Tapering effects in a 2D guided-wave photonic band gap extended microcavity

Ciminelli, Caterina; Peluso, F.; Rue, R.M. De La; Armenise, Mario Nicola

doi:10.1109/wfopc.2005.1462099

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…4. Numerical results calculated by using Bloch-Floquet method were demonstrated to be in very good agreement with the experimental results obtained by using a TE-polarized laser beam generated by a tuneable source in a range between 1.4800 and 1.5800 µm (Ciminelli et al 2004). Nevertheless, some devices, such as lasers, see the excitation source inside the cavity.…”

Section: Numerical Resultssupporting

confidence: 72%

“…The model had been already validated through a numerical comparison with results obtained by Bloch-Floquet and FDTD techniques for the investigation of a Fabry-Peròt cavity, designed to work as a filter (Ciminelli et al 2004). The cavity is made of two 2D-PhC mirrors of air holes in silicon, whose refractive index is equal to 3.48 at 1.5500 µm.…”

Section: Numerical Resultsmentioning

confidence: 99%

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Investigation of a point-like and plane-wave excitation in 2D photonic bandgap microcavities using Green’s function method

2009

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We report on a new model for simulating wave propagation in two-dimensional photonic crystals (PhCs) by means of Green's functions rearranged to fit on the geometrical and physical properties of the structure under investigation. The model can take into account physical effects occurring when the PhC is excited by either a point-like source, for the analysis of extended crystals with line and point defects, or a plane wave coming from infinite, to investigate mirrors and microlenses. The model has been used for studying a Fabry-Peròt cavity to evaluate its response in presence of a Hankel source or a plane wave excitation. A parametric investigation of the filter response as a function of the cavity length has been carried out and the best conditions to obtain an increase of quality factor of each resonant cavity mode have been determined.

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Section: Numerical Resultssupporting

confidence: 72%

Section: Numerical Resultsmentioning

confidence: 99%

Investigation of a point-like and plane-wave excitation in 2D photonic bandgap microcavities using Green’s function method

2009

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“…105,106 Even higher trapping efficiency has been demonstrated with photonic crystal (PhC) cavities, exploiting their remarkable enhancement of the Q/V figure of merit. This advantage justifies the widespread use of such cavities in several applications, such as biosensing and chemical sensing, [107][108][109][110] optical communication systems 111 and, obviously, optical trapping. 52 Different configurations of PhC cavities have been proposed to trap and manipulate particles at the micro-and nanoscale with low values of input power.…”

Section: Optical Dielectric Resonatorsmentioning

confidence: 99%

Photonic and Plasmonic Nanotweezing of Nano- and Microscale Particles

et al. 2017

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The ability to manipulate and sense biological molecules is important in many life science domains, such as single-molecule biophysics, the development of new drugs and cancer detection. Although the manipulation of biological matter at the nanoscale continues to be a challenge, several types of nanotweezers based on different technologies have recently been demonstrated to address this challenge. In particular, photonic and plasmonic nanotweezers are attracting a strong research effort especially because they are efficient and stable, they offer fast response time, and avoid any direct physical contact with the target object to be trapped, thus preventing its disruption or damage. In this paper, we critically review photonic and plasmonic resonant technologies for biomolecule trapping, manipulation, and sensing at the nanoscale, with a special emphasis on hybrid photonic/plasmonic nanodevices allowing a very strong light-matter interaction. The state-of-the-art of competing technologies, e.g., electronic, magnetic, acoustic and carbon nanotube-based nanotweezers, and a description of their applications are also included.

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“…In [34] we already reported on the tapering effects when the size of the holes in the two outer rows of each four-row reflector is changed as in Fig. (1a).…”

Section: Numerical Resultsmentioning

confidence: 99%

High Coupling Efficiency in 2D Guided-Wave Photonic Band Gap Extended Microcavities for Sensing Applications

Ciminelli¹,

Rue²,

Armenise

2008

CAC

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Label-free techniques for sensing are of great interest for identification of molecules on a functional surface. Currently, a growing research activity dealing with optical approaches does contribute to the development of new devices.A remarkable advance in the field of bio-detection is given by the use of photonic crystals enabling to design and fabricate high-sensitivity and compact novel optical sensors. Many photonic crystal sensors on several different materials have been proposed in literature. However, further improvement of the sensitivity requires an additional research effort on the optimization of both the design and fabrication process.In this paper we report on the solution of the mode-mismatch occurring at the input and output interfaces of the microcavity. Mode-mismatch is responsible for the increase of the scattering and degradation of transmission characteristics of the photonic crystal. Optimization of the sensor design can be achieved by using an appropriate tapering of some hole rows into reflectors.Numerical results have proved that two physical effects occur simultaneously, i.e. conventional tapering which is dominant at high resonant wavelengths, and resonant conditions of the external cavity, when the radius of the holes in the external row is greater than that of the internal one. This last effect is more clear at low wavelength.

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Tapering effects in a 2D guided-wave photonic band gap extended microcavity

Cited by 6 publications

References 14 publications

Investigation of a point-like and plane-wave excitation in 2D photonic bandgap microcavities using Green’s function method

Investigation of a point-like and plane-wave excitation in 2D photonic bandgap microcavities using Green’s function method

Photonic and Plasmonic Nanotweezing of Nano- and Microscale Particles

High Coupling Efficiency in 2D Guided-Wave Photonic Band Gap Extended Microcavities for Sensing Applications

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