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We present a novel irradiation sensor based on a fluorescent microparticle that is optically guided inside the core of a liquid-filled photonic crystal fiber. We demonstrate irradiance measurements with spatial resolution of ∼10 μm.
Hollow-core photonic crystal fibre (HC-PCF) offers several advantages for photochemical applications. These include minimal sample consumption (4 nL/cm in the core), very long interaction lengths, almost full overlap between the sample and the light [1-4]. A further advantage for photochemistry is that the easily accessible hollow channels allow surface-functionalization of the inner walls. Here we...
We present the first room-temperature results on a three-photon excitation of Rydberg states in cesium atoms placed inside a kagomé-style hollow-core photonic crystal fiber.
Dielectric microparticles optically propelled along an air-filled hollow-core PCF come to a halt just before an absorbing mark on the fiber coating, when radiation pressure is opposed by an equal and opposite thermophoretic force.
Hollow-core photonic crystal fiber offers new possibilities for sensing and photochemistry applications. In this paper we review our recent achievements on liquid-phase photochemical microreactors using photonic crystal fibers and discuss our future prospects in this field.
Hollow-core photonic crystal fiber (HC-PCF) with all its hollow channels (core and cladding holes) liquid-filled can support photonic band gap guidance of a single mode [1]. Recently we have demonstrated that such liquid-filled HC-PCFs can be used to guide and propel micro-spheres over long (10s of cms) and flexible pathways [2]. The speed of optically-guided particles depends on the balance between...
Hollow-core photonic crystal fiber (HC-PCF) offers several advantages for chemical analysis, for example, long optical pathlengths, sub-µL sample volumes, close to 100% overlap between light and sample, and more compact systems for sensing [1–2] and photochemistry [3–4]. Here we compare the performance of a conventional cuvette-based UV-VIS system for monitoring of catalytic reactions with a system...
Soft glasses such as oxides, fluorides and chalcogenides offer higher nonlinearity, larger refractive indices, and extended transmission windows compared to silica [1]. Combined with the unique ability of solid-core photonic crystal fibre (PCF) to control dispersion, soft glasses have enabled low power supercontinuum (SC) generation in tellurite- [2] and lead-silicate glass PCFs [3–4].
Photonic crystal fiber (PCF) greatly enhances light-matter interactions at path lengths much longer than those in conventional sample cells. The overlap between guided modes and fluid samples introduced into the hollow channels in PCF permits quantitative absorption spectroscopy with small (<1 µL) sample volumes [1–2]. Recently, enhanced fluorescence detection was demonstrated in index-guiding...
We report the successful transport of spatially entangled qutrits through a photonic crystal fiber. We test entanglement in two 2D subspaces; in one of them we show violation of a Bell inequality.
A nanoscale hole placed centrally in the core of a PCF breaks the degeneracy between radially and azimuthally polarized modes, causing a large splitting in phase velocity, group velocity and dispersion.
Keeping light tightly guided, over metre-long distances, in both nanoscale solid glass cores and hollow cores allows enhanced and highly reproducible control of linear and nonlinear interactions between light, acoustic vibrations and trapped particles.
We demonstrate direct-coupling of vertical-cavity surface-emitting lasers to suspended-core PCFs and present characterization of this gas sensor. The spectral background and power-overlap from 763-2004 nm are measured to determine the quantitative detection sensitivity.
We report a sensitive evanescent field sensor using air-suspended solid-core fibers. Excellent agreement between measured and calculated mode profiles allows us to measure quantitative broadband absorption spectra with sample volumes as low as 1 μL.
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