Cryogenic thermo-optic thin-film lithium niobate modulator with an NbN superconducting heater

被引：3

作者：

Han, Hailong ^{[1
,2
]}

Zhang, Xingyu ^{[1
,2
]}

Xiao, You ^{[1
,2
]}

Yuan, Pusheng ^{[2
]}

Yu, Huiqin ^{[1
,2
]}

Wang, Shuna ^{[1
,2
]}

Li, Heng ^{[3
]}

Xie, Weikeng ^{[3
]}

Lu, Mingzhi ^{[3
]}

Li, Lingyun ^{[1
,2
]}

Liu, Xiaoping ^{[4
]}

Li, Hao ^{[1
,2
]}

You, Lixing ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol SIMI, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[2] CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China

[3] Ori Chip Optoelect Technol Ltd, Ningbo 315000, Peoples R China

[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2023年 / 21卷 / 08期

关键词：

cryogenic modulator; lithium niobate; superconductance; LINBO3; SWITCH;

D O I：

10.3788/COL202321.081301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and demonstrate a cryogenic thermo-optic (TO) modulator in x- cut thin-film lithium niobate (TFLN) with an NbN superconducting heater. Compared to a conventional metal heating electrode, a fast and energy-efficient modulation is obtained by placing an NbN superconducting heating electrode above the TFLN waveguide. The transition of the NbN superconducting electrode between superconducting and normal states turns the heating and cooling processes from continuous to discontinuous change. Thus, the energy consumption during the modulation process is reduced proportionally. The rise/fall time of the proposed device is 22 mu s/15 mu s, which has been the fastest response time reported in TFLN thermo-optic modulators so far. The presented TO modulator can easily be used at cryogenic temperatures and has great potential for applications in cryogenic optoelectronics.

引用

页数：4

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