Results 131 to 140 of about 70,198,860 (309)

High-speed electrooptical VOA integrated in silicon-on-insulator

open access: yes, 2003
In this paper, we present simulation results of an electrooptical variable optical attenuator (VOA) inte-grated in silicon-on-insulator waveguide. The device is functionally based on free carriers absorption toachieve attenuation. Beam propagation method
Liu Zhongli   +3 more
core  

Tamper‐Responsive Physical Unclonable Functions via Graphene‐Interlayered Block Copolymer Random Structures

open access: yesAdvanced Materials, EarlyView.
Self‐invalidating multilayer physical unclonable functions (PUFs) integrate fingerprint‐like metal nanopattern bilayers from block copolymer templates with highly reactive reduced graphene oxide (rGO) interlayers. This tamper‐responsive architecture blocks all unauthorized physical and chemical replication attempts while autonomously deactivating ...
Gyu Hui Jo   +7 more
wiley   +1 more source

A Concept of an Integral Optical Pressure Sensor

open access: yesПриборы и методы измерений
Today, an expanding application of automatic systems demands research and development of novel types of sensors suitable for special conditions. Specifically, microelectromechanical pressure sensors are among of the most widely implemented devices.
E. S. Barbin   +5 more
doaj   +1 more source

2 x 2 electrooptical switch in silicon-on-insulator waveguide

open access: yes, 2003
A 2 x 2 Mach-Zehnder interferometer electrooptical switch integrated in silicon-on-insulator using multimode interference 3-dB couplers as splitter and combiner has been proposed and fabricated.
Yan QF Chinese Acad Sci Inst Semicond State Key Lab Integrated Optoelect Beijing 100083 Peoples R China.   +6 more
core  

Sub‐nm2 Ferroelectric Domains via Charged 180° Walls in ZrO2

open access: yesAdvanced Materials, EarlyView.
Ferroelectric ZrO2${\rm ZrO}_2$ thin films host closely spaced charged 180∘$^{\circ }$ domain walls that vertically compress polar domains beyond their lateral half‐unit‐cell limit. These head‐to‐head and tail‐to‐tail walls show distinct bulk‐like structures, natural oxygen‐mediated stabilization, and highly asymmetric mobility, highlighting new ...
Nashrah Afroze   +33 more
wiley   +1 more source

Enhanced Drive Current in 10 nm Channel Length Gate-All-Around Field-Effect Transistor Using Ultrathin Strained Si/SiGe Channel

open access: yesMicromachines
The continuous scaling down of MOSFETs is one of the present trends in semiconductor devices to increase device performance. Nevertheless, with scaling down beyond 22 nm technology, the performance of even the newer nanodevices with multi-gate ...
Potaraju Yugender   +5 more
doaj   +1 more source

Silicon Photonics Beyond the Silicon-on-Insulator Platform (Invited)

open access: yes, 2015
The silicon-on-insulator platform has several shortcomings for near- and mid-infrared integrated photonics. Heterogeneous platforms that integrate silicon with lithium niobate, tantalum pentoxide, chalcogenide glass and silicon nitride, as well as all ...
Fathpour, Sasan, Sasan Fathpour
core   +1 more source

Ferrocene‐Based Self‐Assembled Monolayers Enable Ultra‐High Specific Detectivity in Perovskite Photodetectors

open access: yesAdvanced Materials, EarlyView.
We report perovskite photodetectors with record specific detectivities exceeding 1013 Jones with a novel molecular design strategy to functionalize self‐assembled monolayers (SAMs) with ferrocene (Fc) derivatives. Fc‐SAM‐based devices also exhibit strong operational stability and enable data transmission rates exceeding 1 Mbps in a LiFi system ...
Edoardo Angela   +10 more
wiley   +1 more source

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