Broadband photonic bandgap waveguides

Tse, S.; Karousos, A.; Young, Paul R.

doi:10.1109/mwsym.2004.1339020

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Recent results obtained for a micro-phononic crystal formed by placing a honeycomb lattice of air holes in a suspended Si plate [36] demonstrates measured bandgap widths comparable to those seen in solid/solid square lattice micro-phononic crystals [28][29][30]. The honeycomb lattice, when compared to hexagonal and square lattices, has also been shown to provide wider bandgaps for a given matrix/inclusion material set in photonic [37] and macro-scale phononic crystals [10].…”

Section: Air/solid Phononic Crystalsmentioning

confidence: 89%

Microfabricated phononic crystal devices and applications

Olsson

El-Kady

2008

Meas. Sci. Technol.

324

191

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Phononic crystals are the acoustic wave analogue of photonic crystals. Here a periodic array of scattering inclusions located in a homogeneous host material forbids certain ranges of acoustic frequencies from existence within the crystal, thus creating what are known as acoustic bandgaps. The majority of previously reported phononic crystal devices have been constructed by hand, assembling scattering inclusions in a viscoelastic medium, predominantly air, water or epoxy, resulting in large structures limited to frequencies below 1 MHz. Recently, phononic crystals and devices have been scaled to VHF (30–300 MHz) frequencies and beyond by utilizing microfabrication and micromachining technologies. This paper reviews recent developments in the area of micro-phononic crystals including design techniques, material considerations, microfabrication processes, characterization methods and reported device structures. Micro-phononic crystal devices realized in low-loss solid materials are emphasized along with their potential application in radio frequency communications and acoustic imaging for medical ultrasound and nondestructive testing. The reported advances in batch micro-phononic crystal fabrication and simplified testing promise not only the deployment of phononic crystals in a number of commercial applications but also greater experimentation on a wide variety of phononic crystal structures.

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Section: Air/solid Phononic Crystalsmentioning

confidence: 89%

Microfabricated phononic crystal devices and applications

Olsson

El-Kady

2008

Meas. Sci. Technol.

324

191

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show abstract

“…Recent results obtained for a microphononic crystal formed by placing a honeycomb lattice of air holes in a suspended Si plate [35] demonstrates measured bandgap widths comparable to those seen in solid/solid square lattice micro-phononic crystals [28][29][30]. The honeycomb lattice, when compared to hexagonal and square lattices, has also been shown to provide wider bandgaps for a given matrix/inclusion material set in photonic [36] and macro-scale phononic crystals [10].…”

Section: Air/solid Phononic Crystalsmentioning

confidence: 98%

Research on micro-sized acoustic bandgap structures.

Fleming¹,

McCormick²,

Su³

et al. 2010

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Phononic crystals (or acoustic crystals) are the acoustic wave analogue of photonic crystals. Here a periodic array of scattering inclusions located in a homogeneous host material forbids certain ranges of acoustic frequencies from existence within the crystal, t hus creating what are known as acoustic (or phononic) bandgaps. The vast majority of phononic crystal devices reported prior to this LDRD were constructed by hand assembling scattering inclusions in a lossy viscoelastic medium, predominantly air, water or epoxy, resulting in large structures limited to frequencies below 1 MHz. Under this LDRD, phononic crystals and devices were scaled to very (VHF: 30-300 MHz) and ultra (UHF: 300-3000 MHz) high frequencies utilizing finite difference time domain (FDTD) mo deling, microfabrication and micromachining technologies. This LDRD developed key breakthroughs in the areas of micro-phononic crystals including physical origins of phononic crystals, advanced FDTD modeling and design techniques, material co nsiderations, microfabrication processes, characterization methods and device structures. Micro-phononic crystal devices realized in low-loss solid materials were emphasized in this work due to their potential applications in radio frequency co mmunications and acoustic imaging for medical ultrasound and nondestructive testing. The results of the advanced modeling, fabrication and integrated transducer designs were t hat this LDRD produced the 1 st measured phononic crystals and phononic crystal devices (waveguides) operating in the VHF (67 MHz) and UHF (937 MHz) frequency bands and est ablished Sandia as a world leader in the area of micro-phononic crystals. 4 AcknowledgementsThe authors would like to acknowledge the memory of our late colleague and friend Jim Fleming. It was Jim's vision to pursue a research program in the area of acoustic bandgap crystals and his vision lives on today through the team he assembled. The authors would like that thank the MDL staff at Sandia National Laboratories including Jim Stevens for his work developing the AlN transducer film, Craig Nakakura for his work on AlN etching, Keith Yoneshige for his work supporting the tungsten chemical mechanical polish (CMP) and Todd Bauer and Rob Jarecki for their work on process and etch development.

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“…The substrate dielectric constant is 10.2 with a thickness of 1.15mm, and the lattice spacing is 12.5mm with air holes arranged in a triangle shape. This EBG structure design is derived from [1] by changing configuration of unit cells. The parallelogram unit cell of the original EBG structure is modified into a rectangle with three cylindrical air holes arranged in triangle shape as shown in Fig.…”

Section: Design Of the Ebg Structurementioning

confidence: 99%

Development of analysis method of electromagnetic bandgap (EBG) structures to predict EBG behavior based on circuit models

Kim

Drayton

2006

2006 IEEE Antennas and Propagation Society International Symposium

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An Electromagnetic Bandgap (EBG) structure is designed and analyzed with full-wave analysis tool (HFSS) and circuit modeling tool (ADS). The forbidden bands of the EBG structure are obtained from the dispersion diagrams formed by eigenmode solutions with different phase relationships of boundaries. Furthermore, the lumped element circuit models of the EBG structure are developed using standard circuit modeling techniques. Even though the limitation for high-order mode exists, the simulation results of the lumped element circuit model are consistent with the HFSS simulation results.

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Broadband photonic bandgap waveguides

Cited by 5 publications

References 4 publications

Microfabricated phononic crystal devices and applications

Microfabricated phononic crystal devices and applications

Research on micro-sized acoustic bandgap structures.

Development of analysis method of electromagnetic bandgap (EBG) structures to predict EBG behavior based on circuit models

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