Browsing by Keywords "Infrared devices"
Now showing items 1-17 of 17
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Bulanıklık tespiti birikimli olasılığına dayalı kızılötesi kamera otomatik odaklanması
(IEEE, 2014-04)Nesne iz ölçümü ve analizinde kızılötesi (KÖ) kameralar önemli bir rol oynamaktadır. Özellikle araştırma ve askeri amaçlı kullanılan bilimsel KÖ kameralarda odaklama el ile yapılmakta ve bu durum alınan ölçümün hassasiyet ... -
Differentiation and localization of target primitives using infrared sensors
(IEEE, 2002-09-10)This study investigates the use of low-cost infrared sensors in the differentiation and localization of commonly encountered target primitives in indoor environments, such as planes, corners, edges, and cylinders. The ... -
Ensemble pruning for text categorization based on data partitioning
(Springer, Berlin, Heidelberg, 2011)Ensemble methods can improve the effectiveness in text categorization. Due to computation cost of ensemble approaches there is a need for pruning ensembles. In this work we study ensemble pruning based on data partitioning. ... -
High performance infrared photodetectors up to 2.8 μm wavelength based on lead selenide colloidal quantum dots
(OSA - The Optical Society, 2017)The strong quantum confinement effect in lead selenide (PbSe) colloidal quantum dots (CQDs) allows to tune the bandgap of the material, covering a large spectral range from mid- to near infrared (NIR). Together with the ... -
Idler-efficiency-enhanced long-wave infrared beam generation using aperiodic orientation-patterned GaAs gratings
(Optical Society of America, 2016)In this paper, we design aperiodic gratings based on orientation-patterned gallium arsenide (OP-GaAs) for converting 2.1 μm pump laser radiation into long-wave infrared (8-12 μm) in an idler-efficiency-enhanced scheme. ... -
Large area compatible broadband superabsorber surfaces in the VIS-NIR spectrum utilizing metal-insulator-metal stack and plasmonic nanoparticles
(OSA - The Optical Society, 2016)Plasmonically enhanced absorbing structures have been emerging as strong candidates for photovoltaic (PV) devices. We investigate metal-insulator-metal (MIM) structures that are suitable for tuning spectral absorption ... -
MIMIM photodetectors using plasmonically enhanced MIM absorbers
(SPIE, 2017)We demonstrate super absorbing metal-insulator-metal (MIM) stacks and MIMIM photosensitive devices operating at visible and near-infrared (VIS-NIR) spectrum, where absorbing (top) MIM and photocollecting (bottom) MIM can ... -
A near-infrared range photodetector based on indium nitride nanocrystals obtained through laser ablation
(IEEE, 2014)We present a proof-of-concept photodetector that is sensitive in the near-infrared (NIR) range based on InN nanocrystals. Indium nitride nanocrystals (InN-NCs) are obtained through laser ablation of a high pressure chemical ... -
A new approach to search result clustering and labeling
(Springer, Berlin, Heidelberg, 2011)Search engines present query results as a long ordered list of web snippets divided into several pages. Post-processing of retrieval results for easier access of desired information is an important research problem. In ... -
Novel optical antenna designs of comb shaped split ring architecture for NIR and MIR enhanced field localization
(IEEE, 2014)We demonstrated NIR/MIR resonance behavior in optical antennas of comb-shaped split-ring resonators enabling substantially larger field enhancements than single/array of dipoles with the same side length, despite their ... -
Optically thin composite resonant absorber at the near-infrared band: A polarization independent and spectrally broadband configuration
(Optical Society of American (OSA), 2011)We designed, fabricated, and experimentally characterized thin absorbers utilizing both electrical and magnetic impedance matching at the near-infrared regime. The absorbers consist of four main layers: a metal back plate, ... -
Plasmonic gratings for enhanced near infrared sensitivity of Silicon based Schottky photodetectors
(IEEE, 2011)Schottky photodetectors have been intensively investigated due to their high speeds, low device capacitances, and sensitivity in telecommunication standard bands, in the 0.8μm to 1.5μm wavelength range. Due to extreme cost ... -
Postdeposition annealing on RF-sputtered SrTiO3 thin films
(AVS Science and Technology Society, 2017)Understanding of structural, optical, and electrical properties of thin films are very important for a reliable device performance. In the present work, the effect of postdeposition annealing on stoichiometric SrTiO3 (STO) ... -
Range estimation using simple infrared sensors without prior knowledge of surface parameters
(IEEE, 2004)This paper describes a new method for range estimation using low-cost infrared sensors. The intensity data obtained with infrared sensors depends highly on the surface properties and the configuration of the sensors and ... -
Remote-controlled release of singlet oxygen by the plasmonic heating of endoperoxide-modified gold nanorods: towards a paradigm change in photodynamic therapy
(Wiley-VCH Verlag, 2016)The photodynamic therapy of cancer is contingent upon the sustained generation of singlet oxygen in the tumor region. However, tumors of the most metastatic cancer types develop a region of severe hypoxia, which puts them ... -
A robust system for counting people using an infrared sensor and a camera
(Elsevier BV, 2015)In this paper, a multi-modal solution to the people counting problem in a given area is described. The multi-modal system consists of a differential pyro-electric infrared (PIR) sensor and a camera. Faces in the surveillance ... -
Ultra-low-cost near-infrared photodetectors on silicon
(SPIE, 2015-02)We demonstrate Silicon-only near-infrared (NIR) photodetectors (sensitive up to 2000 nm) that meet large-scale ultralow-cost fabrication requirements. For the detection of infrared photons, we use metal nanoislands that ...
