Ultra-low loss compact active TM mode pass polarizer using phase change material in silicon waveguide
- Title
- Ultra-low loss compact active TM mode pass polarizer using phase change material in silicon waveguide
- Creator
- Nishanthika V.; Natesan A.; Sugesh R G J.; Siva R.
- Description
- An active low-loss transverse magnetic (TM) pass polarizer, based on the phase change material (Ge2Sb2Te5), is proposed. The proposed polarizer is based on silicon-on-insulator technology that consists of a silicon waveguide that incorporates a thin layer of Si3N4 placed in-between GST. Enhancing the interaction between light and GST is achieved by strategically placing a double-layer GST adjacent to the slot waveguide. The polarizers tunability, on the other hand, depends on the shift in the refractive index (RI) of GST as it transitions between its crystalline and amorphous phases. By optimizing the structure, the polarizer exhibits negligible loss for both modes in the amorphous phase, and with the change of phase to crystalline, the loss of TE mode is more than 8 dB. In contrast, the loss of TM is less than 0.05 dB with a high ER of 21.82 dB, propagation length of 79.89 m and Figure of merit reaches up to 108 at 1550 nm. Due to the combination of these performance parameters, the suggested active TM pass polarizer is an appealing and effective device for various photonic applications. In addition, the fabrication technique of the proposed active TM pass polarizer is explained. 2024 IOP Publishing Ltd.
- Source
- Journal of Optics (United Kingdom), Vol-26, No. 6
- Date
- 2024-01-01
- Publisher
- Institute of Physics
- Subject
- Ge2Sb2Te5; photonic integrated circuit; silicon photonics; silicon waveguide; TM pass polarizer
- Coverage
- Nishanthika V., Department of Electronics and Communication Engineering, Thiagarajar College of Engineering and Technology, Tamil Nadu, Madurai, India; Natesan A., Department of Electronics and Communication Engineering, Thiagarajar College of Engineering and Technology, Tamil Nadu, Madurai, India; Sugesh R G J., Department of Electronics and Communication Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Siva R., Department of Electronics and Communication Engineering, Thiagarajar College of Engineering and Technology, Tamil Nadu, Madurai, India
- Rights
- Restricted Access
- Relation
- ISSN: 20408978
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Nishanthika V.; Natesan A.; Sugesh R G J.; Siva R., “Ultra-low loss compact active TM mode pass polarizer using phase change material in silicon waveguide,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/13079.