Compact high-contrast silicon optical filter using all-passive and CROW Fano nanobeam resonators

Ziwei Cheng; Jiahui Zhang; Jianji Dong; Yunhong Ding

doi:10.1364/OL.433850

Compact high-contrast silicon optical filter using all-passive and CROW Fano nanobeam resonators

Ziwei Cheng, Jiahui Zhang, Jianji Dong, Yunhong Ding

Centre of Excellence for Silicon Photonics for Optical Communications

Huazhong University of Science and Technology

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We propose and experimentally demonstrate a high-order coupled-resonator optical waveguide (CROW) nanobeam filter with semi-symmetrical Fano resonance enhancement. Thanks to the tight arrangement of multiple nanobeams and assistance of the partial transmission element, the designed filter has a high-contrast transmission and low insertion loss. Finally, the fabricated filter has a compact size of 20 µm × 10 µm, a high extinction ratio as much as 70 dB, and an insertion loss as low as 1 dB. This filter shows a passive structure without thermal control configuration for calibration on each resonator. This compact filter can be a basic building block for various applications requiring high extinction ratio filtering, such as single-photon source filtering of integrated photon chips.

Original language	English
Journal	Optics Letters
Volume	46
Issue number	16
Pages (from-to)	3873-3876
ISSN	0146-9592
DOIs	https://doi.org/10.1364/OL.433850
Publication status	Published - 15 Aug 2021

Bibliographical note

Funding Information:
Funding. National Natural Science Foundation of China (61805090, 62075075); The Center of Excellence, Denmark SPOC (DNRF123); VILLUM FONDEN, QUANPIC (00025298).

Publisher Copyright:
© 2021 Optical Society of America

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title = "Compact high-contrast silicon optical filter using all-passive and CROW Fano nanobeam resonators",

abstract = "We propose and experimentally demonstrate a high-order coupled-resonator optical waveguide (CROW) nanobeam filter with semi-symmetrical Fano resonance enhancement. Thanks to the tight arrangement of multiple nanobeams and assistance of the partial transmission element, the designed filter has a high-contrast transmission and low insertion loss. Finally, the fabricated filter has a compact size of 20 µm × 10 µm, a high extinction ratio as much as 70 dB, and an insertion loss as low as 1 dB. This filter shows a passive structure without thermal control configuration for calibration on each resonator. This compact filter can be a basic building block for various applications requiring high extinction ratio filtering, such as single-photon source filtering of integrated photon chips.",

author = "Ziwei Cheng and Jiahui Zhang and Jianji Dong and Yunhong Ding",

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AU - Cheng, Ziwei

AU - Zhang, Jiahui

AU - Dong, Jianji

AU - Ding, Yunhong

N1 - Funding Information: Funding. National Natural Science Foundation of China (61805090, 62075075); The Center of Excellence, Denmark SPOC (DNRF123); VILLUM FONDEN, QUANPIC (00025298). Publisher Copyright: © 2021 Optical Society of America

PY - 2021/8/15

Y1 - 2021/8/15

N2 - We propose and experimentally demonstrate a high-order coupled-resonator optical waveguide (CROW) nanobeam filter with semi-symmetrical Fano resonance enhancement. Thanks to the tight arrangement of multiple nanobeams and assistance of the partial transmission element, the designed filter has a high-contrast transmission and low insertion loss. Finally, the fabricated filter has a compact size of 20 µm × 10 µm, a high extinction ratio as much as 70 dB, and an insertion loss as low as 1 dB. This filter shows a passive structure without thermal control configuration for calibration on each resonator. This compact filter can be a basic building block for various applications requiring high extinction ratio filtering, such as single-photon source filtering of integrated photon chips.

AB - We propose and experimentally demonstrate a high-order coupled-resonator optical waveguide (CROW) nanobeam filter with semi-symmetrical Fano resonance enhancement. Thanks to the tight arrangement of multiple nanobeams and assistance of the partial transmission element, the designed filter has a high-contrast transmission and low insertion loss. Finally, the fabricated filter has a compact size of 20 µm × 10 µm, a high extinction ratio as much as 70 dB, and an insertion loss as low as 1 dB. This filter shows a passive structure without thermal control configuration for calibration on each resonator. This compact filter can be a basic building block for various applications requiring high extinction ratio filtering, such as single-photon source filtering of integrated photon chips.

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Compact high-contrast silicon optical filter using all-passive and CROW Fano nanobeam resonators

Abstract

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