Fabrication and Characterization of Woodpile Waveguides for Microwave Injection in Ion Sources

Mauro, G. S.; Locatelli, Andrea; Torrisi, G.; Leonardi, O.; Celona, L.; Angelis, C. De; Sorbello, G.

doi:10.1109/tmtt.2020.2969395

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By imposing d = 2.082 µm, we obtain a band gap centered at around 60 THz, with fundamental woodpile dimensions w = 0.588 µm, and h = 0.736 µm. As a second step, we obtain a hollow core accelerating waveguide by removing a specific amount of dielectric material from the structure creating the so-called "defect" region, where the beam will propagate [14,15]. The accelerating waveguide, whose projected band diagram is visible in Figure 3, is tuned in order to support a confined TM 01 -like mode and has dimensions w d = 2.429 µm and h d = 2.209 µm (see Figure 2a).…”

Section: Hollow-core Woodpile Coupler Designmentioning

confidence: 99%

Numerical Simulation of a Hollow-Core Woodpile-Based Mode Launcher for Dielectric Laser Accelerators

et al. 2022

Self Cite

View full text Add to dashboard Cite

Hollow core microstructures powered by infrared lasers represent a new and promising area of accelerator research, where advanced concepts of electromagnetism must be used to satisfy multiple requirements. Here, we present the design of a dielectric electromagnetic band gap (EBG) mode launcher–converter for high-power coupling in dielectric laser accelerators (DLAs). The device is based on a silicon woodpile structure, and it is composed of two perpendicularly coupled hollow-core waveguides—a transverse electric (TE)-like mode waveguide (excited from laser power) and a transverse magnetic (TM)-like mode (accelerating) waveguide—in analogy with the TE10-to-TM01 waveguide mode converters of radio frequency (RF) linear accelerators (LINACs). The structure is numerically designed and optimized, showing insertion losses (IL) <0.5 dB and efficient mode conversion in the operating bandwidth. The operating wavelength is 5 μm, corresponding to a frequency of ≈60 THz, in a spectral region where solid-state continuous-wave (CW) lasers exist and are actively developed. The presented woodpile coupler shows an interaction impedance in the order of 10 kΩ, high power handling and efficiency.

show abstract

Section: Hollow-core Woodpile Coupler Designmentioning

confidence: 99%

Numerical Simulation of a Hollow-Core Woodpile-Based Mode Launcher for Dielectric Laser Accelerators

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…PhCs with photonic band gaps (PBGs) also have been used to design multiple devices for photovoltaic applications [ 13 ] like filters [ 14 ], routers [ 15 ], resonators [ 16 ], optical logic gates [ 17 ], adders [ 18 ], phase shifters [ 19 ] and some all-optical memory components [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. The PBGs of some different types of PhCs are generally calculated by the plane wave expansion method (PWEM) based on the Bandsolve module in Rsoftwave, which is a mathematical method used to expand a wave function or physical quantity into a linear combination of plane waves.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Polarization Isolator Using Two-Dimensional Square Lattice Tellurium Rod Array

Wang,

Ai,

Gan

et al. 2024

Micromachines

View full text Add to dashboard Cite

A novel terahertz polarization isolator using a two-dimensional square lattice tellurium rod array is numerically investigated at the interesting band of 0.22 THz in this short paper. The isolator is designed by inserting six hexagonal tellurium rods into a fully polarized photonic crystals waveguide with high efficiency of −0.34 dB. The TE and TM photonic band gaps of the 7 × 16 tellurium photonic crystals are computed based on the plane wave expansion method, which happen to coincide at the normalized frequency domain from 0.3859(a/λ) to 0.4033(a/λ), corresponding to the frequency domain from 0.2152 to 0.2249 THz. The operating bandwidth of the tellurium photonic crystals waveguide covers 0.2146 to 0.2247 THz, calculated by the finite element method. The six hexagonal tellurium rods with smaller circumradii of 0.16a serve to isolate transverse electric waves and turn a blind eye to transverse magnetic waves. The polarization isolation function and external characteristic curves of the envisaged structure are numerically simulated, which achieves the highest isolation of −33.49 dB at the central frequency of 0.2104 THz and the maximum reflection efficiency of 98.95 percent at the frequency of 0.2141 THz. The designed isolator with a unique function and high performance provides a promising approach for implementing fully polarized THz devices for future 6G communication systems.

show abstract

“…Since the photonic crystal (PhC) was first investigated [ 4 , 5 ], microwave photonic devices based on PhCs for high-frequency operations have drawn considerable concern and attracted much research [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. PhCs have been shown to be an effective medium for transmitting as well as controlling electromagnetic waves, which can readily facilitate the miniaturization and integration of devices at the same time [ 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Wideband Microwave Photonic Circulator Using Two Asymmetric Partial-Height Triangle Ferrites

Wang¹,

et al. 2022

Materials

View full text Add to dashboard Cite

Broadband 5G communication requires the operation of nonreciprocal devices in the Ku band. A wideband photonic crystal circulator is implemented by introducing two partial-height triangular Ni-Zn ferrites into the Al2O3 ceramic rod-arrays. The asymmetric sizes of the two equilateral triangles paired with self-matching effectively extend the bandwidth of the circulator eight times over that of the symmetric scheme. Numerical simulations demonstrate that the photonic crystal circulator can obtain a bandwidth of 1.00 GHz with an isolation 25.75 dB and an insertion loss 0.381 dB through optimized matched triangle size ratio, suitable for applications in future communication systems.

show abstract

Fabrication and Characterization of Woodpile Waveguides for Microwave Injection in Ion Sources

Cited by 5 publications

References 15 publications

Numerical Simulation of a Hollow-Core Woodpile-Based Mode Launcher for Dielectric Laser Accelerators

Numerical Simulation of a Hollow-Core Woodpile-Based Mode Launcher for Dielectric Laser Accelerators

Terahertz Polarization Isolator Using Two-Dimensional Square Lattice Tellurium Rod Array

Wideband Microwave Photonic Circulator Using Two Asymmetric Partial-Height Triangle Ferrites

Contact Info

Product

Resources

About