Active Photonic Platforms X最新文献_第4页

Mapping temperature distribution of optically pumped gap plasmon structure using thermoreflectance imaging (Conference Presentation) 利用热反射成像绘制光泵隙等离子体结构的温度分布(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2321104

Di Wang, K. Maize, Y. Koh, Maowen Song, A. Boltasseva, V. Shalaev, A. Shakouri, A. Kildishev

{"title":"Mapping temperature distribution of optically pumped gap plasmon structure using thermoreflectance imaging (Conference Presentation)","authors":"Di Wang, K. Maize, Y. Koh, Maowen Song, A. Boltasseva, V. Shalaev, A. Shakouri, A. Kildishev","doi":"10.1117/12.2321104","DOIUrl":"https://doi.org/10.1117/12.2321104","url":null,"abstract":"Student contribution: Plasmonic systems are efficient in converting optical energy into heat hence show technological significance in solar thermophotovoltaics, nanoparticle manipulation, and photocatalysis, etc. Conventional techniques to characterize plasmonic heaters are mostly thermal camera- and thermographic phosphor (TGP)- based. In this work, we present our results of characterizing a plasmonic heater using thermoreflectance imaging (TRI). The TRI technique presented here outperforms thermal camera-based technique in spatial resolution due to the visible light utilized for illumination, and does not require special sample preparation as in TGP-based technique. We chose to use a gap plasmon structure to maximize the optical absorption, and fabricated structures with various dimensions that exhibit varying optical absorptions at a fixed wavelength of 825 nm, which is the wavelength of pump light used in the TRI measurement. The TRI setup uses a millisecond-modulated continuous-wave pump laser to induce local temperature fluctuation on the sample surface, a 530 nm LED probe light then senses the change in the temperature-dependent material reflectance between high and low temperatures, which combined with a pre-calibrated thermoreflectance coefficient can be used to calculate the temperature rise on each image pixel. This technique grants us a resolution of ~200 nm. The experimentally obtained temperature rise on various gap plasmon structures correlates well with their optical absorption, and we compare the results against a finite element heat transfer model. Using a separate pump-probe thermoreflectance technique, we experimentally obtain the heat transfer dynamics of such gap plasmon structure under laser irradiation with picosecond resolution.","PeriodicalId":346327,"journal":{"name":"Active Photonic Platforms X","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122889216","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}

引用次数: 0

Analytical modeling of graphene plasmons (Conference Presentation) 石墨烯等离子体的分析建模(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2320131

Renwen Yu, J. Cox, J. R. M. Saavedra, J. D. Abajo

引用次数: 0

Double blind ultrafast pulse characterisation by mixed frequency generation in gold antennas (Conference Presentation) 金天线中混合频率产生的双盲超快脉冲特性(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2320736

Sylvain D. Gennaro, Yi Li, S. A. Maier, R. Oulton

引用次数: 0

Voltage tuning of reflectance from a strongly coupled metasurface-semiconductor hybrid structure (Conference Presentation) 强耦合超表面-半导体混合结构反射率的电压调谐(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2321256

R. Sarma, S. Campione, M. Goldflam, J. Shank, Sean W. Smith, J. Noh, P. Ye, M. Sinclair, G. Subramania, I. Ruiz, S. Howell, J. Wendt, I. Brener

{"title":"Voltage tuning of reflectance from a strongly coupled metasurface-semiconductor hybrid structure (Conference Presentation)","authors":"R. Sarma, S. Campione, M. Goldflam, J. Shank, Sean W. Smith, J. Noh, P. Ye, M. Sinclair, G. Subramania, I. Ruiz, S. Howell, J. Wendt, I. Brener","doi":"10.1117/12.2321256","DOIUrl":"https://doi.org/10.1117/12.2321256","url":null,"abstract":"Metasurfaces have been investigated for various applications ranging from beam steering, focusing, to polarization conversion. Along with passive metasurfaces, significant efforts are also being made to design metasurfaces with tunable optical response. Among various approaches, voltage tuning is of particular interest because it creates the possibility of integration with electronics. In this work, we demonstrate voltage tuning of reflectance from a complementary metasurface strongly coupled to an epsilon-near-zero (ENZ) mode in an ultrathin semiconductor layer. Our approach involves electrically controlling the carrier concentration of the ENZ layer to modulate the polaritonic coupling between the dipole resonances of the metasurface and the ENZ mode for modulating the reflectance of the metasurface. The hybrid structure we fabricate is similar to MOSCAP configuration where the complementary metasurface offers a continuous gold top layer for biasing and positive/negative bias to the metasurface leads to accumulation/depletion of carriers in the ENZ layer beneath it. We optimized our structure by using InGaAs as the ENZ material because of its high mobility and low effective mass. This allowed us to reduce the doping requirement and thereby reduce the ionized impurity scattering as well as the reverse bias required to deplete the ENZ layer. For low leakage and efficient modulation of carrier density, we used Hafnia as the gate dielectric. We further added a reflecting backplane below the ENZ layer to enhance the interaction and by applying bias, we achieved spectral shifts of 500 nm and amplitude modulation of 11% of one of the polariton branches at 14 µm.","PeriodicalId":346327,"journal":{"name":"Active Photonic Platforms X","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129434322","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}

引用次数: 0

MXenes for nanophotonic and metamaterial devices (Conference Presentation) 用于纳米光子和超材料器件的MXenes(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2320696

K. Chaudhuri, Zhuoxian Wang, Mohamed Alhabeb, Xiangeng Meng, S. Azzam, A. Kildishev, Young L. Kim, V. Shalaev, Y. Gogotsi, A. Boltasseva

{"title":"MXenes for nanophotonic and metamaterial devices (Conference Presentation)","authors":"K. Chaudhuri, Zhuoxian Wang, Mohamed Alhabeb, Xiangeng Meng, S. Azzam, A. Kildishev, Young L. Kim, V. Shalaev, Y. Gogotsi, A. Boltasseva","doi":"10.1117/12.2320696","DOIUrl":"https://doi.org/10.1117/12.2320696","url":null,"abstract":"MXenes are a recently discovered family of two-dimensional nanomaterials formed of transition metal carbides and carbon nitrides with the general chemical form Mn+1XnTx, where ‘M’ is a transitional metal, ‘X’ is either C or N, and ‘T’ represents a surface functional group (O, -OH or -F). MXenes are derived from layered ternary carbides and nitrides known as MAX (Mn+1AXn) phases by selective chemical etching of the ‘A’ layers and addition of functional groups ‘T’.\u0000 \u0000In our work, we focus on one of the most well studied MXene, titanium carbide (Ti3C2Tx). Single to few layer flakes of Ti3C2Tx (in a solution dispersed form) are used to create a continuous film on a desired substrate by using spin coating technique. Losses inherent to the bulk MXene and existence of strong localized SP resonances in Ti3C2Tx disks/pillar-like nanostructures at near-IR frequencies are utilized to design an efficient broadband absorber. For Ti3C2Tx MXene disk array sitting on a bilayer stack of Au/Al2O3, high efficiency (>90%) absorption across visible to near-IR frequencies (bandwidth ~1.55 μm), is observed experimentally. \u0000\u0000We also experimentally study random lasing behavior in a metamaterial constructed by randomly dispersing single layer nanosheets of Ti3C2Tx into a gain medium (rhodamine 101, R101). Sharp lasing peaks are observed when the pump energy reaches the threshold value of ~ 0.70 μJ/pulse. This active metamaterial holds a great potential to achieve tunable random lasing by changing the optical properties of Ti3C2Tx flakes.","PeriodicalId":346327,"journal":{"name":"Active Photonic Platforms X","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122975749","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}

引用次数: 0

Optical thermal management and real‐time molecular sensing with hybrid nanocavity (Conference Presentation) 基于混合纳米腔的光学热管理和实时分子传感(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2321281

D. Zuev, V. Milichko, D. Baranov, G. Zograf, K. Volodina, A. Krasilin, I. Mukhin, P. Dmitriev, V. Vinogradov, S. Makarov, P. Belov

引用次数: 0

Sum rules and power bandwidth limits to near-field optical response (Conference Presentation) 近场光响应的和规则和功率带宽限制(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2319642

Hyungki Shim, L. Fan, Steven G. Johnson, O. Miller

引用次数: 1

Plasmonic nanoantennas for twisted light (Conference Presentation) 用于扭曲光的等离子体纳米天线(会议报告)

Active Photonic Platforms X Pub Date : 2018-09-17 DOI: 10.1117/12.2322371

O. Hess