Monolithic on-chip nonreciprocal photonics based on magneto-optical thin films

Hu, Juejun; Sun, Xueyin; Du, Qingyang; Onbaşlı, Mehmet C.; Ross, Caroline A.

doi:10.1117/12.2209658

Cited by 3 publications

(2 citation statements)

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“…MO devices may be based on mode conversion via the Faraday effect [14][15][16] as used in bulk isolators, but the birefringence of on-chip waveguides favors devices based instead on a nonreciprocal phase shift (NRPS), including ring resonators, multimode interferometers, and Mach-Zehnder interferometers (MZIs) [17][18][19][20][21][22][23][24][25] . The best-performing MO materials in the near-IR communications band are yttrium iron garnets substituted with Bi or Ce to increase their Faraday rotation [26][27][28][29][30][31][32] . Integration of garnet into silicon PICs has been accomplished via wafer bonding 33 and via monolithic integration 34,35 .…”

Section: Introductionmentioning

confidence: 99%

Filling in the missing link: monolithic optical isolators on silicon with high performance, broadband operation, and polarization diversity

Zhang

et al. 2020

Photonic and Phononic Properties of Engineered Nanostructures X

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On-chip optical isolators constitute an essential building block for photonic integrated circuits. Monolithic magnetooptical isolators on silicon, while featuring unique benefits such as scalable integration and processing, fully passive operation, large dynamic range, and simple device architecture, had been limited by their far inferior performances compared to their bulk counterparts. Here we discuss our recent work combining garnet material development and isolator device design innovation, which leads to a monolithic optical isolator with an unprecedented low insertion loss of 3 dB and an isolation ratio up to 40 dB. To further overcome the bandwidth and polarization limitations, we demonstrated broadband optical isolators capable of operating for both TM and TE modes. These results open up exciting opportunities for scalable integration of nonreciprocal optical devices with chip-scale photonic circuits.

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Section: Introductionmentioning

confidence: 99%

Filling in the missing link: monolithic optical isolators on silicon with high performance, broadband operation, and polarization diversity

Zhang

et al. 2020

Photonic and Phononic Properties of Engineered Nanostructures X

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“…Systems for magneto-optical devices should offer on the one hand non-reciprocity which means that the time inverse symmetry is broken and on the other hand they should exhibit a memory effect. In the case of ferromagnetic structures the data can be memorized (Hu et al, 2016). Therefore, it is important to overcome a superparamagnetic behavior.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Characteristics of Ni-Filled Luminescent Porous Silicon

et al. 2019

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The aim of the presented work is to combine luminescent porous silicon (PSi) with a ferromagnetic metal (Ni) to modify on the one hand the photoluminescence by the presence of metal deposits and on the other hand to influence the optical properties by an external magnetic field. The optical properties are investigated especially with respect to the wavelength-shift of the photoluminescence due to the metal filling. With increasing metal deposits within PSi the photoluminescence peak is blue-shifted and furthermore an increase of the intensity is observed. Photoluminescence spectra of bare PSi show a maximum around 620 nm whereas in the case of Ni filled samples the peak is blue-shifted to around 580 nm for a deposition time of 15 min. Field dependent magnetic measurements performed with an applied field parallel and perpendicular to the surface, respectively, show a magnetic anisotropy which is in agreement with a thin film. This film-like behavior is caused by the interconnected Ni structures due to the branched porous silicon morphology. The coercivity increases with increasing metal deposition from about 150 Oe to about 450 Oe and also the magnetic anisotropy is enhanced with the growth of metal deposits. Within this work the influence of the magnetic metal filling on the optical properties and the magnetic characterization of the nanocomposites are discussed. The presented systems give not only rise to optoelectronics applications but also to magneto optical integrated devices.

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Silicon-based hybrid demultiplexer for wavelength- and mode-division multiplexing

Tan

Wang

et al. 2018

Opt. Lett.

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A silicon-based hybrid demultiplexer for wavelength-division multiplexing (WDM) and mode-division multiplexing (MDM) is proposed and demonstrated by integrating an M-channel-mode demultiplexer and N-channel WDM filters based on microring resonators (MRRs) with box-like responses. For the mode demultiplexer, the 2k-th output port is connected with the (2k+1)-th output port through the bus waveguide for the k-th MRR array, so that each MRR-based optical filter works bi-directionally and provides two drop ports. As an example, a 32-channel hybrid MDM-WDM demultiplexer is realized by integrating a 4-channel mode demultiplexer based on dual-core adiabatic tapers and two bi-directional MRR-based WDM filters with eight wavelength-channels. For the fabricated hybrid demultiplexer, the excess loss is 0.5-5 dB, the intermode cross talk is -16.5 to -23.5 dB, and the cross talks between the adjacent and nonadjacent wavelength channels are about -25 dB and -35 dB, respectively.

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Monolithic on-chip nonreciprocal photonics based on magneto-optical thin films

Cited by 3 publications

References 50 publications

Filling in the missing link: monolithic optical isolators on silicon with high performance, broadband operation, and polarization diversity

Filling in the missing link: monolithic optical isolators on silicon with high performance, broadband operation, and polarization diversity

Magnetic Characteristics of Ni-Filled Luminescent Porous Silicon

Silicon-based hybrid demultiplexer for wavelength- and mode-division multiplexing

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