Recent Advances in Nanophotonics - Fundamentals and Applications最新文献

Principles and Applications of Nanoplasmonics in Biological and Chemical Sensing: A Review 纳米等离子体在生物和化学传感中的原理和应用综述

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-06-30 DOI: 10.5772/intechopen.93001

P. A. Sohi, M. Kahrizi

{"title":"Principles and Applications of Nanoplasmonics in Biological and Chemical Sensing: A Review","authors":"P. A. Sohi, M. Kahrizi","doi":"10.5772/intechopen.93001","DOIUrl":"https://doi.org/10.5772/intechopen.93001","url":null,"abstract":"Biosensing requires a highly sensitive real-time detection of the biomolecules. These properties are granted by nanoplasmonic sensing techniques. SPR-based optical sensors have evolved as a sensitive and versatile biosensing tool. A growing number of SPR-based sensing applications in the solution of clinical problems are reported in the recent years. This refers to the point that these sensors provide label-free detection of the living cells and non-destructive analysis techniques. In this study, we will review the mechanism of the detection in SPR biosensing, followed by the methods used to develop sensors to detect gases and the chemical, biological, and molecular interaction. The device sensitivity improvement based on plasmonic effects is also addressed in this study, and accordingly, the size and material dependence of the resonance frequency are discussed. The reviewed articles are categorized into three groups, depending on the SPR excitation configuration. In the first group of the sensors, the sensitivity of LSPR-based sensors in prism coupler configurations is reviewed. The second group, SPR excitation by optical fiber, slightly improved the sensitivity of the detections. The unique capability of the third group, photonic crystal fiber SPR sensors, in providing greatly improved sensitivity, generated a vast field of researches and applications in biosensing devices.","PeriodicalId":425081,"journal":{"name":"Recent Advances in Nanophotonics - Fundamentals and Applications","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123552327","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: 3

Toward On-Demand Generation of Entangled Photon Pairs with a Quantum Dot 用量子点按需产生纠缠光子对的研究

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-05-25 DOI: 10.5772/intechopen.91814

A. Ahmadi, A. Fognini, M. Reimer

引用次数: 1

Surface-Enhanced Raman Scattering: Introduction and Applications 表面增强拉曼散射:介绍与应用

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-05-21 DOI: 10.5772/intechopen.92614

Samir Kumar, Prabhat Kumar, Anamika Das, Chandra Shakher Pathak

{"title":"Surface-Enhanced Raman Scattering: Introduction and Applications","authors":"Samir Kumar, Prabhat Kumar, Anamika Das, Chandra Shakher Pathak","doi":"10.5772/intechopen.92614","DOIUrl":"https://doi.org/10.5772/intechopen.92614","url":null,"abstract":"Scattering of light by molecules can be elastic, Rayleigh scattering, or inelastic, Raman scattering. In the elastic scattering, the photon’s energy and the state of the molecule after the scattering events are unchanged. Hence, Rayleigh scattered light does not contain much information on the structure of molecular states. In inelastic scattering, the frequency of monochromatic light changes upon interaction with the vibrational states, or modes, of a molecule. With the advancement in the laser sources, better and compact spectrometers, detectors, and optics Raman spectroscopy have developed as a highly sensitive technique to probe structural details of a complex molecular structure. However, the low scattering cross section (10−31) of Raman scattering has limited the applications of the conventional Raman spectroscopy. With the discovery of surface-enhanced Raman scattering (SERS) in 1973 by Martin Fleischmann, the interest of the research community in Raman spectroscopy as an analytical method has been revived. This chapter aims to familiarize the readers with the basics of Raman scattering phenomenon and SERS. This chapter will also discuss the latest developments in the SERS and its applications in various fields.","PeriodicalId":425081,"journal":{"name":"Recent Advances in Nanophotonics - Fundamentals and Applications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126359364","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: 20

Development and Characterization of High-Quality HfO2/InGaAs MOS Interface 高质量HfO2/InGaAs MOS接口的开发与表征

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-05-17 DOI: 10.5772/intechopen.92424

S. Eom, M. Kong, K. Seo

{"title":"Development and Characterization of High-Quality HfO2/InGaAs MOS Interface","authors":"S. Eom, M. Kong, K. Seo","doi":"10.5772/intechopen.92424","DOIUrl":"https://doi.org/10.5772/intechopen.92424","url":null,"abstract":"The scope of this chapter is to introduce a highly efficient HfO2 atomic layer deposition (ALD) process with superior interface defect characteristics that can be applied on high-mobility III-V substrates. For a long time, the major academic research of III-V metal-oxide-semiconductor (MOS) studies was mainly oriented on searching for the suitable high-k dielectric, and among the reported high-k/III-V MOS studies, Al2O3 and AlN have demonstrated the most promising results. However, usually, the dielectrics with higher dielectric constant suffered from more defective interface quality including the HfO2, which should be overcome to meet the intensive operation voltage scaling requirements. In order to protect the interface of the HfO2/III-V MOS, the exposed III-V surface has to be carefully treated before, while, and after the whole high-k deposition process. For this purpose, the effect of isopropyl alcohol precursor and in situ cyclic nitrogen plasma treatment on the HfO2 ALD process at III-V substrates was thoroughly investigated. Remarkable interface state density levels with strong inversion behavior were achieved, which have not been observed at the previous HfO2/InGaAs studies. Also, detailed analysis of the interface characteristics was investigated to broaden the understanding of the improvement phenomenon.","PeriodicalId":425081,"journal":{"name":"Recent Advances in Nanophotonics - Fundamentals and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128800269","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: 1

Diffusion and Quantum Well Intermixing 扩散和量子阱混合

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-05-11 DOI: 10.5772/intechopen.92440

T. Tabbakh

引用次数: 1

Interactions of Positrons and Electrons with Hydrogenic Systems, Excitation, Resonances, and Photoabsorption in Two-Electron Systems 正电子和电子与氢系统的相互作用，激发，共振和双电子系统的光吸收

Recent Advances in Nanophotonics - Fundamentals and Applications Pub Date : 2020-04-06 DOI: 10.5772/intechopen.91763

A. Bhatia

{"title":"Interactions of Positrons and Electrons with Hydrogenic Systems, Excitation, Resonances, and Photoabsorption in Two-Electron Systems","authors":"A. Bhatia","doi":"10.5772/intechopen.91763","DOIUrl":"https://doi.org/10.5772/intechopen.91763","url":null,"abstract":"There are a number of approaches to study interactions of positrons and electrons with hydrogenic targets. Among the most commonly used are the method of polarized orbital, the close-coupling approximation, and the R-matrix formulation. The last two approaches take into account the short-range and long-range correlations. The method of polarized orbital takes into account only long-range correlations but is not variationally correct. This method has recently been modified to take into account both types of correlations and is variationally correct. It has been applied to calculate phase shifts of scattering from hydrogenic systems like H, He+, and Li2+. The phase shifts obtained using this method have lower bounds to the exact phase shifts and agree with those obtained using other approaches. This approach has also been applied to calculate resonance parameters in two-electron systems obtaining results which agree with those obtained using the Feshbach projection-operator formalism. Furthermore this method has been employed to calculate photodetachment and photoionization of two-electron systems, obtaining very accurate cross sections which agree with the experimental results. Photodetachment cross sections are particularly useful in the study of the opacity of the sun. Recently, excitation of the atomic hydrogen by electron impact and also by positron impact has been studied by this method.","PeriodicalId":425081,"journal":{"name":"Recent Advances in Nanophotonics - Fundamentals and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126811863","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