JEOS:RP - Journal of the European Optical Society Rapid publications
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Concealment by uniform motion
Get PDFThe perceived lateral position of a transmitted beam, upon propagating through a slab made of homogeneous, isotropic, dielectric material at an oblique angle, can be controlled through varying the velocity of the slab. In particular, by judiciously selecting the slab velocity, the transmitted beam can emerge from the slab with no lateral shift in position. Thereby, a degree of concealment can be achieved. This concealment is explored in numerical calculations based on a 2D Gaussian beam
Numerical analysis of a slit-groove diffraction problem
Get PDFWe present a comparison among several fully-vectorial methods applied to a basic scattering problem governed by the physics of the electromagnetic interaction between subwavelength apertures in a metal film. The modelled structure represents a slit-groove scattering problem in a silver film deposited on a glass substrate. The benchmarked methods, all of which use in-house developed software, include a broad range of fully-vectorial approaches from finite-element methods, volume-integral methods, and finite-difference time domain methods, to various types of modal methods based on different expansion techniques
Welcome to a new electronic journal
Get PDFIn 2005, the Board of the European Optical Society (EOS) decided to launch a fully electronic international online journal because it felt that the scientific community in general and the EOS-membership in particular would greatly profit from such a new service. After more than a half year of preparatory work, the journal JEOS Rapid Publications (JEOS:RP) is now online (http://www.jeos.org) and ready to accept submissions from a broad field in optics and photonics. The Editor in Chief of the journal, Mario Bertolotti, his deputy Peter Török and the Editorial Board are determined to maintain a high scientific level from the very beginning. At the same time, the turn-around time of a submitted paper will be kept as short as possible to justify the epitheton ‘Rapid Publications’. With a well-organized reviewing system, this time between submission and final publication should not exceed three weeks maximum.
I would like to bring some particularities of JEOS:RP to your attention. First of all, in contrast to most other journals, the copyright of the published paper remains with the author. This is in line with European law that favours the rights of authors. The only requirement of JEOS:RP is the consent of the author not to publish the paper in another journal, book or other publication means within the first twelve months after publication in JEOS:RP. This is also the only step in the submission and publication process that is not fully electronic. European law requires a written document in which the author signs for this temporary limitation of his full copyright; in practice, a downloadable fax form signed by the author and sent to the EOS office is sufficient. A second point I would like to bring to your attention is the author fee system. For an open-access journal like JEOS:RP, a fee from the author is indispensable to cover the cost of editing the journal. The European Optical Society has been able to fix this fee at a very low level. The basic fee is 400 €; full members and branch members of EOS receive a discount of 50 €. The length of a submitted paper does not play a role. We are convinced that this author fee level is very interesting and we will do our utmost to stick to this competitive level in coming years. A third point of interest, especially for the authors from academia, is the presence of JEOS:RP in the ISI Master Journal List established by Thomson Scientific. All necessary steps have been taken by the Editors to introduce JEOS:RP on this list. Like for all new journals, this insertion will be official after two years of existence of the journal with effectiveness in retrospect from the starting date of the journal (June 2006)
The brilliant future of the online journal is now in the hands of you, the authors, via the quality of your submissions to JEOS:RP. The Editorial Board will do its utmost to establish a very high standard by a thorough and efficient reviewing system carried out by an international network of peers. The aspect of publication speed will be primordial but it should be clear that in certain circumstances quality can not be sacrificed to the shortest possible turn-around time of the paper. Having said this, the Editors, Editorial Board and the other officials of EOS committed to JEOS:RP welcome your future submissions to the online journal
Highly dispersive photonic band-gap-edge optofluidic biosensors
Get PDFHighly dispersive photonic band-gap-edge optofluidic biosensors are studied theoretically. We demonstrate that these structures are
strongly sensitive to the refractive index of the liquid, which is
used to tune dispersion of the photonic crystal. The upper frequency band-gap edge shifts about 1.8~nm for , which is quite sensitive. Results from transmission spectra agree well with those obtained from the band structure theory
Temporal Lau effect: Noncoherent regeneration of periodic pulse trains
Get PDFWe present an optical method for implementing the temporal Talbot effect with a spectrally incoherent optical source and a linear dispersive medium, at the first-order dispersion regime. We state the condition for achieving this effect, here denoted as the temporal Lau effect
Talbot bands and temporal processing of optical signals
Get PDFTalbot’s bands can be observed in one of the diffraction orders of a grating spectrometer with a partially phase-shifted input beam. This experiment has long been considered as a curiosity. Here, we look at it from a new perspective: we discuss the Talbot band experiment as a combination of two kinds of dispersion, refractive and diffractive. This may be of interest for various tasks of temporal optical signal processing such as dispersion management and the shaping of ps/fs-pulses. For this purpose, we demonstrate the use of micromachined optical elements to alter the performance of the classical Talbot band setup. A theoretical description and experimental results are presented
Influence of the Raman depolarisation ratio on far-field radiation patterns in coherent anti-Stokes Raman scattering (CARS) microscopy
Get PDFWe propose a full-vectorial numerical study of far-field radiation patterns in coherent anti-Stokes Raman scattering(CARS) microscopy. We emphasis the particular role of the Raman depolarization ratio of the observed medium and show how it modifies the radiation pattern of thin objects
Interference or not: analysis of Young's experiment for a single-cylce pulse
Get PDFAn analysis of Young’s interference experiment for single cycle pulses showing the time evolution of the interference pattern due to two square apertures is obtained in the Fresnel regime. The fact that the diffraction pattern from each aperture is not constant in time has consequences on the interference pattern. We have also analyzed the changes in the spectrum at different regions at the observation plane. This position-dependent spectrum results in frequency beating of the interference pattern for the case of two apertures
Liquid-infiltrated photonic crystals: Ohmic dissipation and broadening of modes
Get PDFThe pronounced light-matter interactions in photonic crystals make them interesting as opto-fludic "building blocks" for lab-on-a-chip applications. We show how conducting electrolytes cause dissipation and smearing of the density-of-states, thus altering decay dynamics of excited bio-molecules dissolved in the electrolyte. Likewise, we find spatial damping of propagating modes, of the order dB/cm, for naturally occurring electrolytes such as drinking water or physiological salt water
Fabrication and characterization of low-loss polymeric waveguides and micro-resonators
Get PDFWe realize low loss, single-mode polymer waveguides and microring resonators in SU-8 (MichroChem) using direct E-beam lithography. We also present and demonstrate a novel and simple approach for accurately extracting the propagation loss in the waveguides as well as the coupling between the waveguide and the microring. The demonstrated approach is insensitive to the I/O coupling efficiency to the optical chip and does not require any pre-calibration of the experimental setup