Design and Characterization of a Silicon W-Band Woodpile Photonic Crystal Waveguide

Torrisi, G.; Locatelli, Andrea; Mauro, G. S.; Bellettato, M.; Celona, L.; Mancarella, F.; Angelis, C. De; Sorbello, G.

doi:10.1109/lmwc.2020.2972743

Cited by 6 publications

(1 citation statement)

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“…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

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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.

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Section: Hollow-core Woodpile Coupler Designmentioning

confidence: 99%