Phase modulators in hybrid silicon and lithium niobate thin films

Li, Qingyun; Zhu, Houbin; Zhang, Honghu; Cai, L. Z.; Hu, Hui

doi:10.1364/ome.452404

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…Ultimately, the design of a waveguide with higher optical power confinement and compact mode area will lead to a more significant overlap factor (i.e. electrostatic and optical field overlapping), thereby reducing the half-wave voltage (V π ) [27]. Figure 5 shows the relationship between the effective mode area of TE 0 and TM 0 with W SRN for different R values.…”

Section: Resultsmentioning

confidence: 99%

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Numerical analysis of a strip-loaded silicon rich nitride-thin film lithium niobate hybrid waveguides

Meetei¹,

Son²,

Park³

et al. 2023

J. Opt.

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Hybrid integration of silicon rich nitride and lithium niobate on insulator (SRN-LNOI) is an emerging material platform for photonic integrated circuits (PIC). In this paper, we present a systematic numerical investigation of the mode properties of a strip-loaded SRN-LNOI hybrid waveguide at 1550 nm wavelength using the full-vectorial finite difference method. Considering the anisotropic nature of the lithium niobate (LN) crystal, the effective refractive indices of the transverse electric (TE) and transverse magnetic (TM) modes of strip-loaded SRN-LN hybrid waveguides were analyzed. The single-mode condition, zero-birefringence, effective mode area, and power distribution in terms of the geometrical parameters of the strip-loaded SRN-LN hybrid waveguide are discussed in detail. Furthermore, the optical power transmission in both straight and bent waveguides, as well as the different characteristics of the optical power confinement of the fundamental modes in the SRN and LN layers were analyzed. This study provides useful information for designing high-performance photonic devices on a hybrid SRN-LNOI platform for future PIC applications.

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Section: Resultsmentioning

confidence: 99%

“…a larger footprint. In addition, a hybrid Si-LNOI platform was reported with low half-wave voltage and better optical power confinement [27]. Nevertheless, the high propagation loss (42 dB cm −1 ) of Si-LN waveguide remains a challenging issue [28].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of a strip-loaded silicon rich nitride-thin film lithium niobate hybrid waveguides

Meetei¹,

Son²,

Park³

et al. 2023

J. Opt.

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“…Table 1 and 2 summarize the progress of different TFLN modulators with the MZI structure. [ 5,6,12,15,26–107 ] Figure summarizes the half‐wave voltage, device length, and bandwidth of etched and non‐etched TFLN modulators. Both these two kinds of modulators can realize a very high bandwidth.…”

Section: Mzi‐based Tfln Modulatormentioning

confidence: 99%

Compact and Efficient Thin‐Film Lithium Niobate Modulators

Chen,

Gao,

Lin

et al. 2023

Advanced Photonics Research

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Thin‐film lithium niobate (TFLN) modulators have garnered significant attention in the field of integrated photonics due to their ability to manipulate light. Numerous TFLN modulators have been demonstrated over the past few years, with speed records consistently being broken. However, due to the low refractive index contrast and anisotropic properties of TFLN, modulators based on this material feature larger device sizes and lower efficiency. A more compact and efficient modulator is important, as it is required for future dense integration and low power consumption applications. There have been some reports on how to reduce device size, and research is ongoing. A comprehensive summary can help individuals understand the current state of research and existing problems. In this review, we provide an overview of recent advancements in TFLN modulator technology, focusing on compactness and efficiency. Herein, various types of modulators, such as the Mach–Zehnder interferometer, Michelson interferometer, resonator cavity, and Z‐cut type modulators, are discussed. Moreover, potential improvement strategies and applications for compact and efficient TFLN modulators in advanced photonic systems are explored. In conclusion, in this review, the recent achievements in compact and efficient TFLN modulators are summarized and their significance in various optoelectronic applications is emphasized.

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“…In recent years, more and more reports based on hybrid silicon-LNOI platform have appeared thanks to advances in manufacturing technology 24 – 29 This platform has great potential for its combining excellent characteristics of two materials: the widespread application of silicon in integrated circuits and its mature preparation and processing technologies, and the unique advantages of lithium niobate among optical materials. Unlike the hybrid silicon nitride-LNOI platform, the larger refractive index difference between silicon and lithium niobate allows light to be stably confined in the high-refractive-index material, which is silicon.…”

Section: Introductionmentioning

confidence: 99%

Compact transverse-magnetic-pass polarizer with a subwavelength grating based on a hybrid silicon-lithium niobate on insulator platform

Zheng,

She,

Shen

et al. 2024

Opt. Eng.

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In this work, a transverse magnetic (TM)-pass polarizer based on subwavelength grating (SWG) on the emerging potential hybrid silicon-LNOI platform is proposed. By integrating silicon material onto the LNOI platform, the optical power of TE 0 and TM 0 modes is judiciously distributed to distinct regions. This design not only effectively blocks the TE 0 mode but also enables low-loss transmission of the TM 0 mode, thereby achieving a balanced manipulation of both polarizations. Due to the strong reflection of TE 0 mode by SWG, a polarizer is realized with a high polarization extinction ratio (PER) and low insertion loss (73 dB and 0.37 dB respectively at 1550 nm) in a compact size (device length is 23.38 μm). Moreover, the PER is beyond 50 dB and the insertion loss is under 0.46 dB in a broad wavelength range of 1525 to 1585 nm.

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Phase modulators in hybrid silicon and lithium niobate thin films

Cited by 7 publications

References 32 publications

Numerical analysis of a strip-loaded silicon rich nitride-thin film lithium niobate hybrid waveguides

Numerical analysis of a strip-loaded silicon rich nitride-thin film lithium niobate hybrid waveguides

Compact and Efficient Thin‐Film Lithium Niobate Modulators

Compact transverse-magnetic-pass polarizer with a subwavelength grating based on a hybrid silicon-lithium niobate on insulator platform

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