Waveguide-integrated high-performance magneto-optical isolators and circulators on silicon nitride platforms

Yan, Wei; Yang, Yucong; Liu, Shuyuan; Zhang, Yan; Xia, Shuang; Kang, Tongtong; Yang, Wen-Lin; Qin, Jun; Deng, Longjiang; Bi, Lei

doi:10.1364/optica.408458

Cited by 89 publications

(61 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major drawback of Rayleigh's optical isolators is to work in an optimum way only for one specific input light polarization that should be known in advance. The same is true also for most recent magneto-optics-based isolators developed in integrated photonics, where either the TM or the TE polarization is generally being addressed (see [2][3][4][5][6] and references therein).…”

Section: Introductionmentioning

confidence: 75%

Polarization-independent optical isolator in a Sagnac-type configuration

Al-Mahmoud

Dimova²,

Hristova³

et al. 2021

Appl. Opt.

View full text Add to dashboard Cite

We propose a polarization-independent optical isolator that does not use walk-off between the two orthogonal polarizations. The design is based on two Faraday rotators in combination with two half-wave plates in a closed, Sagnac-interferometer-like, configuration. An experimental prototype is tested successfully under variation of the input light polarization state with isolation level between 43 dB and 50 dB for all input polarizations (linear, circular, or elliptical).

show abstract

Section: Introductionmentioning

confidence: 75%

Polarization-independent optical isolator in a Sagnac-type configuration

Al-Mahmoud

Dimova²,

Hristova³

et al. 2021

Appl. Opt.

View full text Add to dashboard Cite

show abstract

“…For example, the realization of bi-gyrotropic materials allows controlling the transmission intensity/phase for both the electric and magnetic fields of the incident electromagnetic wave by applying magnetic fields, offering a higher degree of freedom for polarization control in active metasurfaces. The bi-gyrotropic nature of the metasurfaces also enables independent design of the MO effects, such as TMOKE for p-and s-polarizations that may be used for the design of polarization-independent on-chip MO isolators or circulators 40 , nonreciprocal metasurfaces for vectoral magnetic field sensing 41 , or biomedical sensing applications 42,43 . Artificial ε or µ tensors can also significantly extend the frequency range of magneto-optical properties in conventional magnetic materials that are inherently tied to the band structure or magnetic properties of the material.…”

Section: Discussionmentioning

confidence: 99%

Observation of optical gyromagnetic properties in a magneto-plasmonic metamaterial

Yang

Liu²,

Wang

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Metamaterials with artificial optical properties have attracted significant research interest. In particular, artificial magnetic resonances in non-unity permeability tensor at optical frequencies in metamaterials have been reported. However, only non-unity diagonal elements of the permeability tensor have been demonstrated to date. A gyromagnetic permeability tensor with non-zero off-diagonal elements has not been observed at the optical frequencies. Here we report the observation of gyromagnetic properties in the near-infrared wavelength range in a magneto-plasmonic metamaterial. The non-zero off-diagonal permeability tensor element causes the transverse magneto-optical Kerr effect (TMOKE) under s-polarized incidence that otherwise vanishes if the permeability tensor is not gyromagnetic. By retrieving the permeability tensor elements from reflection, transmission, and TMOKE spectra, we show that the effective off-diagonal permeability tensor elements reach the 10-3 level at the resonance wavelength (~900 nm) of the split-ring resonators that is at least two orders of magnitude higher than that of magneto-optical materials at the same wavelength. The artificial gyromagnetic permeability is attributed to the change in the local electric field direction modulated by the split-ring resonators. Our study demonstrates the possibility of engineering the permeability and permittivity tensors in metamaterials at arbitrary frequencies, thereby promising a variety of applications of next-generation nonreciprocal photonic devices, magneto-plasmonic sensors, and active metamaterials.

show abstract

“…Magneto-optics can be employed as spectroscopy tool 1 – 4 , microscopy tool 5 – 8 , tool to investigate ultrafast magnetization dynamics 9 – 12 , etc. The MO effects are used in many applications, such as holographic displays 13 – 15 , optical isolators 16 – 18 and photonic crystals 19 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Band structure analysis of the magneto-optical effect in bcc Fe

Stejskal

Veis

Hamrle

2021

Sci Rep

View full text Add to dashboard Cite

Magneto-optical effects are among the basic tools for characterization of magnetic materials. Although these effects are routinely calculated by the ab initio codes, there is very little knowledge about their origin in the electronic structure. Here, we analyze the magneto-optical effect in bcc Fe and show that it originates in avoided band-crossings due to the spin-orbit interaction. Therefore, only limited number of bands and k-points in the Brillouin zone contribute to the effect. Furthermore, these contributions always come in pairs with opposite sign but they do not cancel out due to different band curvatures providing different number of contributing reciprocal points. The magneto-optical transitions are classified by the dimensionality of the manifold that is formed by the hybridization of the generating bands as one- or two-dimensional, and by the position relative to the magnetization direction as parallel and perpendicular. The strongest magneto-optical signal is provided by two-dimensional parallel transitions.

show abstract

Waveguide-integrated high-performance magneto-optical isolators and circulators on silicon nitride platforms

Cited by 89 publications

References 65 publications

Polarization-independent optical isolator in a Sagnac-type configuration

Polarization-independent optical isolator in a Sagnac-type configuration

Observation of optical gyromagnetic properties in a magneto-plasmonic metamaterial

Band structure analysis of the magneto-optical effect in bcc Fe

Contact Info

Product

Resources

About