Ultra-broadband reflector using double-layer subwavelength gratings

Jinlong Zhang; Shuaikai Shi; Hongfei Jiao; Xiaochuan Ji; Zhanshan Wang; Xinbin Cheng

doi:10.1364/PRJ.382941

Journals >Photonics Research >Volume 8 >Issue 3 >Page 426 > Article

Photonics Research
Vol. 8, Issue 3, 426 (2020)

Ultra-broadband reflector using double-layer subwavelength gratings

Jinlong Zhang^1、2、3, Shuaikai Shi^1、2, Hongfei Jiao^1、2, Xiaochuan Ji^1、2, Zhanshan Wang^1、2、3, and Xinbin Cheng^{1、2、3、*}

Author Affiliations

¹MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China

²Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

³IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

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DOI: 10.1364/PRJ.382941 Cite this Article Set citation alerts

Jinlong Zhang, Shuaikai Shi, Hongfei Jiao, Xiaochuan Ji, Zhanshan Wang, Xinbin Cheng. Ultra-broadband reflector using double-layer subwavelength gratings[J]. Photonics Research, 2020, 8(3): 426 Copy Citation Text

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Fig. 1. (a) Cross-sectional view of the double-layer subwavelength grating mirror, (b) interference of light between the two subwavelength gratings.

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(a) Computed zeroth-order reflectance of the two gratings for TM-polarized light at normal incidence (R12,R23, and Rtotal), (b) round-trip phase of the cavity [δ(λ)].

Fig. 2. (a) Computed zeroth-order reflectance of the two gratings for TM-polarized light at normal incidence (R12,R23, and Rtotal), (b) round-trip phase of the cavity [δ(λ)].

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Fig. 3. Calculated and measured spectra of the double-layer SWG for TM-polarized light.

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Fig. 4. SEM top and cross-sectional views of the double-layer SWG on a quartz substrate.

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Fig. 5. Fitted and measured spectra of the double-layer SWG for TM-polarized light.

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Jinlong Zhang, Shuaikai Shi, Hongfei Jiao, Xiaochuan Ji, Zhanshan Wang, Xinbin Cheng. Ultra-broadband reflector using double-layer subwavelength gratings[J]. Photonics Research, 2020, 8(3): 426

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