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INTEGRATED OPTICS

A new change of phase

Nature Photonics volume 16, pages 479–480 (2022)Cite this article

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Ferroelectric domain switching controlled by electrical pulses provides a controllable means to tune the refractive index of BaTiO3 thin films. Now, a device based on this material is presented that is capable of implementing low-power, high-speed and CMOS-compatible programmable phase shifters in silicon photonic chips.

Just like transistors in microelectronic chips, optical phase shifters (OPS) play a key role as the fundamental building block in photonic integrated circuits (PICs)1. While electronics is digital and operates with voltage or current signals, photonics is analogue and operates with amplitude and phase of lightwave signals. OPS controlled by electronic signals and embedded in interferometers can carry out dynamic modulation and switching tasks2.

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Fig. 1: Optical phase shifters.

adapted from ref. 10, Springer Nature Ltd.

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Authors and Affiliations

  1. Universitat Politècnica de València and iPronics Programmable Photonics, Valencia, Spain

    José Capmany

  2. iPronics Programmable Photonics, Valencia, Spain

    Daniel Pérez-López

Authors
  1. José Capmany
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  2. Daniel Pérez-López
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Correspondence to José Capmany.

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Capmany, J., Pérez-López, D. A new change of phase. Nat. Photon. 16, 479–480 (2022). https://doi.org/10.1038/s41566-022-01030-x

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