Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter
In this paper, a graded-index strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$</tex-math> </inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> optical PN phase shifter with mul...
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2018-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/8528355/ |
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| author | Darpan Mishra Ramesh Kumar Sonkar |
| author_facet | Darpan Mishra Ramesh Kumar Sonkar |
| author_sort | Darpan Mishra |
| collection | DOAJ |
| description | In this paper, a graded-index strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$</tex-math> </inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> optical PN phase shifter with multiple strained layers has been proposed for high speed data modulation at 1550 nm with low device footprint. The quasi-vectorial finite difference method, non-local empirical pseudopotential method and the Payne-Lacey model has been used to analyze the proposed device. A phase shift of 122<inline-formula> <tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/mm, V<inline-formula><tex-math notation="LaTeX">$_\pi$ </tex-math></inline-formula>L<inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula> of 0.74 V.cm, and insertion loss of 4 dB at 5 V reverse bias with a 3-dB modulation bandwidth of 27.5 GHz has been obtained for a 500 nm × 250 nm cross-section rib waveguide with 50 nm slab. A 15 <inline-formula><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/mm increase in phase shift and 0.08 V.cm decrease in V<inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula>L <inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula> has been observed when the junction is shifted by 60 nm towards the N side. |
| format | Article |
| id | doaj-art-14ccea3826124a4ca92eb18e211d94e6 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-14ccea3826124a4ca92eb18e211d94e62025-08-20T03:16:04ZengIEEEIEEE Photonics Journal1943-06552018-01-0110611410.1109/JPHOT.2018.28800778528355Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase ShifterDarpan Mishra0https://orcid.org/0000-0001-9248-2008Ramesh Kumar Sonkar1Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Assam, IndiaDepartment of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Assam, IndiaIn this paper, a graded-index strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$</tex-math> </inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> optical PN phase shifter with multiple strained layers has been proposed for high speed data modulation at 1550 nm with low device footprint. The quasi-vectorial finite difference method, non-local empirical pseudopotential method and the Payne-Lacey model has been used to analyze the proposed device. A phase shift of 122<inline-formula> <tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/mm, V<inline-formula><tex-math notation="LaTeX">$_\pi$ </tex-math></inline-formula>L<inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula> of 0.74 V.cm, and insertion loss of 4 dB at 5 V reverse bias with a 3-dB modulation bandwidth of 27.5 GHz has been obtained for a 500 nm × 250 nm cross-section rib waveguide with 50 nm slab. A 15 <inline-formula><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/mm increase in phase shift and 0.08 V.cm decrease in V<inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula>L <inline-formula><tex-math notation="LaTeX">$_\pi$</tex-math></inline-formula> has been observed when the junction is shifted by 60 nm towards the N side.https://ieeexplore.ieee.org/document/8528355/Graded-indexphase shiftersilicon-germanium |
| spellingShingle | Darpan Mishra Ramesh Kumar Sonkar Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter IEEE Photonics Journal Graded-index phase shifter silicon-germanium |
| title | Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter |
| title_full | Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter |
| title_fullStr | Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter |
| title_full_unstemmed | Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter |
| title_short | Design and Analysis of a Graded-Index Strained Si<inline-formula><tex-math notation="LaTeX">$_{1-x}$ </tex-math></inline-formula>Ge<inline-formula><tex-math notation="LaTeX">$_x$</tex-math></inline-formula> Optical PN Phase Shifter |
| title_sort | design and analysis of a graded index strained si inline formula tex math notation latex 1 x tex math inline formula ge inline formula tex math notation latex x tex math inline formula optical pn phase shifter |
| topic | Graded-index phase shifter silicon-germanium |
| url | https://ieeexplore.ieee.org/document/8528355/ |
| work_keys_str_mv | AT darpanmishra designandanalysisofagradedindexstrainedsiinlineformulatexmathnotationlatex1xtexmathinlineformulageinlineformulatexmathnotationlatexxtexmathinlineformulaopticalpnphaseshifter AT rameshkumarsonkar designandanalysisofagradedindexstrainedsiinlineformulatexmathnotationlatex1xtexmathinlineformulageinlineformulatexmathnotationlatexxtexmathinlineformulaopticalpnphaseshifter |