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Showing 13 to 24 of 391 entries
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Scattering at sidewall roughness in photonic crystal slabs.

Optics letters

Bogaerts W, Bienstman P, Baets R.
PMID: 12747708
Opt Lett. 2003 May 01;28(9):689-91. doi: 10.1364/ol.28.000689.

We have simulated the effect of sidewall roughness in photonic-crystallike structures with different vertical refractive-index contrast. We treated the scattering off a sidewall irregularity as a radiating dipole excited by the incident waveguide mode. We show that the loss...

Compact spot-size converters with fiber-matched antiresonant reflecting optical waveguides.

Applied optics

Galarza M, De Mesel K, Baets R, Martínez A, Aramburu C, López-Amo M.
PMID: 12952328
Appl Opt. 2003 Aug 20;42(24):4841-6. doi: 10.1364/ao.42.004841.

We propose a concept for InGaAsP-InP 1.55-microm lasers integrated with spot-size converters based on modal interference between the modes of the structure formed by an active waveguide and an underlying fiber-matched antiresonant reflecting optical waveguide. Simulation results show that...

In situ ESR/Vis/NIR spectroelectrochemistry of [60]fullerene: the origin of ESR "spikes" and the reactivity of pristine fullerene anions.

Chemphyschem : a European journal of chemical physics and physical chemistry

Rapta P, Bartl A, Gromov A, Stasko A, Dunsch L.
PMID: 12465514
Chemphyschem. 2002 Apr 15;3(4):351-6. doi: 10.1002/1439-7641(20020415)3:4<351::AID-CPHC351>3.0.CO;2-W.

No abstract available.

Apolipoprotein E levels in cerebrospinal fluid and the effects of ABCA1 polymorphisms.

Molecular neurodegeneration

Wahrle SE, Shah AR, Fagan AM, Smemo S, Kauwe JS, Grupe A, Hinrichs A, Mayo K, Jiang H, Thal LJ, Goate AM, Holtzman DM.
PMID: 17430597
Mol Neurodegener. 2007 Apr 12;2:7. doi: 10.1186/1750-1326-2-7.

BACKGROUND: Animal studies suggest that brain apolipoprotein E (apoE) levels influence amyloid-beta (Abeta) deposition and thus risk for Alzheimer's disease (AD). We have previously demonstrated that deletion of the ATP-binding cassette A1 transporter (ABCA1) in mice causes dramatic reductions...

A case of systemic mastocytosis associated with severe osteoporosis and pathologic fractures.

European journal of internal medicine

Pusl T, Kenngott S, Bartl R, Baur A, Ludolph-Hauser D, Juengst D.
PMID: 15668093
Eur J Intern Med. 2004 Dec;15(8):537-539. doi: 10.1016/j.ejim.2004.11.003.

We describe the case of a 56-year-old man with rapidly progressive osteoporosis culminating in pathologic fractures of multiple lumbar vertebrae. With the exception of discrete brown-reddish cutaneous lesions, low back pain was the only prominent symptom. Laboratory evaluations excluded...

Genetic recombination: genetic, physical, and biochemical aspects.

Science (New York, N.Y.)

Skalka A, Weissbach A, Bartl P.
PMID: 17789228
Science. 1974 Mar 22;183(4130):1218-9. doi: 10.1126/science.183.4130.1218.

No abstract available.

Ultralow-loss 3-dB photonic crystal waveguide splitter.

Optics letters

Frandsen LH, Borel PI, Zhuang YX, Harpøth A, Thorhauge M, Kristensen M, Bogaerts W, Dumon P, Baets R, Wiaux V, Wouters J, Beckx S.
PMID: 15309839
Opt Lett. 2004 Jul 15;29(14):1623-5. doi: 10.1364/ol.29.001623.

A photonic crystal waveguide splitter that exhibits ultralow-loss 3-dB splitting for TE-polarized light is fabricated in silicon-on-insulator material by use of deep UV lithography. The high performance is achieved by use of a Y junction, which is designed to...

High efficiency Silicon-on-Insulator grating coupler based on a poly-Silicon overlay.

Optics express

Roelkens G, Van Thourhout D, Baets R.
PMID: 19529582
Opt Express. 2006 Nov 27;14(24):11622-30. doi: 10.1364/oe.14.011622.

A high efficiency broadband grating coupler for Silicon-On-Insulator waveguides was designed. The grating coupler is defined by locally adding a poly-Silicon layer on top of the existing waveguide layer structure prior to grating etching. Adding this poly-Silicon layer reshapes...

Optical near-field study of photonic crystal tapers.

Applied optics

Néel D, Benyattou T, Sanchis P, Martí J, Bogaerts W, Dumon P, Baets R.
PMID: 19844306
Appl Opt. 2009 Oct 20;48(30):5718-21. doi: 10.1364/AO.48.005718.

A scanning near-field optical microscopy study is undertaken on photonic crystal tapers. These tapers are used to couple a 3 microm wide multimode dielectric waveguide to a single-line defect monomode photonic crystal waveguide. Two kinds of taper, with or...

III-V/silicon-on-Insulator nanophotonic cavities for optical network-on-chip.

Journal of nanoscience and nanotechnology

Liu L, Roelkens G, Van Campenhout J, Brouckaert J, Van Thourhout D, Baets R.
PMID: 20355536
J Nanosci Nanotechnol. 2010 Mar;10(3):1461-72. doi: 10.1166/jnn.2010.2032.

We review some opto-electronic devices based on the III-V/SOI heterogeneous integration platform, including lasers, modulators, wavelength converters, and photo-detectors. All of them are critical components for future on-chip interconnect and optical network-on-chip. The footprints of such devices are kept...

Prevalence and etiology of vertigo in adult rural population.

Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India

Abrol R, Nehru VI, Venkatramana Y.
PMID: 23119748
Indian J Otolaryngol Head Neck Surg. 2001 Jan;53(1):32-6. doi: 10.1007/BF02910976.

A survey on 10.000 adults between the age of 20 and 79 years out of a total population of 66.186 persons in rural settlements under the inrisduction of Union Territory of Chandigarh between June 1993 to June 1995 was...

Photonics: an ultra-small silicon laser.

Nature

Baets R.
PMID: 23803844
Nature. 2013 Jun 27;498(7455):447-8. doi: 10.1038/498447a.

No abstract available.

Showing 13 to 24 of 391 entries