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Ge-on-Si modulators operating at mid-infrared wavelengths up to 8 μm

Photonics Research 2019年第8期7卷 828-836页

作者： TIANTIAN LI MILOS NEDELJKOVIC NANNICHA HATTASAN WEI CAO ZHIBO QU CALLUM GLITTLEJOHNS jordi soler penades LORENZO MASTRONARDI VINITA MITTAL DANIEL BENEDIKOVIC DAVID JTHOMSON FREDERIC YGARDES HEQUAN WU ZHIPING ZHOU GORAN ZMASHANOVICH Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer SciencePeking UniversityBeijing100871China Silicon Technologies Centre of Excellence Nanyang Technological UniversitySingapore639798Singapore Centre de Nanosciences et de Nanotechnologies CNRSUniv.Paris-SudUniversitéParis-SaclayC2N-Palaiseau91120PalaiseauFrance

We report mid-infrared Ge-on-Si waveguide-based PIN diode modulators operating at wavelengths of 3.8 and8 μm. Fabricated 1-mm-long electro-absorption devices exhibit a modulation depth of >35 dB with a 7 V forward bias at 3.8 μm, and a similar 1-mm-long Mach–Zehnder modulator has a Vπ· L of 0.47 V · cm. Driven by a 2.5 Vpp RF signal, 60 MHz on-off keying modulation was demonstrated. Electro-absorption modulation at 8 μm was demonstrated preliminarily, with the device performance limited by large contact separation and high contact resistance.

关键词： PIN frame EAM Ge-on-Si modulators

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Towards neurotoxicity testing in the 22nd century:a vision,a taste or a smell?

Towards neurotoxicity testing in the 22nd century:a vision,a...

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Neurotoxicity and Neurodegeneration:Local Effect and Global Impact--13th International Neurotoxicology Association Meeting & 11th International Symposium on Neurobehavioral Methods and Effects in Occupational and Environmental Health

作者： jordi Llorens Carla soler-Martín Blanca Cutillas Lara Sedó Sandra Saldaa-Ruiz Departament de Ciencies Fisiologiques Ⅱ Universitat de Barcelona - IDIBELLHospitalet de LlobregatSpain

The report "Toxicity testing in the 21 century:A vision and a strategy"（NRC,US NAS）,advocates for a toxicity testing strategy that relies on high throughput in vitro tests sensitive to key effects on "toxicity pathw... 详细信息

关键词： Towards neurotoxicity testing in the 22 century:a vision,a taste or a smell

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Diagnosis and management of pericardial effusion

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World Journal of Cardiology 2011年第5期3卷 135-143页

作者： Jaume Sagristà-Sauleda Axel Sarrias Mercé jordi soler-soler Cardiology Service àrea del corACORVHUniversity Hospital Vall d'HebronPasseig Vall d'Hebron119-12908035 BarcelonaSpain

Pericardial effusion is a common finding in everyday clinical *** first challenge to the clinician is to try to establish an etiologic ***,the pericardial effusion can be easily related to a known underlying disease,such as acute myocardial infarction, cardiac surgery,end-stage renal disease or widespread metastatic *** no obvious cause is apparent,some clinical findings can be useful to establish a diagnosis of *** presence of acute inflammatory signs(chest pain,fever,pericardial friction rub) is predictive for acute idiopathic pericarditis irrespective of the size of the effusion or the presence or absence of *** effusion with absence of inflammatory signs and absence of tamponade is predictive for chronic idiopathic pericardial effusion,and tamponade without inflammatory signs for neoplastic pericardial *** considerations are very important,as in developed countries acute idiopathic pericarditis and idiopathic pericardial effusion are the most common etiologies,but in some underdeveloped geographic areas tuberculous pericarditis is the leading cause of pericardial *** second point is the evaluation of the hemodynamic compromise caused by pericardial *** tamponade is not an"all or none"phenomenon,but a syndrome with a continuum of severity ranging from an asymptomatic elevationof intrapericardial pressure detectable only through hemodynamic methods to a clinical tamponade recognized by the presence of dyspnea,tachycardia,jugular venous distension,pulsus paradoxus and in the more severe cases arterial hypotension and *** the middle,echocardiographic tamponade is recognized by the presence of cardiac chamber collapses and characteristic alterations in respiratory variations of mitral and tricuspid *** treatment of pericardial effusion is mainly dictated by the presence of inflammatory signs and by the underlying disease if *** drainage is m

关键词： Pericardial effusion Etiology Diagnosis Therapy

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