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1064 nm laser-induced defects in pure SiO<sub>2</sub> fibers
We investigate evidence of the formation of nonbridging oxygen hole centers in pure silica photonic crystal fibers from 5 ps 1064 nm pulses. The formation of the defects is attributed to the breaking of stressed silicon-oxygen...
1064 nm laser-induced defects in pure SiO<sub>2</sub> fibers
We investigate evidence of the formation of nonbridging oxygen hole centers in pure silica photonic crystal fibers from 5 ps 1064 nm pulses. The formation of the defects is attributed to the breaking of stressed silicon-oxygen...
1064 nm Dispersive Raman Microspectroscopy and Optical Trapping of Pharmaceutical Aerosols.
Raman spectroscopy is a powerful tool for investigating chemical composition. Coupling Raman spectroscopy with optical microscopy (Raman microspectroscopy) and optical trapping (Raman tweezers) allows microscopic length scales...
Ultrashort pulse compression and delivery in a hollow-core photonic crystal fiber at 540 nm wavelength
Peter James Mosley, W C Huang, Matthew G Welch, Brian J Mangan, William J Wadsworth, Jonathan C Knight
Nov 01, 2010
We have fabricated a bandgap-guiding hollow-core photonic crystal fiber (PCF) capable of transmitting and compressing ultrashort pulses in the green spectral region around 532 nm. When propagating subpicosecond pulses through 1...
Ultrashort pulse compression and delivery in a hollow-core photonic crystal fiber at 540 nm wavelength
Peter James Mosley, W C Huang, Matthew G Welch, Brian J Mangan, William J Wadsworth, Jonathan C Knight
Nov 01, 2010
We have fabricated a bandgap-guiding hollow-core photonic crystal fiber (PCF) capable of transmitting and compressing ultrashort pulses in the green spectral region around 532 nm. When propagating subpicosecond pulses through 1...
A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm.
Daniel G Congrave, Bluebell H Drummond, Patrick J Conaghan, Haydn Francis, Saul TE Jones, Clare P Grey, Neil C Greenham, Dan Credgington, Hugo Bronstein
Nov 04, 2019
Harnessing the near-infrared (NIR) region of the electromagnetic spectrum is exceedingly important for photovoltaics, telecommunications, and the biomedical sciences. While thermally activated delayed fluorescent (TADF)...
Electrons and holes in a 40 nm thick silicon slab at cryogenic temperatures
We demonstrate low temperature operation of an electron-hole bilayer device based on a 40 nm thick layer of silicon in which electrons and holes can be simultaneously induced and contacted independently. The device allows the...
Electrons and holes in a 40 nm thick silicon slab at cryogenic temperatures
We demonstrate low temperature operation of an electron-hole bilayer device based on a 40 nm thick layer of silicon in which electrons and holes can be simultaneously induced and contacted independently. The device allows the...
Monitoring prisons in England and Wales
NM Padfield
Jan 16, 2017
It is difficult to say whether prison life is ‘well’ supervised by judicial and other legal authorities in England and Wales. This article explores a number of important bodies which all have a role in monitoring what goes on in...
Continuous manufacturing of silver nanoparticles between 5 and 80 nm with rapid online optical size and shape evaluation
Flexible manufacturing technology of nanoparticles with sizes between 5 and 80 nm. This unique size flexibility is enabled by coupling rapid online spectroscopy and a mathematical Mie theory-based algorithm for size and shape...
Unfolding the contents of sub-nm plasmonic gaps using normalising plasmon resonance spectroscopy.
Bart de Nijs, Richard W Bowman, Lars O Herrmann, Felix Benz, Steve J Barrow, Jan Mertens, Daniel O Sigle, Rohit Chikkaraddy, Anna Eiden, Andrea Ferrari, Oren A Scherman, Jeremy J Baumberg
Aug 02, 2019
Plasmonic coupling of gold nanoparticles to a gold surface creates intense plasmonic hot spots with large electromagnetic field-enhancements within the cavity formed by the two metallic surfaces. The localised field in such...
A quantum light-emitting diode for the standard telecom window around 1,550 nm.
T Müller, J Skiba-Szymanska, AB Krysa, J Huwer, M Felle, M Anderson, RM Stevenson, J Heffernan, DA Ritchie, AJ Shields
Oct 03, 2018
Single photons and entangled photon pairs are a key resource of many quantum secure communication and quantum computation protocols, and non-Poissonian sources emitting in the low-loss wavelength region around 1,550 nm are...
N-over-N cascode push–pull modulator driver in 130 nm CMOS enabling 20 Gbit/s optical interconnection with Mach-Zehnder modulator
The N-over-N cascode push-pull modulator driver is demonstrated at 20 Gbit/s with IBM 130 nm technology. Electro-optical measurement of the modulator driver integrated with a Mach-Zehnder modulator (MZM) is also presented. This...
Intermittency between avalanche regimes on grain piles.
We experimentally investigate discrete avalanches of grains, driven by a low inflow rate, on an erodible pile in a channel. We observe intermittency between one regime, in which avalanches are quasiperiodic and system spanning...
Metaphysics, science, and religion
NM Deng
Jan 04, 2017
I found this book interesting and rewarding, as well as a real pleasure to read. It’s a sustained defense of a rather provocative thesis, using original arguments in metaphysics, epistemology, the philosophy of time, space...
Coarsening Dynamics of 2D Subaqueous Dunes
Abstract: Fluid flow over an initially flat granular bed leads to the formation of a surface‐wave instability. The sediment bed profile coarsens and increases in amplitude and wavelength as disturbances develop from ripples into...
N-over-N cascode push–pull modulator driver in 130 nm CMOS enabling 20 Gbit/s optical interconnection with Mach-Zehnder modulator
The N-over-N cascode push-pull modulator driver is demonstrated at 20 Gbit/s with IBM 130 nm technology. Electro-optical measurement of the modulator driver integrated with a Mach-Zehnder modulator (MZM) is also presented. This...
Giant mid-IR resonant coupling to molecular vibrations in sub-nm gaps of plasmonic multilayer metafilms.
Rakesh Arul, David-Benjamin Grys, Rohit Chikkaraddy, Niclas S Mueller, Angelos Xomalis, Ermanno Miele, Tijmen G Euser, Jeremy J Baumberg
Sep 23, 2022
Nanomaterials capable of confining light are desirable for enhancing spectroscopies such as Raman scattering, infrared absorption, and nonlinear optical processes. Plasmonic superlattices have shown the ability to host...
Broadband 200-nm second-harmonic generation in silicon in the telecom band.
Silicon is well known for its strong third-order optical nonlinearity, exhibiting efficient supercontinuum and four-wave mixing processes. A strong second-order effect that is naturally inhibited in silicon can also be observed...
Giant mid-IR resonant coupling to molecular vibrations in sub-nm gaps of
plasmonic multilayer metafilms
Rakesh Arul, David Benjamin-Grys, Rohit Chikkaraddy, Niclas S Mueller, Angelos Xomalis, Ermanno Miele, Tijmen G Euser, Jeremy J Baumberg
Oct 24, 2022
Nanomaterials capable of confining light are desirable for enhancing
spectroscopies such as Raman scattering, infrared absorption, and nonlinear
optical processes. Plasmonic superlattices have shown the ability to...
Screening Λ in a new modified gravity model
Abstract
We study a new model of Energy-Momentum Squared Gravity (EMSG), called Energy-Momentum Log Gravity (EMLG), constructed by the addition of the term...
Force fluctuations at the transition from quasi-static to inertial granular flow.
We analyse the rheology of gravity-driven, dry granular flows in experiments where individual forces within the flow bulk are measured. We release photoelastic discs at the top of an incline to create a quasi-static erodible bed...
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