Publications
233 results found
Pusch A, Yoshida M, Hylton NP, et al., 2016, The Purpose of a Photon Ratchet in Intermediate Band Solar Cells, 43rd IEEE Photovoltaic Specialists Conference (PVSC), Publisher: IEEE, Pages: 9-12, ISSN: 0160-8371
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- Citations: 2
Pusch A, Oh S, Wuestner S, et al., 2015, A highly efficient CMOS nanoplasmonic crystal enhanced slow-wave thermal emitter improves infrared gas-sensing devices, Scientific Reports, Vol: 5, ISSN: 2045-2322
The application of plasmonics to thermal emitters is generally assisted by absorptive losses in the metal because Kirchhoff’s law prescribes that only good absorbers make good thermal emitters. Based on a designed plasmonic crystal and exploiting a slow-wave lattice resonance and spontaneous thermal plasmon emission, we engineer a tungsten-based thermal emitter, fabricated in an industrial CMOS process, and demonstrate its markedly improved practical use in a prototype non-dispersive infrared (NDIR) gas-sensing device. We show that the emission intensity of the thermal emitter at the CO2 absorption wavelength is enhanced almost 4-fold compared to a standard non-plasmonic emitter, which enables a proportionate increase in the signal-to-noise ratio of the CO2 gas sensor.
Amrania H, Shousha S, Woodley L, et al., 2015, Digistain: A novel biomarker imaging platform for grading breast carcinoma using routinely processed paraffin sections, Publisher: SPRINGER, Pages: S13-S13, ISSN: 0945-6317
Amrania H, Shousha S, Woodley L, et al., 2015, Digistain: a novel biomarker imaging platform for grading breast carcinoma using routinely processed paraffin sections, 27th European Congress of Pathology (ECP 2015), Publisher: Springer Verlag, Pages: S13-S13, ISSN: 0945-6317
Objective: Digistain is a new technology platform that enables imagingand quantification of a newly conceived biomarker for grading breastcarcinoma in routinely processed, unstained paraffin sections withoutthe use of traditional stains or contrasting agents. By recording a uniqueoptical signature to analyze the chemical make-up of a biopsy quantitatively, the technique is unaffected by the subjectivity of traditional grading. Within minutes of loading a slide it yields a highly reproducible and user independent numerical score reflecting the cellularity of the tumour and its nuclear: cytoplasmic ratio. We report here our findings using an objective technique to grade breast tumours using quantitative criteria.Method: H&E stained sections from excision biopsies of 105 cases ofinvasive breast carcinoma were reviewed and graded using the ElstonEllisgrading system. Unstained sections from each case were loaded intothe Digistain platform to yield a numerical score - the Digistain Index(DI).Results: The cases were grouped according to histological grading. MeanDIs was calculated for each grade (1,2 and 3) to be 0.56, 0.61, and 0.68respectively with a maximum standard error of 0.02. The DI spread withineach grade was less than that across the three grades, thus validatingthis index as a viable grading indicator within the context of this study.Conclusion: We believe the new Digistain approach provides for the firsttime a cost effective and quantitative measure of tumour grade. This canbe developed to deliver an effective assessment of prognosis and recurrence risk beyond traditional qualitative measures based on H&E staining protocols.
Okada Y, Ekins-Daukes NJ, Kita T, et al., 2015, Intermediate band solar cells: Recent progress and future directions, Applied Physics Reviews, Vol: 2, ISSN: 1931-9401
Murphy FJ, Arbabzadah EA, Bak AO, et al., 2015, Optical chopper Q-switching for flashlamp-pumped Er,Cr:YSGG lasers, Laser Physics Letters, Vol: 12, ISSN: 1612-202X
Amrania H, Drummond L, Woodley L, et al., 2014, Digistain: A new objective method for grading breast carcinoma using routinely processed paraffin sections, VIRCHOWS ARCHIV, Vol: 465, Pages: S91-S92, ISSN: 0945-6317
Shammah N, Phillips CC, De Liberato S, 2014, Terahertz emission from asymmetric, doped quantum wells under resonant pumping, 6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications (ICOOPMA), Publisher: IOP Publishing, ISSN: 1742-6588
Shammah N, Phillips CC, De Liberato S, 2014, Terahertz emission from ac Stark-split asymmetric intersubband transitions, PHYSICAL REVIEW B, Vol: 89, ISSN: 2469-9950
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- Citations: 14
Murphy FJ, Bak AO, Matthews M, et al., 2014, Linewidth-narrowing phenomena with intersubband cavity polaritons, PHYSICAL REVIEW B, Vol: 89, ISSN: 1098-0121
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- Citations: 6
Yoshida M, Amrania H, Farrell DJ, et al., 2014, Progress Toward Realizing an Intermediate Band Solar Cell-Sequential Absorption of Photons in a Quantum Well Solar Cell, IEEE JOURNAL OF PHOTOVOLTAICS, Vol: 4, Pages: 634-638, ISSN: 2156-3381
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- Citations: 11
Bak AO, Giannini V, Maier SA, et al., 2013, Super-resolution with a positive epsilon multi-quantum-well super-lens, APPLIED PHYSICS LETTERS, Vol: 103, ISSN: 0003-6951
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- Citations: 4
Murphy FJ, Amrania H, Phillips CC, 2013, Widely tunable midinfrared radiation from GaSe OPO
Discussed is a mid IR, gallium selenide, angle-tuned, singly resonant OPO with a tuning range of λ ~ 4-18 μm, pumped by a λ = 2.8 μm Er, Cr: YSGG Q-switched laser. The system will achieve anticipated pulse energies of up to 1 mJ. © OSA 2013.
Rahmani M, Yoxall E, Hopkins B, et al., 2013, Plasmonic Nanoclusters with Rotational Symmetry: Polarization-Invariant Far-Field Response vs Changing Near-Field Distribution, ACS NANO, Vol: 7, Pages: 11138-11146, ISSN: 1936-0851
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- Citations: 45
Yoxall E, Navarro-Cia M, Rahmani M, et al., 2013, Widely tuneable scattering-type scanning near-field optical microscopy using pulsed quantum cascade lasers, APPLIED PHYSICS LETTERS, Vol: 103, ISSN: 0003-6951
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- Citations: 19
De Liberato S, Ciuti C, Phillips CC, 2013, Terahertz lasing from intersubband polariton-polariton scattering in asymmetric quantum wells, PHYSICAL REVIEW B, Vol: 87, ISSN: 2469-9950
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- Citations: 42
Arbabzadah EA, Phillips CC, Damzen MJ, 2013, Free-running and Q-switched operation of a diode pumped Er:YSGG laser at the 3 μm transition, APPLIED PHYSICS B-LASERS AND OPTICS, Vol: 111, Pages: 333-339, ISSN: 0946-2171
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- Citations: 17
De Liberato S, Ciuti C, Phillips CC, 2013, Inter-branch terahertz lasing in asymmetric intersubband polariton systems, 31st International Conference on the Physics of Semiconductors (ICPS), Publisher: AMER INST PHYSICS, Pages: 459-+, ISSN: 0094-243X
Yang KY, Giannini V, Bak AO, et al., 2012, Subwavelength imaging with quantum metamaterials, PHYSICAL REVIEW B, Vol: 86, ISSN: 1098-0121
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- Citations: 19
Yoshida M, Ekins-Daukes NJ, Farrell DJ, et al., 2012, Photon ratchet intermediate band solar cells, Applied Physics Letters, Vol: 100, ISSN: 1077-3118
In this paper, we propose an innovative concept for solar power conversion—the “photon ratchet” intermediate band solar cell (IBSC)—which may increase the photovoltaicenergy conversion efficiency of IBSCs by increasing the lifetime of charge carriers in the intermediate state. The limiting efficiency calculation for this concept shows that the efficiency can be increased by introducing a fast thermal transition of carriers into a non-emissive state. At 1 sun, the introduction of a “ratchet band” results in an increase of efficiency from 46.8% to 48.5%, due to suppression of entropy generation.
Amrania H, Antonacci G, Chan C-H, et al., 2012, Digistain: a digital staining instrument for histopathology, OPTICS EXPRESS, Vol: 20, Pages: 7290-7299, ISSN: 1094-4087
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- Citations: 25
Arbabzadah E, Chard S, Amrania H, et al., 2011, Comparison of a diode pumped Er:YSGG and Er:YAG laser in the bounce geometry at the 3 μm transition, OPTICS EXPRESS, Vol: 19, Pages: 25860-25865, ISSN: 1094-4087
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- Citations: 56
Arbabzadah EA, Chard SP, Amrania H, et al., 2011, High energy diode pumped Er:YSGG laser at 3m transition
Lasing of the trivalent erbium ion in garnet hosts at wavelengths close to 3m has attracted considerable interest. This is primarily due to the strong absorption by water around this wavelength, making erbium doped lasers suitable for use in a range of medical and biological applications [1-3]. A variety of erbium doped hosts have been investigated to date, of which Er:YAG has been the most intensively researched. However, Er:YSGG shows promise for the construction of a more efficient laser system owing to its longer upper laser level lifetime of 1.3ms compared with 0.12ms in Er:YAG [1]. In this work we report operation of a quasi continuous wave (QCW) diode pumped 30 at. % Er:YSGG laser in the bounce geometry, yielding pulse energies of up to 41mJ and a slope efficiency of 12.6%. © 2011 IEEE.
Giannini V, Francescato Y, Amrania H, et al., 2011, Fano Resonances in Nanoscale Plasmonic Systems: A Parameter-Free Modeling Approach, NANO LETTERS, Vol: 11, Pages: 2835-2840, ISSN: 1530-6984
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- Citations: 279
Amrania H, McCrow AP, Matthews MR, et al., 2011, Ultrafast infrared chemical imaging of live cells, CHEMICAL SCIENCE, Vol: 2, Pages: 107-111, ISSN: 2041-6520
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- Citations: 22
Gambari J, Fernandez-Dominguez AI, Maier SA, et al., 2010, Thresholdless coherent light scattering from subband polaritons in a strongly coupled microcavity, PHYSICAL REVIEW B, Vol: 82, ISSN: 1098-0121
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- Citations: 4
Amrania H, McCrow A, Phillips C, 2009, A benchtop, ultrafast infrared spectroscopic imaging system for biomedical applications, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 80, ISSN: 0034-6748
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- Citations: 6
Nogaret A, Portal J-C, Beere HE, et al., 2009, Quantum interference of magnetic edge channels activated by intersubband optical transitions in magnetically confined quantum wires, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 21, ISSN: 0953-8984
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- Citations: 4
Nogaret A, Portal JC, Beere HE, et al., 2009, Microwave Induced Forward Scattering in a Multi-channel Magnetically Confined Quantum Wire, 29th International Conference on Physics of Semiconductors, Publisher: AMER INST PHYSICS, Pages: 345-+, ISSN: 0094-243X
Steed RJ, Frogley MD, Matthews M, et al., 2008, Angular momentum kinetics in intersubband transitions in semiconductor quantum wells, PHYSICAL REVIEW B, Vol: 78, ISSN: 1098-0121
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- Citations: 1
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