Design of a high-modulation-depth, low-energy silicon modulator based on coupling tuning in a resonance-split microring

Wang, Tao; Xu, Mu; Li, Fēi; Wu, Jiayang; Zhou, Linjie; Su, Yikai

doi:10.1364/josab.29.003047

Cited by 12 publications

(4 citation statements)

References 51 publications

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“…The measured TE and TM polarized transmission spectra of the uniformly GO-coated MRR are shown in Figures 4(a-i) and (a-ii), respectively, while the transmission spectra of the patterned MRR are shown in Figures 4(b-i) and (b-ii), all measured with the same doped silica MRR at a CW power of ~0 dBm. The resulting Q factors [31][32][33] and extinction ratios [34,35] are shown in Figure 5(a). The uncoated MRR had high extinction ratios (> 15 dB) and relatively high Q factors (180,000) (although significantly less than for buried waveguides) for both polarizations.…”

Section: Go-coated Polarization-selective Mrrsmentioning

confidence: 99%

Graphene oxide (GO) 2D layered films for high efficiency integrated polarizers in ring resonators and waveguides

Moss¹,

Wu²,

Jiao³

et al. 2020

Preprint

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<p>Polarization selective devices, such as polarizers and polarization selective resonant cavities (e.g., gratings and ring resonators), are core components for polarization control in optical systems and find wide applications in polarization-division-multiplexing, coherent optical detection, photography, liquid crystal display, and optical sensing. In this paper, we demonstrate integrated waveguide polarizers and polarization-selective micro-ring resonators (MRRs) incorporated with graphene oxide (GO). We achieve highly precise control of the placement, thickness, and length of the GO films coated on integrated photonic devices by using a solution-based, transfer-free, and layer-by-layer GO coating method followed by photolithography and lift-off processes. The latter overcomes the layer transfer fabrication limitations of 2D materials and represent a significant advance towards manufacturing integrated photonic devices incorporated with 2D materials. We measure the performance of the waveguide polarizer for different GO film thicknesses and lengths versus polarization, wavelength, and power, achieving a very high polarization dependent loss (PDL) of ~ 53.8 dB. For GO-coated integrated MRRs, we achieve an 8.3-dB polarization extinction ratio between the TE and TM resonances, with the extracted propagation loss showing good agreement with the waveguide results. Furthermore, we present layer-by-layer characterization of the linear optical properties of 2D layered GO films, including detailed measurements that conclusively determine the material loss anisotropy of the GO films as well as the relative contribution of film loss anisotropy versus polarization-dependent mode overlap, to the device performance. These results offer interesting physical insights and trends of the layered GO films from monolayer to quasi bulk like behavior and confirm the high-performance of integrated polarization selective devices incorporated with GO films.</p>

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Section: Go-coated Polarization-selective Mrrsmentioning

confidence: 99%

Graphene oxide (GO) 2D layered films for high efficiency integrated polarizers in ring resonators and waveguides

Moss¹,

Wu²,

Jiao³

et al. 2020

Preprint

Self Cite

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“…Nevertheless, the relatively low Kerr nonlinearity as compared with silicon and silicon nitride limits the performance of nonlinear photonic devices made from high-index doped silica glass. The implementation of hybrid devices with advanced materials having high Kerr nonlinearity and low TPA effect could open up a way towards overcoming this limitation [29][30][31]. Owing to the ease of preparation as well as the tunability of its material properties, graphene oxide (GO) has become a rising star of the graphene family [32,33].…”

Section: Introductionmentioning

confidence: 99%

Enhanced four-wave mixing in hybrid integrated waveguides with graphene oxide

Yang

et al. 2019

2D Photonic Materials and Devices II

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Enhanced four-wave mixing in hybrid integrated waveguides with graphene oxide," Proc. ABSTRACTOwing to the ease of preparation as well as the tunability of its material properties, graphene oxide (GO) has become a rising star of the graphene family. In our previous work, we found that GO has an ultra-high Kerr nonlinear optical response -several orders of magnitude higher than that of silica and even silicon. Moreover, as compared with graphene, GO has much lower linear loss as well as nonlinear loss (two photon absorption (TPA)), arising from its large bandgap (2.4~3.1 eV) being more than double the photon energy in the telecommunications band. Here, we experimentally demonstrate enhanced four-wave mixing (FWM) in hybrid integrated waveguides coated with GO films. Owing to strong mode overlap between the integrated waveguides and the high Kerr nonlinearity GO films as well as low linear and nonlinear loss, we demonstrate significant enhancement in the FWM efficiency. We achieve up to ~9.5-dB enhancement in the conversion efficiency for a 1.5-cm-long waveguide with 2 layers of GO. We perform FWM measurements at different pump powers, wavelength detuning, GO film lengths and numbers of layers. The experimental results verify the effectiveness of introducing GO films into integrated photonic devices in order to enhance the performance of nonlinear optical processes.

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“…This can be achieved by either putting reflective elements into a ring resonator or using coupled resonators. For instance, placing a reflective element in the ring waveguide to induce resonance splitting can lead to applications like tunable fast and slow light [6,7], novel modulation schemes [8], single sideband generation [9], tunable Fano resonances [10], spectral tuning [11], chirality and exceptional point [12,13], and an optical analogue to electromagnetically induced transparency (EIT) [14]. The use of coupled resonators to induce resonance splitting also shows many applications, including signal processing [15], coupled-resonator-induced transparency [16], differential equation solvers [17], photonic molecules [18,19], optical signal processing [20], etc.…”

Section: Introductionmentioning

confidence: 99%

Backcoupling manipulation in silicon ring resonators

Li¹,

Bogaerts²

2018

Photon. Res.

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In this paper, we theoretically propose and experimentally demonstrate the manipulation of a novel degree of freedom in ring resonators, which is the coupling from the clockwise input to the counterclockwise propagating mode (and vice versa). We name this mechanism backcoupling, in contrast with the normal forward-coupling of a directional coupler. It is well known that internal reflections will cause peak splitting in a ring resonator. Our previous research demonstrated that the peak asymmetry will be strongly influenced by the backcoupling. Thus, it is worth manipulating the backcoupling in order to gain full control of a split resonance for the benefit of various resonance-splitting-based applications. While it is difficult to directly manipulate the backcoupling of a conventional directional coupler, here we design a circuit explicitly for manipulating the backcoupling. It can be potentially developed for applications such as single sideband filter, resonance splitting elimination, Fano resonance, and ultrahigh-Q and finesse.

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Design of a high-modulation-depth, low-energy silicon modulator based on coupling tuning in a resonance-split microring

Cited by 12 publications

References 51 publications

Graphene oxide (GO) 2D layered films for high efficiency integrated polarizers in ring resonators and waveguides

Graphene oxide (GO) 2D layered films for high efficiency integrated polarizers in ring resonators and waveguides

Enhanced four-wave mixing in hybrid integrated waveguides with graphene oxide

Backcoupling manipulation in silicon ring resonators

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