Abstract：
:This paper presents an ultracompact tunable device for power splitting and switching by tuning the Fermi energy level of monolayer patternless graphene underneath a slotted multimode interference (MMI) coupler operating in the mid-infrared, λ = 9-11 μm. By introducing a high-index silicon slot in the central region of the MMI structure, which can significantly shorten the beat length, the proposed device has an approximately 4.5-fold reduction in device length and a two-fold improvement in power transmission compared with conventional MMI couplers without slotting. The device has a footprint of only 0.30 × 0.65 μm2 (<λ/10), making it the smallest power splitter and switcher. Over the bandwidth of 2 μm, the power transmission of the proposed device is nearly uniform. Extending the operating bandwidth is limited only by the practically achievable Fermi energy of graphene. For the fabrication tolerance, the numerical results show that the relative power variations are lower than 5%, even though the dimension variations are greater than 15%. With its advantages of tunability, compact footprint, and broadband operation, the proposed device is suitable for highly dense photonic integrated circuits.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Huang CC,Sun TCdoi
10.1038/s41598-019-49186-xsubject
Has Abstractpub_date
2019-09-04 00:00:00pages
12756issue
1issn
2045-2322pii
10.1038/s41598-019-49186-xjournal_volume
9pub_type
杂志文章abstract：:Dairy cows are often fed a high-concentrate (HC) diet to meet lactation demands; however, long-term concentrate feeding is unhealthy and decreases milk fat. Therefore, we investigated the effects of liver lipid metabolism on milk fat synthesis. Ten lactating Holstein cows were assigned randomly into HC and LC (low-con...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep44217
更新日期：2017-03-13 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep23426
更新日期：2016-03-18 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2017-02-02 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-09-22 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-03-30 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2017-06-29 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2019-02-22 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-07-20 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep27778
更新日期：2016-06-10 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2017-01-05 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-03928-x
更新日期：2017-06-16 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-11-16 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-12-06 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2019-06-12 00:00:00
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pub_type： 杂志文章
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journal_title：Scientific reports
pub_type： 杂志文章
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2016-07-22 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2017-02-08 00:00:00
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journal_title：Scientific reports
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更新日期：2014-01-21 00:00:00
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更新日期：2018-06-11 00:00:00
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journal_title：Scientific reports
pub_type： 杂志文章
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更新日期：2015-12-21 00:00:00
