{"title":"Ultra-wideband tunable plasmonic selective absorber for dynamic synergistic solar and thermal energy conversion","authors":"Po-Chun Hsu","doi":"10.1117/12.2594981","DOIUrl":"https://doi.org/10.1117/12.2594981","url":null,"abstract":"Building heat management is responsible for approximately 15% of the global energy consumption and greenhouse gas emission. This energy consumption can be reduced if buildings can directly utilize the renewable thermal source/sink from the sun (solar heating) and the deep space (radiative cooling). This concept of \"net-zero-energy\" buildings requires a significant amount of research efforts in photonics and materials science. In this talk, I will introduce our recent work on the dynamic selective absorber that can control the absorption/emission spectral property from UV to mid-IR and electrochemically switch between solar heating and radiative cooling. For solar heating, the device has the ideal property of a selective solar absorber that absorbs strongly in the solar spectrum and emits poorly in mid-IR. For radiative cooling, the solar absorptivity decreases, and the mid-IR emissivity increases. The working principle is based on electrochemically reversible deposition of plasmonic nanoparticles that have broadband resonance in solar spectrum but act as a continuous metal film in mid-IR based on effective medium theory. For basic science, our work interrogates the fundamental interface chemistry to achieve the nanoparticle deposition and performs numerical modeling to guide the structure design. For application, if used as a smart building envelope, this device can switch and adapt to different weather, solar radiation, and occupant preference, thereby maximizing the utilization of renewable heat/cold sources.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132825452","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":"Active photonic platforms with structured nanoarrays","authors":"R. Biswas, Akshit Peer","doi":"10.1117/12.2594014","DOIUrl":"https://doi.org/10.1117/12.2594014","url":null,"abstract":"We describe active photonic platforms based on structured nano-arrays with periodicities in optical dimensions. Nanocup arrays coated with continuous non-conformal gold films were fabricated with replica molding and simulated with scattering matrix simulations. These exhibit extraordinary optical transmission (EOT) due to the optically thin gold film at the nanocup bottom. The optically enhanced field in nanocups enhanced the spontaneous emission of embedded quantum dots, with Purcell factor enhancements by >80 and measured photoluminescence lifetimes decreased by a factor of ~5 for a quantum dots ensemble. Soluble coatings on these nanocups showed slowed release rates, useful for biomedical applications. Nano-arrays control active light-emission, and surface charging and have promise for diverse nanoplasmonic applications.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117098104","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":"Integrated nanooptics with bulk transition metal dichalcogenides","authors":"A. Davoyan","doi":"10.1117/12.2594095","DOIUrl":"https://doi.org/10.1117/12.2594095","url":null,"abstract":"In this talk I will overview our ongoing theoretical and experimental work on light manipulation with bulk transition metal dichalcogenides (TMDCs). Specifically, I will show that owing to their high refractive index and strong anisotropy, structures made of bulk TMDC offer >30% stronger light confinement as compared to conventional semiconductor counterparts, paving the way to higher integration density and energy efficiency of optical devices. Several different types of classical and quantum structures made of TMDC materials, including waveguides, modulators and nanoscale cavities for quantum light emissions are discussed.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126351556","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}
Long Yuan, Jeeyoon Jeong, P. Padmanabhan, K. Kwock, T. Luk, P. Schuck, D. Yarotski, I. Brener, R. Prasankumar
{"title":"Controlling light-matter interactions in two-dimensional quantum materials with metasurfaces","authors":"Long Yuan, Jeeyoon Jeong, P. Padmanabhan, K. Kwock, T. Luk, P. Schuck, D. Yarotski, I. Brener, R. Prasankumar","doi":"10.1117/12.2593974","DOIUrl":"https://doi.org/10.1117/12.2593974","url":null,"abstract":"The combination of quantum materials and metasurfaces promises intrinsically new functionalities, driven by the wide range of novel phenomena inherent to quantum materials and the ability to control them with metamaterials. Two-dimensional (2D) quantum materials, such as graphene and transition metal dichalcogenides, have attracted much attention in this respect due to their ability to replicate nearly all of the properties of bulk quantum materials at the nanoscale and the relative ease in combining them with one another as well as incorporating them into new device architectures. Here, I will describe our recent studies combining 2D quantum materials and metasurfaces to achieve new and enhanced functionalities, including tunable THz transmission and Faraday rotation in graphene microribbon-based metasurfaces and control over exciton emission/dynamics in WSe2 monolayer/metasurface structures.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125566768","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}
Y. S. T. James, Zengguang Cheng, J. Feldmann, Xuan Li, N. Youngblood, U. E. Ali, C. Wright, W. Pernice, H. Bhaskaran
{"title":"Associative learning on phase change photonics","authors":"Y. S. T. James, Zengguang Cheng, J. Feldmann, Xuan Li, N. Youngblood, U. E. Ali, C. Wright, W. Pernice, H. Bhaskaran","doi":"10.1117/12.2593248","DOIUrl":"https://doi.org/10.1117/12.2593248","url":null,"abstract":"Associative learning as a building block for machine learning network is a largely unexplored area. We present in this paper our results on the demonstration of an all optical associative learning element, realized on an integrated photonic platform using phase change materials combined with on-chip cascaded directional couplers. We implement the framework on our optical on-chip associative learning network, and experimentally demonstrate image classification on a publicly-accessible cat-dog dataset. The experimental implementation harnesses optical wavelength division-multiplexing, thus increasing the information channel capacity to process our machine learning task. Our unconventional approach to machine learning demonstrated experimentally on an optical platform could potentially open up new research possibilities in machine learning hardware architectures and algorithms.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122942181","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":"Time-domain approach to Gaussian-convoluted dispersion models","authors":"L. Prokopeva, S. Chowdhury, A. Kildishev","doi":"10.1117/12.2594016","DOIUrl":"https://doi.org/10.1117/12.2594016","url":null,"abstract":"Gauss and convoluted Lorentz-Gauss models make an important class of broadband dispersion formulations for optical materials with structural or molecular disorder, including glasses, polymers, phase change materials, metals. So far, this important class of dispersion models has been inaccessible for time-domain solvers. We suggest a framework to model Gauss-type dispersion in time domain with a given accuracy, based on our previous Generalized Dispersive Material (GDM) model. The new explicit closed-form formulation of Gauss-based models and provided code package give a new physical interpretation in terms of coupled oscillators while also providing an efficient way to its time domain implementation for transient or nonlinear analysis in custom and commercial software.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121709506","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":"Turbulence management by spatiotemporal non-Hermitian modulation","authors":"S. B. Ivars, M. Botey, R. Herrero, K. Staliūnas","doi":"10.1117/12.2595565","DOIUrl":"https://doi.org/10.1117/12.2595565","url":null,"abstract":"We introduce a new method to affect the energy cascade through wavevectors accountable for the turbulence. By the introduction of a spatiotemporal non-Hermitian potential we have been able to tilt or promote the energy cascade to reduce or increase turbulence in the universal Complez Ginzburg Landau equation. This is possible thanks to the asymmetric properties of these type of potentials. We show that the most efficient management of the turbulence happens for a phase shift between the real and imaginary part of the modulation different from the one arising from a conventional PT-symmetric theory for transverse potentials. We have been able to physically and analiticaly understand this difference.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115634547","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":"Oscillation dynamics in active topological metamaterials","authors":"D. Sounas","doi":"10.1117/12.2594971","DOIUrl":"https://doi.org/10.1117/12.2594971","url":null,"abstract":"Recent years have witnessed significant interest in topological insulators (TIs), a new form of mater with low scattering states along their edges. This property can be useful for the design of passive or active devices, like defect-tolerant waveguides or lasers with robust extended lasing modes. In this talk we will discuss another interesting application of TIs, namely synchronization of oscillators. We will show that connecting oscillators along the edges of TIs allows their synchronization via the TI edge states with low sensitivity over the oscillator locations and perturbations of their parameters. We will present results for the nonlinear dynamics of such systems and outline potential applications in phased array antennas.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122913685","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":"The Zak phase for lossy 1D photonic structures","authors":"D. Felbacq, E. Rousseau, E. Kling","doi":"10.1117/12.2593805","DOIUrl":"https://doi.org/10.1117/12.2593805","url":null,"abstract":"We consider the topological aspects of wave propagation in 1D photonic crystals. It was shown by Zak that in 1D structures, bands could be characterized by means of a geometric phase, provided the structure possesses an inversion symmetry, that is the potential V is symmetric with respect to some point. This phase is defined as an integral over the Brillouin zone. We propose another view on the Zak phase, based on a dynamical system approach, that allows to identify the topological properties with the presence of poles of a meromorphic function. This allows to extend the notion to lossy systems. Numerical examples are given in the case of 1D structure whose basic period comprises two slabs filled with a homogeneous material.","PeriodicalId":112265,"journal":{"name":"Active Photonic Platforms XIII","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116177184","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}