On-chip arbitrary-mode spot size conversion
Manipulating on-chip optical modes via components in analogy with free-space devices provides intuitional light control, and this concept has been adopted to implement single-lens–assisted spot size conversion using integrated device. However, the reported schemes have been demonstrated only for fun...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2020-08-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2020-0328 |
| _version_ | 1818723281223548928 |
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| author | Qi Wei Yu Yu Zhang Xinliang |
| author_facet | Qi Wei Yu Yu Zhang Xinliang |
| author_sort | Qi Wei |
| collection | DOAJ |
| description | Manipulating on-chip optical modes via components in analogy with free-space devices provides intuitional light control, and this concept has been adopted to implement single-lens–assisted spot size conversion using integrated device. However, the reported schemes have been demonstrated only for fundamental mode, while high-order or irregular modes are preferred in specific applications. The 4-f system is widely used in Fourier optics for optical information processing. Under the inspiration of the 4-f system and the beam expander in bulk optics, a spot size converter (SSC) with two metamaterial-based graded-index waveguides is proposed and demonstrated. The proposed device is capable of widening an arbitrary mode while preserving its profile shape. Compared with conventional SSC using adiabatic taper, the footprint can be reduced by 91.5% under a same intermode crosstalk. Experimentally, an expansion ratio of five is demonstrated for regular modes. Furthermore, for an irregular mode, the functionality is numerically verified without structure modification. This work offers a universal solution to on-chip spot size conversion and may broaden the on-chip application prospects of Fourier optics. |
| first_indexed | 2024-12-17T21:08:01Z |
| format | Article |
| id | doaj.art-fb8ffc0d76a9467689f997d45d8177f7 |
| institution | Directory Open Access Journal |
| issn | 2192-8606 2192-8614 |
| language | English |
| last_indexed | 2024-12-17T21:08:01Z |
| publishDate | 2020-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-fb8ffc0d76a9467689f997d45d8177f72022-12-21T21:32:32ZengDe GruyterNanophotonics2192-86062192-86142020-08-019144365437210.1515/nanoph-2020-0328nanoph-2020-0328On-chip arbitrary-mode spot size conversionQi Wei0Yu Yu1Zhang Xinliang2Wuhan National Laboratory for Optoelectronics and School of Optical and Electrical Information, Huazhong University of Science and Technology, Wuhan430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan430074, ChinaWuhan National Laboratory for Optoelectronics and School of Optical and Electrical Information, Huazhong University of Science and Technology, Wuhan430074, ChinaManipulating on-chip optical modes via components in analogy with free-space devices provides intuitional light control, and this concept has been adopted to implement single-lens–assisted spot size conversion using integrated device. However, the reported schemes have been demonstrated only for fundamental mode, while high-order or irregular modes are preferred in specific applications. The 4-f system is widely used in Fourier optics for optical information processing. Under the inspiration of the 4-f system and the beam expander in bulk optics, a spot size converter (SSC) with two metamaterial-based graded-index waveguides is proposed and demonstrated. The proposed device is capable of widening an arbitrary mode while preserving its profile shape. Compared with conventional SSC using adiabatic taper, the footprint can be reduced by 91.5% under a same intermode crosstalk. Experimentally, an expansion ratio of five is demonstrated for regular modes. Furthermore, for an irregular mode, the functionality is numerically verified without structure modification. This work offers a universal solution to on-chip spot size conversion and may broaden the on-chip application prospects of Fourier optics.https://doi.org/10.1515/nanoph-2020-0328integrated photonicsmetamaterialsspot size conversion |
| spellingShingle | Qi Wei Yu Yu Zhang Xinliang On-chip arbitrary-mode spot size conversion Nanophotonics integrated photonics metamaterials spot size conversion |
| title | On-chip arbitrary-mode spot size conversion |
| title_full | On-chip arbitrary-mode spot size conversion |
| title_fullStr | On-chip arbitrary-mode spot size conversion |
| title_full_unstemmed | On-chip arbitrary-mode spot size conversion |
| title_short | On-chip arbitrary-mode spot size conversion |
| title_sort | on chip arbitrary mode spot size conversion |
| topic | integrated photonics metamaterials spot size conversion |
| url | https://doi.org/10.1515/nanoph-2020-0328 |
| work_keys_str_mv | AT qiwei onchiparbitrarymodespotsizeconversion AT yuyu onchiparbitrarymodespotsizeconversion AT zhangxinliang onchiparbitrarymodespotsizeconversion |