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| 1 | Infrared upconversion imaging in nonlinear metasurfaces显示文摘Infrared imaging is a crucial technique in a multitude of applications,including night vision,autonomous vehicle navigation,optical tomography,and food quality control.Conventional infrared imaging technologies,however,require the use of materials such as narrow bandgap semiconductors,which are sensitive to thermal noise and often require cryogenic cooling.We demonstrate a compact all-optical alternative to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas,using a nonlinear wave-mixing process.We experimentally show the upconversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency generation.In this process,an infrared image of a target is mixed inside the metasurface with a strong pump beam,translating the image from the infrared to the visible in a nanoscale ultrathin imaging device.Our results open up new opportunities for the development of compact infrared imaging devices with applications in infrared vision and life sciences. | Rocio Camacho-Morales Davide Rocco Lei Xu Valerio Flavio Gili Nikolay Dimitrov Lyubomir Stoyanov Zhonghua Ma Andrei Komar Mykhaylo Lysevych Fouad Karouta Alexander Dreischuh Hark Hoe Tan Giuseppe Leo Costantino De Angelis Chennupati Jagadish Andrey E.Miroshnichenko Mohsen Rahmani Dragomir N.Neshev | 2021 | Advanced Photonics2021，3，3： | 11 |
| 2 | The Character and Formation of Elongated Depressions on the Upper Bulgarian Slope显示文摘Seafloor elongated depressions are indicators of gas seepage or slope instability. Here we report a sequence of slopeparallel elongated depressions that link to headwalls of sediment slides on upper slope. The depressions of about 250 m in width and several kilometers in length are areas of focused gas discharge indicated by bubble-release into the water column and methane enriched pore waters. Sparker seismic profiles running perpendicular and parallel to the coast, show gas migration pathways and trapped gas underneath these depressions with bright spots and seismic blanking. The data indicate that upward gas migration is the initial reason for fracturing sedimentary layers. In the top sediment where two young stages of landslides can be detected, the slopeparallel sediment weakening lengthens and deepens the surficial fractures, creating the elongated depressions in the seafloor supported by sediment erosion due to slope-parallel water currents. | XU Cuiling GREINERT Jens HAECKEL Matthias BIALAS Jorg DIMITROV Lyubomir ZHAO Guangtao | 2018 | Journal of Ocean University of China2018，17，3： | 2 |
| 3 | Why are Some People Happy than Other?--The Role of Cognitive Motivational Processes in WellBeing显示文摘 | Sonja Lyubomirs | 2001 | American Psychology2001，56，3： | 1 |
| 4 | A comparative study of transformation functions for nonrigid Image registration显示文摘 | Lyubomir Z Ardeshir G | 2006 | IEEE Transactions on Image Processing2006，15，3： | 1 |
| 5 | Non-isothermal kinetics of thermal degradation of chitosan显示文摘 | Velyana Georgieva Dilyana Zvezdova Lyubomir Vlaev | 2012 | Chemistry Central Journal2012，，1： | 1 |
| 6 | In Vivo Activation of the P53 Pathway by Small-Molecule Antagonists of Mdm2 显示文摘 | Lyubomir T Vassilev | 2004 | Science2004，303，： | 1 |
| 7 | Kinetics and thermodynamics of water adsorption onto rice husks ash filled polypropene composites during soaking显示文摘 | Lyubomir Vlaev Sevdalina Turmanova Antonia Dimitrova | 2009 | Journal of Polymer Research2009，，2： | 1 |
| 8 | Lyudmil nakovantichlamydial and antisperm antibodies in patients with chlamydial infections显示文摘 | Dimitrina D Svetoslav K Lyubomir H | 2004 | American Journal of Reproductive Immunology A JRI2004，52，： | 1 |
| 9 | In vivo activation of the p53 pathway by small- molecule antagonists of mdm2 显示文摘 | Vassilev Lyubomir T Vu Binh T Graves Bradford | 2004 | Science2004，303，5659： | 1 |
| 10 | The glucocorticoid-activating enzyme 11β-hydroxysteroid dehydrogenase type 1 has broad substrate specificity: Physiological and toxicological considerations显示文摘 | Alex Odermatt Lyubomir G. Nashev | 2010 | Journal of Steroid Biochemistry and Molecular Biology2010，，1： | 1 |
| 11 | A comparative study of transformation functions for nonrigid image registration 显示文摘 | Lyubomir Z Ardeshir G | 2006 | IEEE Transactions on Image Processing2006，15，3： | 1 |
| 12 | In vivo activation of the p53 pathway by small-molecule antagonists of MDM2 显示文摘 | Lyubomir T Vassilev BT Bradford G | 2004 | Science2004，303，： | 1 |
| 13 | Why are some people happy than other? - The role of cognitive motivational processes in Well-being 显示文摘 | Sonja Lyubomirs | 2001 | American Psychology2001，56，3： | 1 |
| 14 | Syphilis: uncommon presentations in adults显示文摘 | Lyubomir A Dourmishev M Assen L | 2005 | Clinics in Dermatology2005，23，： | 1 |
| 15 | Clinical variants, stages, and management of basal cell carcinoma显示文摘 | Lyubomir AD Darena R Ivan B | 2013 | Indian Dermatol Online2013，4，1： | 1 |
| 16 | In Vivo Activation of the P53 Pathway by Small-Molecule Antagonists of Mdm2 显示文摘 | Lyubomir T Vassilev | 2004 | Science2004，303，： | 1 |
| 17 | The glucocorticoid-activating enzyme 11β-hydroxysteroid dehydrogenase type 1 has broad substrate specificity: Physiological and toxicological considerations显示文摘 | Alex Odermatt Lyubomir G. Nashev | 2010 | Journal of Steroid Biochemistry and Molecular Biology2010，，1： | 1 |
| 18 | Why are Some People Happy Than Other? -The Role of Cognitive Motivational Processes in Well-Being显示文摘 | Sonja Lyubomirs | 2001 | American Psychology2001，56，3： | 1 |
| 19 | Applications of time series analysis in epidemiology: Literature review and our experience during COVID-19 pandemic显示文摘Time series analysis is a valuable tool in epidemiology that complements the classical epidemiological models in two different ways:Prediction and forecast.Prediction is related to explaining past and current data based on various internal and external influences that may or may not have a causative role.Forecasting is an exploration of the possible future values based on the predictive ability of the model and hypothesized future values of the external and/or internal influences.The time series analysis approach has the advantage of being easier to use(in the cases of more straightforward and linear models such as Auto-Regressive Integrated Moving Average).Still,it is limited in forecasting time,unlike the classical models such as Susceptible-Exposed-Infectious-Removed.Its applicability in forecasting comes from its better accuracy for short-term prediction.In its basic form,it does not assume much theoretical knowledge of the mechanisms of spreading and mutating pathogens or the reaction of people and regulatory structures(governments,companies,etc.).Instead,it estimates from the data directly.Its predictive ability allows testing hypotheses for different factors that positively or negatively contribute to the pandemic spread;be it school closures,emerging variants,etc.It can be used in mortality or hospital risk estimation from new cases,seroprevalence studies,assessing properties of emerging variants,and estimating excess mortality and its relationship with a pandemic. | Latchezar Tomov Lyubomir Chervenkov Dimitrina Georgieva Miteva Hristiana Batselova TsvetelinaVelikova | 2023 | World Journal of Clinical Cases2023，11，29： | 0 |
| 20 | 舞动之美显示文摘舞动之美/LyubomirSergeev,保加利亚摄影师,在这组作品中,他将人体与时尚完美融合,以镜头捕捉舞者们的靓影。她们摊动着,轻盈的步伐跃然而起,优美的身体化作一串奇异的音符,融汇成一曲华丽的乐章。 | Lyubomir Sergeev | 2014 | 现代青年2014，，4： | 0 |
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