3D woodpile structure tunable plasma photonic crystal

Abstract

A 3D woodpile structure tunable plasma photonic crystal is designed, simulated, and experimentally characterized over the S -X band of the electromagnetic spectrum. The measurements confirm that the electromagnetic response is rich in dynamics. The photonic crystal's reconfigurability, achieved through individual discharge control of the properties of the woodpile plasma columns, offers an unprecedented opportunity to better resolve the interactions between both the Bragg and localized surface plasmon modes which dominate the spectrum at lower frequencies.Both the experiments and simulations reveal evidence for the coupling of Bragg and surface plasmon modes through a Fano resonance. arXiv:1810.02000v1 [physics.app-ph] 3 Oct 2018 3D woodpile structure tunable plasma photonic crystal

Study on Transmission Characteristics and Bandgap Types of Plasma Photonic Crystal

“…Since the concept of PPCs was proposed, its transmission characteristics have been the focus of research. Sakai et al first proposed the concept of PPCs, constructed a helium discharge plasma array at atmospheric pressure, and investigated the bandgap of PPCs by experimental tests and numerical calculations [1,2]; Fan [3] and Wang et al [4], used dielectric barrier discharge (DBD) with two water electrodes to obtain a two-dimensional PPC with tunable lattice arrangement and photonic bandgap; Wang et al [5] designed a threedimensional woodpile type PPC and calculated and tested its transmission characteristics; Zhang [6], Wen [7], and Wang [8] composed a PPC using plasma discharge tubes and tested and calculated its transmission and absorption characteristics; V. I. Arkhipenko et al [9] 2 of 13 obtained PPCs using neon glow discharge arrays, placed them in waveguides, and studied the transmission characteristics of PPCs at X-band; V. S. Babitski [10] obtained a PPC using argon pulse discharge at atmospheric pressure and also calculated and tested the transmission characteristics of PPCs. The results show that the properties of PPCs are similar to those of metallic photonic crystals at high electron density.…”

Inverse design of plasma metamaterial devices for optical computing

“…The polarization of the input source has a strong effect in devices of this nature, either E z (E out of the page), which we call the TM case, or E x (H out of the page), which we call the TE case. Previous work with PMMs indicates that both the TM and TE responses are tunable, with the latter benefitting from the presence of LSP modes [20,25], while the former makes more direct use of dispersive and refractive effects [21][22][23]. The simulated E x and E z fields are masked to compute the field intensity and mode overlap integrals along planes of interest within the problem geometry.…”

“…In addition, when the PMM is composed of elements that are small compared to the operating wavelength, we can access localized surface plasmon (LSP) modes along the boundary between a positive permittivity background and a negative permittivity plasma element. Such surface modes can yield more complex and efficient power transfer [20,21], allowing for a particularly high degree of reconfigurability. Prior work by authors Wang and Cappelli with plasma photonic crystals (PPCs) has already highlighted the richness of this geometry in waveguide [22] and bandgap [20,23,24] devices.…”

“…Such surface modes can yield more complex and efficient power transfer [20,21], allowing for a particularly high degree of reconfigurability. Prior work by authors Wang and Cappelli with plasma photonic crystals (PPCs) has already highlighted the richness of this geometry in waveguide [22] and bandgap [20,23,24] devices. The rich and var-ied physics of PMMs is well matched to inverse design methods which promise to allow more holistic and efficient exploration of the configuration space.…”

Scattering from spheres made of time-varying and dispersive materials

“…But the modulation depth of such dispersionless materials -a parameter that determines the strength of the effects caused by temporal modulations -is typically very low, being of the order of 10 −4 − 10 −3 [44]. In contrast, material candidates that allow large modulation depths of the permittivity, including electron plasmas [45] and aluminum-doped zinc [46] and indium tin oxides [34], are usually strongly dispersive at the frequencies of interest (specifically, in the epsilonnear-zero region, where the modulation depth is large). To our knowledge, only a few recent papers tackled this problem and studied the influence of frequency dispersion in time-modulated materials [47][48][49].…”