Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method
We demonstrate Mach-Zehnder interferometer-based (MZI) athermal photonic devices using the structural compensation method. Unlike previous structural compensation studies that were applied on the thermal sensitive materials such as silicon, this work is implemented in tantalum pentoxide (Ta<sub&g...
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2025-01-01
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| author | Mingjian You Zhenyu Liu Weiren Cheng Xingyu Tang Ning Ding Zhengqi Li Min Wang Li Shen Qiancheng Zhao |
| author_facet | Mingjian You Zhenyu Liu Weiren Cheng Xingyu Tang Ning Ding Zhengqi Li Min Wang Li Shen Qiancheng Zhao |
| author_sort | Mingjian You |
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| description | We demonstrate Mach-Zehnder interferometer-based (MZI) athermal photonic devices using the structural compensation method. Unlike previous structural compensation studies that were applied on the thermal sensitive materials such as silicon, this work is implemented in tantalum pentoxide (Ta<sub>2</sub>O<sub>5</sub>) platform whose thermo-optic coefficient is low. This allows us to achieve ultra-athermalized filters by combining the structural compensation method and the material's own thermo-optic properties. Two types of devices are proposed: the asymmetric Mach-Zehnder interferometer (AMZI) and the ring-coupled Mach-Zehnder interferometer (RMZI). The temperature-dependent wavelength shift (TDWS) of the AMZI device is only 1.98 pm/K around 1550 nm which is 4.6 times smaller than a regular MZI. The TDWS remains below 2.23 pm/K across a broad bandwidth from 1480 nm to 1580 nm. By breaking the linear dependence between the wavelength shift and the temperature change, the maximum resonance drift can be restricted by using a ring-coupled MZI. Owning to Fano effect, the transmission spectrum of the RMZI device exhibits an oscillating behavior when facing temperature changes. This work proves the effectiveness of structural compensation method on an already low thermo-optic photonic platform, paving the way towards realization of ultra-athermal integrated optical filters in a low-loss and CMOS-compatible platform. |
| format | Article |
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| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-ea863c7aac9742dd9938fcd8a4269c932025-02-11T00:00:11ZengIEEEIEEE Photonics Journal1943-06552025-01-011711810.1109/JPHOT.2025.353424410854680Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation MethodMingjian You0https://orcid.org/0009-0001-5541-1144Zhenyu Liu1https://orcid.org/0009-0001-0796-2283Weiren Cheng2https://orcid.org/0009-0001-5270-5227Xingyu Tang3Ning Ding4https://orcid.org/0009-0004-1721-7000Zhengqi Li5Min Wang6https://orcid.org/0000-0003-1478-6051Li Shen7https://orcid.org/0000-0001-7502-3643Qiancheng Zhao8https://orcid.org/0000-0002-0696-8667School of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaWuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, ChinaWe demonstrate Mach-Zehnder interferometer-based (MZI) athermal photonic devices using the structural compensation method. Unlike previous structural compensation studies that were applied on the thermal sensitive materials such as silicon, this work is implemented in tantalum pentoxide (Ta<sub>2</sub>O<sub>5</sub>) platform whose thermo-optic coefficient is low. This allows us to achieve ultra-athermalized filters by combining the structural compensation method and the material's own thermo-optic properties. Two types of devices are proposed: the asymmetric Mach-Zehnder interferometer (AMZI) and the ring-coupled Mach-Zehnder interferometer (RMZI). The temperature-dependent wavelength shift (TDWS) of the AMZI device is only 1.98 pm/K around 1550 nm which is 4.6 times smaller than a regular MZI. The TDWS remains below 2.23 pm/K across a broad bandwidth from 1480 nm to 1580 nm. By breaking the linear dependence between the wavelength shift and the temperature change, the maximum resonance drift can be restricted by using a ring-coupled MZI. Owning to Fano effect, the transmission spectrum of the RMZI device exhibits an oscillating behavior when facing temperature changes. This work proves the effectiveness of structural compensation method on an already low thermo-optic photonic platform, paving the way towards realization of ultra-athermal integrated optical filters in a low-loss and CMOS-compatible platform.https://ieeexplore.ieee.org/document/10854680/Tantalum pentoxideoptical filtersMach-Zehnder interferometerathermalization |
| spellingShingle | Mingjian You Zhenyu Liu Weiren Cheng Xingyu Tang Ning Ding Zhengqi Li Min Wang Li Shen Qiancheng Zhao Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method IEEE Photonics Journal Tantalum pentoxide optical filters Mach-Zehnder interferometer athermalization |
| title | Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method |
| title_full | Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method |
| title_fullStr | Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method |
| title_full_unstemmed | Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method |
| title_short | Athermal Tantalum Pentoxide Mach-Zehnder Interferometers Based on Structural Compensation Method |
| title_sort | athermal tantalum pentoxide mach zehnder interferometers based on structural compensation method |
| topic | Tantalum pentoxide optical filters Mach-Zehnder interferometer athermalization |
| url | https://ieeexplore.ieee.org/document/10854680/ |
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