SVL Short Course Module 1 -- Introductionemlab.utep.edu/scSVL/SVL Short Course Module 1 -- Introduction.pdf · SVL Short Course -- Module 1 Raymond C. Rumpf "Engineering the Dispersion

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Pioneering 21st Century Electromagnetics and Photonics

Module 1 –Introduction

Course Website:http://emlab.utep.edu/scSVL.htm

EM Lab Website:http://emlab.utep.edu/

Short CourseShort Course Outline

• Module 1 – Introduction– What is a spatially-variant lattice?

– Why is it good?

• Module 2 – Spatially-Variant Planar Gratings

• Module 3 – Spatially-Variant Lattices

• Module 4 – MATLAB to CAD

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Spatially-Variant Lattices

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Classes of Periodic Structures

http://emlab.utep.edu

Flat Volumetric

Siz

e <

<

Siz

e ~

Metasurfaces

Frequency Selective Surfaces

Metamaterials

Photonic Crystals

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Electromagnetic fields and waves cannot be controlled using homogeneous materials.

There must exist some kind of inhomogeneity.

If we use metamaterials, metasurfaces, and photonic crystals as artificial materials, why are so many lattices

macroscopically homogeneous?

Because it is not well known how to make them inhomogeneous without destroying their properties.

Imagine what we are missing!

Short Course

Spatially Variant Lattices

SVL Short Course -- Module 1

Raymond C. Rumpf "Engineering the Dispersion and Anisotropy of Periodic Electromagnetic Structures," Solid State Physics, Vol. 66, pp. 213-300, 2015.

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What Can Be Spatially Varied?

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Arrays on Curved Surfaces


perspective view

top view

R. C. Rumpf, et al "Spatially-Variant Periodic Structures in Electromagnetics," Phil. Trans. R. Soc. A 373, 2014.0359, July 2015.

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Periodic structures can be placed onto curved surfaces without deforming the elements or their spacing.

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Short Course

Arrays of Discontinuous Metallic Elements


+ =

R. C. Rumpf, et al "Spatially-Variant Periodic Structures in Electromagnetics," Phil. Trans. R. Soc. A 373, 2014.0359, July 2015.

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Achievements Using Spatially-

Variant Structures

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Polarization Control Using Spatially-Variant Form Birefringence

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A. Mehta, J. D. Brown, P. Srinivasan, R. C. Rumpf, E. G. Johnson, “Spatially polarizing autocloned elements,” Opt. Lett. 32, 1935–1937 (2007) .

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Compensation for Surface Curvature


R. C. Rumpf, M. Gates, C. L. Kozikowski, W. A. Davis, "Guided-Mode Resonance Filter Compensated to Operate on a Curved Surface," PIER C, Vol. 40, pp. 93-103, 2013.

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Spatially-Variant Self-Collimation

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unit cell orientation (degrees)

~20 dB

• Manufactured by 3D printing• Operated at 15 GHz

R. C. Rumpf, J. Pazos, C. R. Garcia, L. Ochoa, and R. Wicker, "3D Printed Lattices with Spatially Variant Self-Collimation," PIER, Vol. 139, pp. 1-14, 2013.

Short Course

World’s Tightest Unguided Bend


30 m• Bend radius was 6.70.

• Low refractive index(SU-8, n 1.59).

• Operated at 0 = 2.94 m.

• Recently demonstrated 0 = 1.55 m

J. L. Digaum, J. J. Pazos, J. Chiles, J. D'Archangel, G. Padilla, A. Tatulian, R. C. Rumpf, S. Fathpour, G. D. Boreman, and S. M. Kuebler, "Tight Control of Light Beams in Photonic Crystals with Spatially-Variant Lattice Orientation," Optics Express, Vol. 22, Issue 21, pp. 25788-25804, 2014.

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Zero Mode Coupling in MM Waveguides with Sharp Bends


First-Order Mode Third-Order ModeSecond-Order Mode

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R. C. Rumpf, et al, “Spatially-variant periodic structures in electromagnetics,” accepted for publication in Phil. Trans. A, Dec. 2014.

Short Course

Optical High-Speed Interconnects


SVPC Jumper

Circuit Board

BGA w VCSELs

SVPC Funnel

Sharp Waveguide Bends

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Microstrip Made Immune to Metal Object in Close Proximity


R. C. Rumpf, C. R. Garcia, H. H. Tsang, J. E. Padilla, M. D. Irwin, "Electromagnetic Isolation of a Microstripby Embedding in a Spatially Variant Anisotropic Metamaterial," PIER, Vol. 142, pp. 243-260, 2013.

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Patent Pending

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Two Antennas Decoupled in 3D Printed Mobile Phone


Patent Pending

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Combining Spatial Transforms with Synthesis Tool (1 of 2)


Step 1 of 4:Define Spatial Transform C

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R. C. Rumpf, et al, “Spatially-variant periodic structures in electromagnetics,” accepted for publication in Phil. Trans. A, Dec. 2014.

Documents

SVL Short Course Module 1 -- Introductionemlab.utep.edu/scSVL/SVL Short Course Module 1 -- Introduction.pdf · SVL Short Course -- Module 1 Raymond C. Rumpf "Engineering the Dispersion