SWCNT@MWCNT Photonic-Ternary Device

Overview

The foundational device patent covers three core inventions: chemical vapor deposition fabrication of the SWCNT@MWCNT structure, the photonic-to-ternary transducer architecture, and the AC switching method. The device consists of two concentric carbon nanotubes — a metallic inner nanotube inside a multi-walled nanotube — separated by a van der Waals gap.

Trit encoding uses photon absorption combined with AC pulse polarity: a photon during the positive phase of the AC cycle produces trit +1, no photon produces a true zero (trit 0), and a photon during the negative phase produces trit −1. The device operates as a photonic-to-electrical transducer, not a traditional gate-controlled FET.

A gate photon determines whether the device conducts; the AC terminal polarity then determines the direction — and therefore the trit value. The switching mechanism is specification-level detail, available under NDA.

Key Innovations

• Two-layer SWCNT@MWCNT coaxial structure as a photonic-ternary transducer
• AC pulse polarity encoding for balanced ternary states (+1, 0, −1)
• Photon gating of the conduction state (mechanism under NDA)
• Chemical vapour deposition fabrication method (specifics under NDA)
• True zero state from absence of signal — no gate bias required
• Dual-photon operation for additional distinguishable states (details under NDA)

Technical Approach

The SWCNT is a metallic ballistic conductor functioning as a one-dimensional transmission line. Trits are AC pulse polarities on this transmission line, not DC gate-controlled carrier types. The three inputs — two photon wavelengths and an AC signal — are each independent and can each operate at their own clock rate.

In dual-photon mode, two photons at different wavelengths address the MWCNT gate and SWCNT signal independently. Combined with AC polarity, this yields 12 distinguishable states from a single device — wavelength-division multiplexing at the nanotube level.

Verification

The device was rigorously verified using non-equilibrium Green's function (NEGF) quantum transport simulation on 2 April 2026. The simulation confirms simulation-confirmed trit encoding with digital-grade signal-to-noise ratio. GW+BSE optical calculations verify the M₁₁ transition of the inner SWCNT and E₂₂ of the outer MWCNT shell, enabling dual-photon operation. Specific current values, noise floor, SNR, wavelengths, and conductance values are shared under mutual NDA — contact manish@manitlab.org to request access.

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