Ultrashort low-loss Ψ gates for linear optical logic on Si photonics platform
Autor: | Kenta Takata, Kengo Nozaki, Masaya Notomi, Shota Kita, Akihiko Shinya |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Physics
business.industry Computation Physics::Optics General Physics and Astronomy Binary number lcsh:Astrophysics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Multiplexing Signal lcsh:QC1-999 Power (physics) 010309 optics Nonlinear system Computer Science::Hardware Architecture 0103 physical sciences lcsh:QB460-466 Optoelectronics Photonics 0210 nano-technology business Energy (signal processing) lcsh:Physics |
Zdroj: | Communications Physics, Vol 3, Iss 1, Pp 1-8 (2020) |
ISSN: | 2399-3650 |
Popis: | Nonlinear optical gates are usually considered as fundamental building blocks for universal optical computation. However, the performance is severely limited by small optical nonlinearity, thereby bounding their operation speed, consumption energy, and device size. In this paper, we propose and experimentally demonstrate linear optical logic operations with ~3 μm-long Si wire “Ψ” gates consist of 3 × 1 optical combiners including auxiliary bias port, which maximizes the binary contrast of the output in telecom wavelength. We have demonstrated 20 Gbps Boolean “AND” operation with experimentally measured small signal loss (1.6 dB experimentally). A single Ψ gate can perform representative Boolean operations by changing the bias power and relative phases. We have also demonstrated wavelength-independent operation by seven wavelengths, which leads to wavelength-division multiplexed parallel computation. This ultrashort, highly-integrable, low-loss, and energy-efficient optical logic gates pave the way for ultralow latency optical pattern matching, recognition, and conversion. The performance of components for optical computation has so far been limited by their modest nonlinear responses, reducing their speed while increasing the energy consumed. Here, a microscale, low-loss linear optical logic gate consisting of Si wire is demonstrated, capable of operating at 20 Gbps. |
Databáze: | OpenAIRE |
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