Optimize design super collimation in square lattice two-dimensional photonic crystals

Xu, Quan; Xie, Kai; Yang, Huajun

doi:10.1016/j.ijleo.2009.02.027

Cited by 2 publications

(4 citation statements)

References 12 publications

(10 reference statements)

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“…TE (TM) polarization refers to the case when the electric (magnetic) field is in the plane of periodicity and the magnetic (electric) field is parallel to the scatterers. A comprehensive study on a square lattice PC reveals that the self‐collimating band for the TE polarization is higher than the band for the TM mode in a unique hole‐type PC with the same index ratios and fill factor, which is in good agreement with the prior findings on this subject . Sensitivity to polarization in PCs originates from a non‐zero fill factor and can be explained by the band theory.…”

Section: Polarization Insensitive Scsupporting

confidence: 84%

“…Another FOM to determine the efficiency of SC was introduced in which measures the maximum flatness half width (MFHW) as a flatness measure of the EFC. By the aforementioned FOM, the minimum allowed size of the beam to be collimated is achieved, however, beating patterns may arise due to small curvatures of the proposed EFCs for SC.…”

Section: Fundamentals Of Self‐collimationmentioning

confidence: 99%

“…PCs are periodic arrays of inhomogeneous dielectric materials first introduced by Yablonovitch and John in 1987 . PCs are promising structures for optical integration; however, the first challenge in PC‐based structures is to control the routing of light . Planar PCs, which are thin slabs patterned in 2D lattices of holes or rods, have been proven to be a suitable backbone for optical integration since their fabrication is compatible with conventional microelectronic methods .…”

Section: Introductionmentioning

confidence: 99%

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Self‐Collimation in Photonic Crystals: Applications and Opportunities

2017

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A comprehensive review considering recent advances in self-collimation and its applications in optical integration is covered in the current article. Self-collimation is compared to the conventional technique of photonic bandgap engineering to control the light propagation in photonic crystal-based structures. It is fully discussed how the self-collimation phenomenon can be tailored to be independent of the incident angle and polarization. This adds substantial flexibility to the structure to overcome light coupling challenges and simultaneously aids in the omission of bulk and challenging elements, including polarizers and lenses from optical integrated circuits. Additionally, designed structures have the potential to be rescaled to operate in any desired frequency range thanks to the scalability rule in the field of electromagnetics. Moreover, it is shown that one can boost the coupling efficiency by applying an anti-reflection property to the structure, which provides not only efficient index matching but also the matching between external waves with uniform amplitude and Bloch waves with periodic amplitude.

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Section: Polarization Insensitive Scsupporting

confidence: 84%

Section: Fundamentals Of Self‐collimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self‐Collimation in Photonic Crystals: Applications and Opportunities

2017

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“…Earlier experimental and theoretical studies of the PCs have focused on photonic band gaps and several appropriate devices have already been developed [3]. But in the recent years, the studies have revealed that the photonic bands show unusual dispersion properties, which make them sources of several attractive effects [4,5] such as negative refraction and left handedness [6][7][8], super-prism [9], slow light [10] and SC [2,[11][12][13][14][15][16][17][18][19] effects. Among these, the SC in PCs provides a brand new way of confining light propagation, which is different from conventional PC waveguides.…”

Section: Introductionmentioning

confidence: 99%

An approach to achieve all-angle, polarization-insensitive and broad-band self-collimation in 2D square-lattice photonic crystals

Noori¹,

Soroosh²,

Baghban³

2015

Ukr. J. Phys. Opt.

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Abstract. We have investigated the possibility for achieving (in the same structure), an all-angle, polarization-insensitive and broad-band self-collimation (SC), one of the most urgent requirements in the field of optical integration. To obtain these attractive SC features in 2D square-array photonic crystals, we have used several strategies and performed testing calculations, using plane-wave expansion and finite-difference time-domain methods. We have not complicated the basic structure for the SC and ensured its simple geometry. The all-angle SC can arise when the optical material of a hole-type structure is high-index. Our results have testified that the SC in the hole-type structure is less dependent on the light polarization, if compared with a similar rod-type one. Our optimized SC structure has a bandwidth of Δf/f c = 2.61% and supports the all-angle SC for both TE and TM polarizations at the expense of small (~ 3) deviation of light from the unique collimation direction. Notice that the latter can be tolerated in many integrated optical devices.

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Optimize design super collimation in square lattice two-dimensional photonic crystals

Cited by 2 publications

References 12 publications

Self‐Collimation in Photonic Crystals: Applications and Opportunities

Self‐Collimation in Photonic Crystals: Applications and Opportunities

An approach to achieve all-angle, polarization-insensitive and broad-band self-collimation in 2D square-lattice photonic crystals

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