Publication

Low-loss heterogeneously integrated barium-titanate-on-silicon-nitride photonics

Tobias Kippenberg, Rui Ning Wang, Mikhail Churaev, Viacheslav Snigirev
2023

Abstract

We present a hybrid barium titanate photonics platform exhibiting exceptionally low losses of 0.7 dB/cm and realize ring resonators with intrinsic quality factors exceeding 6×105. Measurement of Vπ L = 0.56 V·cm in electro-optic modulation experiments demonstrates the platform’s potential.

Official source

https://infoscience.epfl.ch/entities/publication/8856e1b8-5ac1-4365-a8b4-8211754e4260

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Tobias Kippenberg, Rui Ning Wang, Mikhail Churaev, Viacheslav Snigirev
2023

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8856e1b8-5ac1-4365-a8b4-8211754e4260

About this result

Related concepts (12)

Frequency comb

In optics, a frequency comb is a laser source whose spectrum consists of a series of discrete, equally spaced frequency lines. Frequency combs can be generated by a number of mechanisms, including periodic modulation (in amplitude and/or phase) of a continuous-wave laser, four-wave mixing in nonlinear media, or stabilization of the pulse train generated by a mode-locked laser. Much work has been devoted to this last mechanism, which was developed around the turn of the 21st century and ultimately led to one half of the Nobel Prize in Physics being shared by John L.

Mach–Zehnder interferometer

The Mach–Zehnder interferometer is a device used to determine the relative phase shift variations between two collimated beams derived by splitting light from a single source. The interferometer has been used, among other things, to measure phase shifts between the two beams caused by a sample or a change in length of one of the paths. The apparatus is named after the physicists Ludwig Mach (the son of Ernst Mach) and Ludwig Zehnder; Zehnder's proposal in an 1891 article was refined by Mach in an 1892 article.

Faraday effect

The Faraday effect or Faraday rotation, sometimes referred to as the magneto-optic Faraday effect (MOFE), is a physical magneto-optical phenomenon. The Faraday effect causes a polarization rotation which is proportional to the projection of the magnetic field along the direction of the light propagation. Formally, it is a special case of gyroelectromagnetism obtained when the dielectric permittivity tensor is diagonal. This effect occurs in most optically transparent dielectric materials (including liquids) under the influence of magnetic fields.