) of many-layer, mechanically exfoliated MoS2 flakes by up to 20 times, without reducing the layer thickness of the material. A blue shift in the photoluminescence spectra and narrowing of linewidth is consistent with a transition of MoS2 from indirect to direct band gap material. Atomic force microscopy and Raman spectra reveal that the flake thickness actually increases as a result of the plasma treatment, indicating an increase in the interlayer separation in MoS2. Ab-initio calculations reveal that the increased interlayer separation is sufficient to decouple the electronic states in individual layers, leading to a transition from an indirect to direct gap semiconductor. With optimized plasma treatment parameters, we observed enhanced PL signals for 32 out of 35 many-layer MoS2 flakes (2-15 layers) tested, indicating this method is robust and scalable. Monolayer MoS2, while direct band gap, has a small optical density, which limits its potential use in practical devices. The results presented here provide a material with the direct band gap of monolayer MoS2, without reducing sample thickness, and hence optical density.","PeriodicalId":349795,"journal":{"name":"2015 IEEE Summer Topicals Meeting Series (SUM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121861526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Menyuk, R. J. Weiblen, J. Hu, I. Aggarwal, L. Shaw, J. Sanghera
{"title":"Maximizing the bandwidth while minimizing the spectral fluctuations using supercontinuum generation in photonic crystal chalcogenide fibers","authors":"C. Menyuk, R. J. Weiblen, J. Hu, I. Aggarwal, L. Shaw, J. Sanghera","doi":"10.1117/12.2031967","DOIUrl":"https://doi.org/10.1117/12.2031967","url":null,"abstract":"Supercontinuum generation in the mid-infrared (mid-IR) spectrum has a broad array of potential applications in medicine, environmental sensing, and defense. Mid-IR sources play a crucial role in defending aircraft against missile attacks [1]. It is desirable to have a source that acts like a mid-IR “light bulb” to produce a broadband, flat, and incoherent spectrum. In work to date, we have demonstrated that it is possible to obtain a bandwidth of 4 μm in As2Se3 chalcogenide hexagonal photonic crystal fibers that are pumped at 2.5 μm with pulse durations that are 500 fs or longer and pump peak powers of 1 kW or more with careful design of the fiber parameters [2]. We have also shown that it is possible to put more than 25% of the power in the range of 3-5 μm in As2S3 chalcogenide fibers with a pump at 2 μm [3].","PeriodicalId":349795,"journal":{"name":"2015 IEEE Summer Topicals Meeting Series (SUM)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133290900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}