Toward Mid-Infrared, Subdiffraction, Spectral-Mapping of Human Cells and Tissue: SNIM (Scanning Near-Field Infrared Microscopy) Tip Fabrication

Athanasiou, Giorgos S.; Ernst, Johanna; Furniss, David; Benson, T.M.; Chauhan, Jasbinder; Middleton, J.R.; Parmenter, Christopher; Fay, Michael W.; Neate, Nigel; Shiryaev, V.S.; Чурбанов, М. Ф.; Seddon, Angela B.

doi:10.1109/jlt.2015.2496786

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…Chalcogenide glass fibers is an excellent medium for nonlinear applications in the midinfrared (MIR), and offers flexible delivery and collection of broadband MIR light for fiberbased sensing applications, such as: Fiber evanescent wave spectroscopy (FEWS) [1], bundled-fiber imaging [2], scanning fiber near-field spectroscopy [3], and fiber medical endoscopy [4]. However, coupling light over a broad bandwidth to a fiber can be challenging and often leads to excessive losses.…”

Section: Introductionmentioning

confidence: 99%

Increased mid-infrared supercontinuum bandwidth and average power by tapering large-mode-area chalcogenide photonic crystal fibers

Petersen¹,

Engelsholm²,

Markos³

et al. 2017

Opt. Express

100

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The trade-off between the spectral bandwidth and average output power from chalcogenide fiber-based mid-infrared supercontinuum sources is one of the major challenges towards practical application of the technology. In this paper we address this challenge through tapering of large-mode-area chalcogenide photonic crystal fibers. Compared to previously reported step-index fiber tapers the photonic crystal fiber structure ensures single-mode propagation, which improves the beam quality and reduces losses in the taper due to higher-order mode stripping. By pumping the tapered fibers at 4 μm using a MHz optical parametric generation source, and choosing an appropriate length of the untapered fiber segments, the output could be tailored for either the broadest bandwidth from 1 to 11.5 μm with 35.4 mW average output power, or the highest output power of 57.3 mW covering a spectrum from 1 to 8 μm.

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Section: Introductionmentioning

confidence: 99%

Increased mid-infrared supercontinuum bandwidth and average power by tapering large-mode-area chalcogenide photonic crystal fibers

Petersen¹,

Engelsholm²,

Markos³

et al. 2017

Opt. Express

100

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show abstract

“…Indeed, the use of this type of glass as a chemical sensor has already been demonstrated [3][4]. It is thus possible to produce biosensors from chalcogenide fibers such as Te 20 As 30 Se 50 (TAS) glass composition that enable faster and less invasive diagnostics for infectious diseases, chronic, and cancer [5]. Their efficiency can then be monitored by tapering the fiber diameter (about 100µm).…”

Section: Introductionmentioning

confidence: 99%

Te-As-Se glass destabilization using high energy milling

Calvez

Lavanant

Anna

et al. 2018

Journal of Non-Crystalline Solids

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The Te 20 As 30 Se 50 (TAS) glass has been studied under the extreme conditions of high energy milling. Starting from the raw materials, an amorphization process occurs progressively reaching an unstable intermediate state and the final stable state then. Despite its high resistance against crystallization when made using silica tubes, an intermediate state is reached when mechanically alloyed into powder. The evolution of the glass structure has been investigated using Raman spectroscopy and MAS NMR of 77 Se according to the milling time. Optimized parameters and conditions to compact milled powders by Spark Plasma Sintering show the possibility to design infrared windows transparent from 2 to 20µm. A correlation to the thermo-mechanical properties of densified powder using hot pressing has been made.

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“…Critical for many of these applications, for example medical diagnostics, power delivery, microscopy and sensing, is the potential for low loss fibre fabrication [5][6][7][8][9][10][11][12] and hence thermal glass stability against devitrification. Many glass compositions are available, which provides the opportunity and versatility to realise glasses with a wide and continuous range of physical properties, including refractive index.…”

Section: Introductionmentioning

confidence: 99%

Characterising refractive index dispersion in chalcogenide glasses

Fang

Sójka

Jayasuriya

et al. 2016

2016 18th International Conference on Transparent Optical Networks (ICTON)

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Much effort has been devoted to the study of glasses that contain the chalcogen elements (sulfur, selenium and tellurium) for photonics' applications out to MIR wavelengths. In this paper we describe some techniques for determining the refractive index dispersion characteristics of these glasses. Knowledge of material dispersion is critical in delivering step-index fibres including with high numerical aperture for mid-infrared supercontinuum generation.

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Toward Mid-Infrared, Subdiffraction, Spectral-Mapping of Human Cells and Tissue: SNIM (Scanning Near-Field Infrared Microscopy) Tip Fabrication

Cited by 8 publications

References 17 publications

Increased mid-infrared supercontinuum bandwidth and average power by tapering large-mode-area chalcogenide photonic crystal fibers

Increased mid-infrared supercontinuum bandwidth and average power by tapering large-mode-area chalcogenide photonic crystal fibers

Te-As-Se glass destabilization using high energy milling

Characterising refractive index dispersion in chalcogenide glasses

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