Fully packaged millimetre‐wave dielectric waveguide with multimodal excitation

Dolatsha, Nemat; Saiz, Nicholas D.; Arbabian, Amin

doi:10.1049/el.2015.2306

Cited by 19 publications

(2 citation statements)

References 6 publications

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“…Another aspect in which mm-wave quantum links can be advantageous when compared with direct microwave connections is the size of the waveguide. While WR-90 microwave waveguides operating around 10 gigahertz are relatively large with a cross section of approximately 1 cm × 2 cm, the dimensions of dielectric waveguides at mm-wave frequencies [44] can be smaller by a factor of more than 10 determined by the frequency ratio and the dielectric constant of the used material. This means that the number of quantum channels which can be established in a given cross-section is more than hundred times higher in the mm-wave domain.…”

Section: Footprint Of the Quantum Linkmentioning

confidence: 99%

Millimeter-wave interconnects for microwave-frequency quantum machines

Pechal

Safavi-Naeini

2017

Phys. Rev. A

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Superconducting microwave circuits form a versatile platform for storing and manipulating quantum information. A major challenge to further scalability is to find approaches for connecting these systems over long distances and at high rates. One approach is to convert the quantum state of a microwave circuit to optical photons that can be transmitted over kilometers at room temperature with little loss. Many proposals for electro-optic conversion between microwave and optics use optical driving of a weak three-wave mixing nonlinearity to convert the frequency of an excitation. Residual absorption of this optical pump leads to heating, which is problematic at cryogenic temperatures. Here we propose an alternative approach where a nonlinear superconducting circuit is driven to interconvert between microwave-frequency and millimeter-wave-frequency (300 GHz) photons. To understand the potential for quantum conversion between microwave and mm-wave photons, we consider the driven four-wave mixing quantum dynamics of nonlinear circuits. In contrast to the linear dynamics of the driven three-wave mixing converters, the proposed four-wave mixing converter has nonlinear decoherence channels that lead to a more complex parameter space of couplings and pump powers that we map out. We consider physical realizations of such converter circuits by deriving theoretically the upper bound on the maximum obtainable nonlinear coupling between any two modes in a lossless circuit, and synthesizing an optimal circuit based on realistic materials that saturates this bound. Our proposed circuit dissipates less than $10^{-9}$ times the energy of current electro-optic converters per qubit. Finally, we outline the quantum link budget for optical, microwave, and mm-wave connections, showing that our approach is viable for realizing interconnected quantum processors for intracity or quantum datacenter environments

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Section: Footprint Of the Quantum Linkmentioning

confidence: 99%

Millimeter-wave interconnects for microwave-frequency quantum machines

Pechal

Safavi-Naeini

2017

Phys. Rev. A

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“…Thus, the choice of polymer material is a key point for SPDWs in achieving low transmission loss. Some groups have investigated the characteristics of SPDWs with different polymers and structures [7,9,[15][16][17][18]20,26,27]. The transmission loss has been studied in the above literature.…”

Section: Introductionmentioning

confidence: 99%

Transmission Characteristics of Flexible Low-Loss Solid Circular Polymer Dielectric Waveguides for Sub-THz Applications

Liao

Xue

et al. 2022

J Infrared Milli Terahz Waves

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This work investigates transmission characteristics of flexible solid circular polymer dielectric waveguides (SCPDWs) in the sub-THz band, especially those important for practical applications, including transmission loss, energy confinement and bending loss. In addition, the expanded polyethylene (EPE) cladding and interconnector are introduced to ensure good working conditions and quickly extend transmission length, respectively. The 1.5-mm-diameter SCPDW made of properly selected polytetrafluoroethylene (PTFE) is considered, which is flexible and low-loss. The simulation shows that more than 99% power can be confined in the 9-mm-diameter circular area when the frequency is over 90 GHz. The prototypes are fabricated and measured within 88-140 GHz. The measurement shows that the PTFE SCPDW has 0.5-4.8 dB/m loss, much lower than most reported solid polymer dielectric waveguides (SPDWs). A 30-mm-radius 90°bending is generally lossless in frequencies over 120 GHz, and adopting the polarization orthogonal to the bending direction can improve the bending loss. A 9-mm-diameter EPE cladding brings about 1 dB/m attenuation, which, however, dramatically reduces external interference on the PTFE SCPDW. The designed interconnector can easily extend the SCPDW transmission length with an acceptable ≤ 2-dB loss. The above results prove that the PTFE SCPDW and its corresponding cladding and interconnector can achieve good sub-THz high-speed wired interconnects. Though only a specific diameter is considered, the performances of SCPDWs with different diameters can

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Sub-terahertz Dual-polarized Low-loss Transmission System Using COC-Based Dielectric Waveguide

Chen,

Zhang

et al. 2024

J Infrared Milli Terahz Waves

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Fully packaged millimetre‐wave dielectric waveguide with multimodal excitation

Cited by 19 publications

References 6 publications

Millimeter-wave interconnects for microwave-frequency quantum machines

Millimeter-wave interconnects for microwave-frequency quantum machines

Transmission Characteristics of Flexible Low-Loss Solid Circular Polymer Dielectric Waveguides for Sub-THz Applications

Sub-terahertz Dual-polarized Low-loss Transmission System Using COC-Based Dielectric Waveguide

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