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標題: 利用次波長光柵與槽狀波導實現極化分光器
Polarization beam splitter based on sub-wavelength grating and slot waveguide
作者: 吳昌玹
Chang-Xuan Wu
關鍵字: 極化光分離器;光波導;多模干涉;次波長光柵;槽狀波導;擴增型低折射率波導;polarized light splitter;optical waveguide;multimode interference;sub-wavelength grating;slot waveguide;Augmented Low Index Guiding
引用: [1] wikipedia 電磁輻射 Electromagnetic radiation, EM radiation or EMR (2018) [2] L.B. Soldano, E.C.M. Pennings,'Optical multi-mode interference devices based on self-imaging: Principles and applications' IEEE, Journal of Light wave Technology, 13-4 (1995). [3] ZHENGSEN RUAN, LI SHEN, SHUANG ZHENG, AND JIAN WANG, 'Subwavelength grating slot (SWGS)waveguide on silicon platform' Optical Society of America, OPTICS EXPRESS Vol. 25, No. 15 (2017) [4] Robert Halir, Pavel Cheben, Jose Manuel Luque-Gonzalez,Jose Darıo Sarmiento-Merenguel, Jens H. Schmid, Gonzalo Wanguemert-Perez, Dan-Xia Xu, Shurui Wang, Alejandro Ortega-Monux, and Inigo Molina-Fernandez, ' Ultra-broadband nanophotonic beamsplitter using an anisotropic sub-wavelength metamaterial',Wiley-VCH Verlag GmbH & Co. KGaA Weinheim ,Laser & Photonics Reviews, 10, No. 6, 1039–1046 (2016) [5] Masayuki Okuno, Akio Sugita, Kaname Jinguji, and Masao Kawachi, 'Birefringence Control of Silica Waveguides on Si and Its Application to a Polarization-Beam Splitted Switch' IEEE, JOURNAL OF LIGHTWAVE. TECHNOLOGY, VOL. 12, NO. 4 (1994) [6] Min-Cheol Oh, Myung-Hyun Lee and Hyung-Jong Lee, 'TE-pass and TM-pass waveguide polarisers with buried birefringent polymer' IEEE Xplore, ELECTRONICS LETTERS Vol. 35 No. 6 (1999) [7] Hiroshi Fukuda, Koji Yamada, Tai Tsuchizawa, Toshifumi Watanabe, Hiroyuki Shinojima and Sei-ichi Itabashi, 'Ultrasmall polarization splitter based on silicon wire waveguides' Optical Society of America, OPTICS EXPRESS Vol. 14, No. 25 (2006) [8] R. F. OULTON, V. J. SORGER, D. A. GENOV, D. F. P. PILE AND X. ZHANG, 'A hybrid plasmonic waveguide for subwavelength confinement and long-range propagation' nature, nature photonics, VOL 2, No.496 (2008) [9] Qiang Li,1 Yi Song, Gan Zhou, Yikai Su, and Min Qiu, 'Asymmetric plasmonic-dielectric coupler with short coupling length, high extinction ratio, and low insertion loss' Optical Society of America, OPTICS LETTERS Vol. 35, No. 19 (2010) [10] Xiaowei Guan, Hao Wu, Yaocheng Shi, and Daoxin Dai, 'Extremely small polarization beam splitter based on a multimode interference coupler with a silicon hybrid plasmonic waveguide' Optical Society of America OPTICS LETTERS Vol. 39, No. 2 (2014) [11] Sangsik Kim and Minghao Qi, 'Copper nanorod array assisted silicon waveguide polarization beam splitter' Optical Society of America OPTICS EXPRESS Vol. 22, No. 8 (2014) [12] Ran Hao, Senior Member, Wei Du, Er-Ping Li, Fellow, and Hong-Sheng Chen, 'Graphene Assisted TE/TM-Independent Polarizer Based on Mach–Zehnder Interferometer' IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 27, NO. 10, (2015) [13] X. SUN, M. Z. ALAM, J. S. AITCHISON, AND M. MOJAHEDI, 'Compact and broadband polarization beam splitter based on a silicon nitride augmented low-index guiding structure' OSA Optics Letters Vol. 41, No. 1 (2016)
光積體電路由許多的元件構成,如半導體大型集成積體電路一般,諸如調變器、開關、分光器、傳發器、偵測器、放大器等,而本論文主要聚焦於設計極化光分離器,以擴增型低折射率波導為基礎,利用多模干涉與次波長光柵結構;槽狀波導結構提出高效能之極化光分離器。利用次波長光柵結構的優點可以將元件進一步減少1400nm而TE與TM消光比約為13dB;19dB,插入損耗分別為3dB與1.5dB。而槽狀波導則是利用結構特性,形成一高場強之特殊模態,將TE限制於其中進行分光,而TE與TM消光比皆12 dB以上,插入損耗分別為3.2;2 dB。如要進一步提高消光比及減少插入損耗,可以多嘗試其他更高折射率之介電材材料之方向研究,以實現集成積體光電路之目標。

The photonic integrated circuit consists of many components, such as large integrated circuits semiconductor, like modulators, switches, beam splitters, transmitters, detectors, amplifiers, etc., in this paper focuses on designing Polarization Beam Splitter (PBS). The splitter is based on an Augmented Low Index Guiding(ALIG), and using multimode interference and a sub-wavelength grating structure; slot waveguide structure builds high-performance polarization beam splitter. using the advantages of the sub-wavelength grating structure, the device can be further reduced to 1400 nm and the TE and TM extinction ratio is about 13 dB; 19 dB, the insertion loss is 3 dB and 1.5 dB, respectively. Utilization slot waveguide structural characteristics to form a super mode with a strength field, confining the TE for polarization splitting, and the TE and TM extinction ratios are both above 12 dB, and the insertion loss is 3.2; 2 dB, respectively. If you want to further increase the extinction ratio and reduce the insertion loss, we can try other higher refractive index dielectric materials to achieve the goal of large photonic integrated circuit.
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