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您的检索式：作者名="Lorenzo Faraone"
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| 1 | Ultrathin tunable terahertz absorber based on MEMS-driven metamaterial显示文摘The realization of high-performance tunable absorbers for terahertz frequencies is crucial for advancing applications such as single-pixel imaging and spectroscopy.Based on the strong position sensitivity of metamaterials’electromagnetic response,we combine meta-atoms that support strongly localized modes with suspended flat membranes that can be driven electrostatically.This design maximizes the tunability range for small mechanical displacements of the membranes.We employ a micro-electromechanical system technology and successfully fabricate the devices.Our prototype devices are among the best-performing tunable THz absorbers demonstrated to date,with an ultrathin device thickness(~1/50 of the working wavelength),absorption varying between 60%and 80%in the initial state when the membranes remain suspended,and fast switching speed(~27μs).The absorption is tuned by an applied voltage,with the most marked results achieved when the structure reaches the snap-down state.In this case,the resonance shifts by >200% of the linewidth(14% of the initial resonance frequency),and the absolute absorption modulation measured at the initial resonance can reach 65%.The demonstrated approach can be further optimized and extended to benefit numerous applications in THz technology. | Mingkai Liu Mohamad Susli Dilusha Silva Gino Putrino Hemendra Kala Shuting Fan Michael Cole Lorenzo Faraone Vincent P.Wallace Willie J.Padilla David A.Powell Ilya V.Shadrivov Mariusz Martyniuk | 2017 | Microsystems & Nanoengineering2017，3，1： | 2 |
| 2 | Large area van der Waals epitaxy of II-VI CdSe thin films for flexible optoelectronics and full-color imaging显示文摘The demand for future semiconductor devices with enhanced performance and lower cost has driven the development of epitaxial growth of high quality,free-standing semiconductor thin film materials without the requirement of lattice matching to the substrate,as well as their transfer to other substrates and associated device processing technology.This work presents a study on the van der Waals epitaxy based molecular beam epitaxy of CdSe thin films on two-dimensional layered mica substrates,as well as related etch-free layer transfer technology of large area,free-standing layers and their application in flexible photodetectors for full-color imaging.The photoconductor detectors based on these flexible CdSe thin films demonstrate excellent device performance at room temperature in terms of responsivity(0.2 A·W^(-1))and detectivity(1.5×10^(12)Jones),leading to excellent full-color imaging quality in the visible spectral range.An etch-free and damage-free layer transfer method has been developed for transferring these CdSe thin films from mica to other substrate for further device processing and integration.These results demonstrate the feasibility of van der Waals epitaxy method for growing high quality,large area,and free-standing epitaxial layers without the requirement for lattice matching to substrate for applications in low-cost flexible and/or monolithic integrated optoelectronic devices. | Wenwu Pan Junliang Liu Zekai Zhang Renjie Gu Alexandra Suvorova Sarah Gain Han Wang Ziyuan Li Lan Fu Lorenzo Faraone Wen Lei | 2022 | Nano Research2022，15，1： | 1 |
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