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Doped GaSe crystals for laser frequency conversion

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Light(Science & Applications) 2015年第1期4卷 47-58页

作者： Jin Guo Ji-Jiang Xie Dian-Jun Li Gui-Long Yang Fei Chen Chun-Rui Wang Lai-Ming Zhang Yury M Andreev Konstantin A Kokh gregory v.lanskii valery A Svetlichnyi State Key Laboratory of Laser Interaction with Matter Changchun Institute of OpticsFine Mechanics and PhysicsCASChangchun 130033China Innovation Laboratory of Electro-Optical Countermeasures Technology Changchun Institute of OpticsFine Mechanics and PhysicsCASChangchun 130033China Laboratory of GeosphereBiosphere Interactions Institute of Monitoring of Climatic and Ecological SystemsSB RASTomsk 634055Russia Laboratory of Advanced Materials and Technologies Siberian Physical-Technical Institute of Tomsk State UniversityTomsk 634050Russia Crystal Growth Laboratory Institute of Geology and MineralogySB RASNovosibirsk 630090Russia Novosibirsk State University Novosibirsk 630090Russia

In this review,we introduce the current state of the art of the growth technology of pure,lightly doped,and heavily doped(solid solution)nonlinear gallium selenide(GaSe)crystals that are able to generate broadband emission from the near infrared(IR)(0.8 mm)through the mid-and far-IR(terahertz(THz))ranges and further into the millimeter wave(5.64 mm)*** the first time,we show that appropriate doping is an efficient method controlling a range of the physical properties of GaSe crystals that are responsible for frequency conversion efficiency and exploitation *** appropriate doping,uniform crystals grown by a modified technology with heat field rotation possess up to 3 times lower absorption coefficient in the main transparency window and THz ***,doping provides the following benefits:raises by up to 5 times the optical damage threshold;almost eliminates two-photon absorption;allows for dispersion control in the THz range independent of the mid-IR dispersion;and enables crystal processing in arbitrary directions due to the strengthened ***,doped GaSe demonstrated better usefulness for processing compared with GaSe grown by the conventional technology and up to 15 times higher frequency conversion efficiency.

关键词： frequency conversion GaSe solid solution crystal THz

All-optical switching in silicon photonic waveguides with an epsilon-near-zero resonant cavity [Invited]

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Photonics Research 2018年第5期6卷 I0026-I0030页

作者： ANDRES D.NEIRA gregory A.WURTZ ANATOLY v.ZAYATS Department of Physics King's College London

Strong nonlinearity of plasmonic metamaterials can be designed near their effective plasma frequency in the epsilon-near-zero(ENZ) regime. We explore the realization of an all-optical modulator based on the Au nonlinearity using an ENZ cavity formed by a few Au nanorods inside a Si photonic waveguide. The resulting modulator has robust performance with a modulation depth of about 30 dB/μm and loss less than 0.8 dB for switching energies below 600 fJ. The modulator provides a double advantage of high mode transmission and strong nonlinearity enhancement in the few-nanorod-based design.

关键词： All-optical switching silicon photonic waveguides an epsilon-near-zero resonant cavity

Gastric neuroendocrine neoplasms type 1: A systematic review and meta-analysis

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World Journal of Gastroenterology 2019年第35期25卷 5376-5387页

作者： Apostolos v Tsolakis Athanasia Ragkousi Miroslav vujasinovic gregory Kaltsas Kosmas Daskalakis Department of Oncology and Pathology Karolinska Institute Stockholm 17177 Sweden Cancer Centre Karolinska CCK Karolinska University Hospital Stockholm 17176 Sweden 1st Department of Propaupedic Internal Medicine Endocrine Oncology Unit Laiko Hospital National and Kapodistrian University of Athens Athens 11527 Greece Department of Digestive Diseases Karolinska University Hospital Stockholm 14186 Sweden Department of Surgical Sciences Uppsala University Uppsala 75185 Sweden

BACKGROUND To date, the histopathological parameters predicting the risk of lymph node (LN) metastases and local recurrence, associated mortality and appropriateness of endoscopic or surgical resection in patients with gastric neuroendocrine neoplasms type 1 (GNENs1) have not been fully elucidated. AIM To determine the rate of LN metastases and its impact in survival in patients with GNEN1 in relation to certain clinico-pathological parameters. METHODS The PubMed, EMBASE, Cochrane Library, Web of Science and Scopus databases were searched through January 2019. The quality of the included studies and risk of bias were assessed using the Newcastle-Ottawa Scale (NOS) in accordance with the Cochrane guidelines. A random effects model and pooled odds ratios (OR) with 95%CI were applied for the quantitative meta-analysis. RESULTS We screened 2933 articles. Thirteen studies with 769 unique patients with GNEN1 were included. Overall, the rate of metastasis to locoregional LNs was 3.3%(25/769). The rate of LN metastases with a cut-off size of 10 mm was 15.3% for lesions > 10 mm (vs 0.8% for lesions vasion of the muscularis propria was identified as a predictor for LN metastases (OR: 17.2;95%CI: 1.8-161.1;heterogeneity: P = 0.165;I2 = 44.5%), whereas grade was not clearly associated with LN metastases (OR: 2;95%CI: 0.3-11.6;heterogeneity: P = 0.304;I2 = 17.4%). With regard to GNEN1 local recurrence, scarce data were available. The 5-year disease-specific survival for patients with and without LN metastases was 100% in most available studies irrespective of the type of intervention. Surgical resection was linked to a lower risk of recurrence (OR: 0.3;95%CI: 0.1-1.1;heterogeneity: P = 0.173;I2 = 31.9%). The reported complication rates of endoscopic and surgical intervention were 0.6 and 3.8%, respectively. CONCLUSION This meta-analysis confirms that tumor size ≥ 10 mm and invasio

关键词： Gastric neuroendocrine neoplasms type 1 Meta-analysis Lymph node metastasis Tumor size Invasion Endoscopy Surgery

Generalization of the optical theorem: experimental proof for radially polarized beams

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Light(Science & Applications) 2018年第1期7卷 708-717页

作者： Alexey v.Krasavin Paulina Segovia Rostyslav Dubrovka Nicolas Olivier gregory A.Wurtz Pavel Ginzburg Anatoly v.Zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK Department of Electronic Engineering Queen Mary University of LondonLondonUK School of Electrical Engineering Tel Aviv UniversityRamat AvivTel Aviv 69978Israel ITMO University St.Petersburg 197101Russia Departamento de Optica CICESECarretera Ensenada-Tijuana 391822860 EnsenadaMexico Laboratory for Optics&Biosciences Ecole PolytechniqueCNRS UMR 7645F-91128 PalaiseauFrance Department of Physics University of North FloridaJacksonville FL 32224USA

The optical theorem,which is a consequence of the energy conservation in scattering processes,directly relates the forward scattering amplitude to the extinction cross-section of the *** derived for planar scalar waves,it neglects the complex structure of the focused beams and the vectorial nature of the electromagnetic *** the other hand,radially or azimuthally polarized fields and various vortex beams,essential in modern photonic technologies,possess a prominent vectorial field ***,we experimentally demonstrate a complete violation of the commonly used form of the optical theorem for radially polarized beams at both visible and microwave *** show that a plasmonic particle illuminated by such a beam exhibits strong extinction,while the scattering in the forward direction is *** generalized formulation of the optical theorem provides agreement with the observed *** reported effect is vital for the understanding and design of the interaction of complex vector beams carrying longitudinal field components with subwavelength objects important in imaging,communications,nanoparticle manipulation,and detection,as well as metrology.

关键词： structure. field. theorem

Sulfidized Nanoscale Zero-valent Iron:Tuning the Properties of ThisComplex Material for Efficient Groundwater Remediation

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Accounts of Materials Research 2021年第6期2卷 420-431页

作者： Jiang Xu Hao Li gregory v.Lowry College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China Department of Physics Technical University of Denmark2800 Kongens LyngbyDenmark Department of Civil and Environmental Engineering Carnegie Mellon UniversityPittsburghPennsylvania 15213United States

CONSPECTUS:Groundwater contamination by halogenated organic compounds,especially chlorinated and fluorinated ones,threatens freshwater sources *** zero-valent iron(NZvI)has been extensively studied(>5000 publications)and deployed for in situ groundwater remediation,but NZvI selectivity for contaminants is poor,reactive lifetimes are short,and it cannot promote defluorination ***,sulfidized NZvI(SNZvI)has emerged,and has revitalized academic and industrial interests in this material for *** broadens the range of reactive contaminants,and significantly increases the selectivity and reactive lifetime of NZvI by 2 orders of magnitude,while inhibiting the undesirable H2 evolution reaction between Fe0 and *** Account provides a state-of-the-art understanding of the chemical properties controlling the reactivity and selectivity of SNZvI and will advance the field toward the rational design of efficient groundwater remediation *** is a complex mixture of reactive body-centered cubic(BCC)metallic iron and unspecified iron *** published SNZvI research has aimed at exploring the breadth of its reactivity toward various environmental contaminants rather than understanding the factors that influence the reactivity of this complex mixture of *** works from our laboratory have aimed at tuning the synthesis conditions to control the amount and speciation of sulfur in the SNZvI structure,and elucidating how these structural changes result in physicochemical properties(e.g.,hydrophobicity,electron-transfer resistance,and H adsorption sites)that provide desirable reactivity and selectivity for important groundwater *** Account explains the reasons for the more desirable properties of SNZvI compared to *** degradation pathways,and reactive sites(Fe or S sites)and species(direct electron transfer or atomic H)of SNZvI for the dechlorination of trichloroethene and defluorination

关键词： groundwater dating desirable

CO激光在非线性晶体ZnGeP_2和GaSe中的混频效应(英文)

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光学精密工程 2012年第2期20卷 277-286页

作者：张来明谢冀江郭劲陈飞姜可 ANDREEv YU M IONIN A A KINYAEvSKIY I O KLIMACHEv YU M KOZLOv A YU KOTKOv A A lanskii G v SHAIDUKO A v 中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室吉林长春130033 俄罗斯科学院西伯利亚分院气候与生态系统监测研究所托木斯克俄罗斯634055 俄罗斯科学院列别捷夫物理所俄罗斯莫斯科119991

为了获得2.15～1 500μm的相干光源,研究了CO激光在高质量非线性晶体ZnGeP2和GaSe中的混频效应。为了提高转换效率,在激光锁模方式下对CO激光器的二次谐波、和频和差频的产生进行了研究。结果显示,利用GaSe晶体和ZnGeP2晶体,调Q多谱线C... 详细信息

为了获得2.15～1 500μm的相干光源,研究了CO激光在高质量非线性晶体ZnGeP2和GaSe中的混频效应。为了提高转换效率,在激光锁模方式下对CO激光器的二次谐波、和频和差频的产生进行了研究。结果显示,利用GaSe晶体和ZnGeP2晶体,调Q多谱线CO激光辐射的谱线内倍频效率分别大于0.3%和1.1%。采用ZnGeP2晶体进行倍频时,可调谐锁膜CO激光器的转换效率为12.5%。模拟结果显示,二次谐波与和频产生的输出光谱相同。相邻谱线下,和频和差频的产生过程中,基波和一次谐波可以分别在4.0～5.0μm和100～≥1 200μm(太赫兹范围)形成振荡。利用锁模CO激光器在ZnGeP2晶体中的混频效应,可以得到2.15～≥1 500μm的相干光源,同时转换效率可达到甚至高于12.5%。

关键词：非线性晶体 ZnGeP2晶体 GaSe晶体混频效应脉冲CO激光锁模

Universal switching of plasmonic signals using optical resonator modes

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Light(Science & Applications) 2016年第1期5卷 135-142页

作者： Cillian PT McPolin Nicolas Olivier Jean-Sebastien Bouillard Daniel O’Connor Alexey v Krasavin Wayne Dickson gregory A Wurtz Anatoly v Zayats Department of Physics King’s College LondonStrandLondon WC2R 2LSUK Present address:University of Sheffield Hounsfield RoadSheffield S37RHUK Present address:University of Hull Cottingham RoadHull HU67RXUK Present address:National Physical Laboratory Hampton RoadTeddingtonMiddlesex TW110LWUK University of North Florida 1 UNF DriveJacksonvilleFL 32224USA

We propose and investigate,both experimentally and theoretically,a novel mechanism for switching and modulating plasmonic signals based on a Fano interference process,which arises from the coupling between a narrow-band optical Fabry–Pérot cavity and a surface plasmon polariton(SPP)*** SPP wave emitted from the cavity is actively modulated in the vicinity of the cavity resonances by altering the cavity Q-factor and/or resonant *** experimentally demonstrate dynamic SPP modulation both by mechanical control of the cavity length and all-optically by harnessing the ultrafast nonlinearity of the Au mirrors that form the *** electro-optical modulation scheme is also proposed and numerically *** operation of the switch via mechanical means yields a modulation in the SPP coupling efficiency of~80%,while the all-optical control provides an ultrafast modulation with an efficiency of 30%at a rate of~0.6 *** experimental observations are supported by both analytical and numerical calculations of the mechanical,all-optical and electro-optical modulation methods.

关键词： Fano resonances optical signal processing plasmonics ultrafast switching

Molecular basis of pathogenesis of emerging viruses infecting aquatic animals

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Aquaculture and Fisheries 2018年第1期3卷 1-5页

作者： Lang Gui v.gregory Chinchar Qiya Zhang College of Fisheries and Ljfe Science Shanghai Ocean University.Shanghai 201306China Department of Microbiolbgy.University of Miss tsippi Medical Center 2500 North State StreetJacksonMS 39216USA State Key Laboratory of Freshwater Ecology and Botechnology Institute of Hydrobiology.Chinese Acodemy of SciencesWuhan 430072China

Aquatic vertebrates are very abundant in the world,and they are of tremendous importance in providing global food security and ***,emergent and resurgent viruses,such as ranavirus(e.g.,Rana grylio virus,RGv and Andriasd avidianus ranavirus,ADRv),herpesvirus(e.g.,Carassius carassius herpesvirus,CaHv),reovirus(e.g.,grass carp reovirus 109,GCRv-109,Scophthal musmaximus reovirus,SMRev and Micropterus salmoides reovirus,MsRev),and rhabdovirus(e.g.,Siniper cachuatsi rhabdovirus,SCRv and Scophthal musmaximus rhabdovirus,SMRv)can cause severe diseases in aquaculture animals and wild lower vertebrates,such as frogs,giant salamanders,fish,and so ***,we will briefly describe the symptoms produced by the aforementioned viruses and the molecular basis of the virus ehost *** manuscript aims to provide an overview of viral diseases in lower vertebrates with an emphasis on visible symptomatic manifestations and pathogenesis.

关键词： Ranavirus Herpesvirus Reovirus Rhabdovirus Aquatic animal

COMPARATIvE TREATMENT OF ACNE vULGARIS USING PALOMAR LUX APPLIQU´E TECHNIQUE AND DIRECT INTRALESIONAL INJECTION

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Journal of Innovative Optical Health Sciences 2009年第3期2卷 279-287页

作者： ELINA A.GENINA ALEXEY N.BASHKATOv vALERY v.TUCHIN GEORGY v.SIMONENKO vERA N.SHERSTNEvA ILYA v.YAROSLAvSKY gregory B.ALTSHULER Department of Optics and Biophotonics Saratov State University 83 Astrakhanskaya str. Saratov 410012Russia Saratov State Medical University 112 B.Kazachya str. Saratov 410012Russia Palomar Medical Technologies Inc. 82 Cambridge St.Burlington 01803MAUSA

Intralesional injection of triamcinolone(TMC)preparations is an effective therapy for cystic acne ***,invasive delivery techniques limit the use of this modality to a relatively narrow class of *** permeability can be enhanced through creating a lattice of microzones(islets)of light-induced limited thermal damage in the upper layers of *** this paper,we directly compared safety and efficacy of delivering TMC acetonide with this novel technique versus conventional intralesional injection for treatment of inflammatory acne lesions.A combination of an intense pulsed light system and a specially designed appliqu´e with a pattern of absorbing centers has been used to create the lattice of islets of damage(LID).Quantitative analysis has included estimation of the following parameters:redness,diameter,and height of acne *** photography has been used to document dynamics of lesion development at successive visits(two hours,24 hours and one week post-treatment).Seven subjects have participated in the *** difference in lesion dynamics between the treatment and control groups was observed at two-hours *** 24-hours/one-week follow-ups,TMC-injected and TMC-LID-delivered groups have demonstrated 82%/93%and 80%/89%improvement in height of lesions in comparison to control(60%/68%).Delivery of TMC with the newly proposed LID technique is at least as effective as intralesional injection for treating inflammatory acne *** of skin permeability using LID approach is a promising technique for accelerating delivery of various compounds to their target areas in the skin.

关键词： Acne vulgaris drug delivery skin permeability enhancement.