Analysis of Self-Collimation Based Cavity Resonator Formed by Photonic Crystal

Yogesh, N.; Subramanian, V.

doi:10.2528/pierm10012604

Cited by 8 publications

(5 citation statements)

References 19 publications

(28 reference statements)

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“…A ring microcavity can be constructed by alternately arranging the wedges of the same size in a closed loop, which are made from negative and positive refractive index materials equal in magnitude. [23][24][25][26][27][28] Equal size is required for the positive and negative index wedges to ensure that the zero optical path is achieved in the closed ray path. In general, the positive index material is simply selected to be air, and thus the negative index material has the effective refractive index n = À 1.…”

Section: Introductionmentioning

confidence: 99%

“…An open ring cavity is thus formed with air wedge regions open to external environments. [23][24][25][26][27][28] However, the air regions in the cavity only occupy half of the whole cavity. Moreover, since the perfect airmatched wave impedance heavily depends on precise control of both direction and position of interface termination, the alternated geometry looks too complicated and makes it not feasible to achieve a high-quality open microcavity.…”

Section: Introductionmentioning

confidence: 99%

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Fully Open Ring Microcavities Based on Metagratings

Zhou

2023

Advanced Photonics Research

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Open optical microcavities are crucial to precise manipulation of light–matter interaction in solid‐state and biological systems. However, only open linear microcavities are practically realized, limiting the application of open microcavities in more scenarios. Herein, an ease‐fabrication fully open ring microcavity is theoretically demonstrated that supports simultaneously multiple concentric cavity modes with coupling interaction. It comprises two orthogonal dielectric metagratings, which are a single layer of silicon rods and enable transmitted waves to travel in a negative angle. Except for fully open configuration, the open microcavity also incorporates the advantages of low absorption loss and the compatibility to the current CMOS process. It offers a unique platform for controlling the interaction between light and atoms, molecules, nanoparticles, or biomolecules and will find a broad range of applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fully Open Ring Microcavities Based on Metagratings

Zhou

2023

Advanced Photonics Research

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“…For example, they can help eliminate the sensitivity of optical coatings, beam splitters, and interferometers to the angle of incidence. Furthermore, divergence-free propagation makes it possible to construct new types of laser resonators that,e.g.,can be insensitive to the alignment of the cavity mirrors [20,21]. Regarding optical waveguide technologies, diffraction-free slab waveguides can be used to transfer an arbitrary light intensity distribution from the input to the output facet of the slab without modifications [22].…”

Section: Introductionmentioning

confidence: 99%

An optical metamaterial with simultaneously suppressed optical diffraction and surface reflection

Kivijärvi¹,

Nyman²,

Shevchenko³

et al. 2016

J. Opt.

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Diffraction-free propagation of light has been demonstrated in free space for Bessel-like beams and for arbitrary beams in specially designed photonic crystals and metamaterials. The phenomenon is called self-collimation in photonic crystals and canalization in metamaterials, as the approaches to obtaining the effect are different. In both cases, however, diffraction-free propagation of light is achieved by making the dispersion surface of the material at a given frequency flat. In photonic crystals this is done by tuning the unit-cell dimensions close to the band-gap regime, and in metamaterials by tuning a hyperbolic-type metamaterial towards its transition to an ordinary elliptical metamaterial. In this work, we propose an alternative way to suppress optical diffraction in a metamaterial by adjusting the anisotropy of the finite-sized three-dimensional metamolecules and the material’s spatial dispersion. The approach allows matching the wave impedance of the material to that of the surrounding medium in a wide range of incidence angles and thereby also suppressing optical reflection from the material’s surface.

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“…In recent years, the development of fabrication techniques has enabled PCs to function at optical frequencies, and various self-collimation-based devices have been proposed, such as non-channel waveguides, beam splitters, open cavities [8], beam combiners and optic logic [9]. Theoretically, many reports in the literature have focused on the conventional and all-angle self-collimation with a flat equi-frequency contour (EFC) across the entire Brillouin zone [5], [10], [11], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Scale and Large-Angle Self-Collimation in a Photonic Crystal Composed of Silicon Nanorods

et al. 2013

IEEE Photonics J.

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We report the observation of a large-angle self-collimation phenomenon occurring in photonic crystals composed of nanorods. Electromagnetic waves incident onto such photonic crystals from directions covering a wide-range of incident angles become highly localized along a single array of rods, which results in narrow-beam propagation without divergence. A propagation length of 0.4 mm is experimentally observed over the wavelength range of 1540 nm to 1570 nm, even in the large incident angle case, which is a very considerable length scale for on-chip optical interconnection.

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Analysis of Self-Collimation Based Cavity Resonator Formed by Photonic Crystal

Cited by 8 publications

References 19 publications

Fully Open Ring Microcavities Based on Metagratings

Fully Open Ring Microcavities Based on Metagratings

An optical metamaterial with simultaneously suppressed optical diffraction and surface reflection

Millimeter-Scale and Large-Angle Self-Collimation in a Photonic Crystal Composed of Silicon Nanorods

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