Design of GaSb-based monolithic passive photonic devices at wavelengths above 2 µm
Design of GaSb-based monolithic passive photonic devices at wavelengths above 2 µm
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波长超过 2 µm 的 GaSb 基单片无源光子器件的设计
DOI:
10.1088/2515-7647/ace509
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Arafin, Shamsul
中科院分区:
文献类型:
--
作者:
Sumon, Md Saiful;Sankar, Shrivatch;You, Weicheng;Faruque, Imad I;Dwivedi, Sarvagya;Arafin, Shamsul
In this paper, we report, for the first time, a theoretical study on passive photonic devices including optical power splitters/combiners and grating couplers (GCs) operating at non-telecom wavelengths above 2 µm in a monolithic GaSb platform. Passive components were designed to operate, in particular, at around 2.6 µm for monolithic integration with active photonic devices on the III–V gallium antimonide material platform. The three popular types of splitters/combiners such as directional couplers, multimode interferometer-, and Y-branch-couplers were theoretically investigated. Based on our optimized design and rigorous analysis, fabrication-compatible 1× 2 optical power splitters with less than 0.12 dB excess losses, large spectral bandwidth, and a 50: 50 splitting ratio are achieved. For fiber-to-chip coupling, we also report the design of GCs with an outcoupling efficiency of∼ 29% at 2.56 μm and a 3 dB bandwidth of 80 nm. The results represent a significant step towards developing a complete functional photonic integrated circuits at mid-wave infrared wavelengths.
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DOI:
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期刊:
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期刊:
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