Graphitic carbon nitride, a saturable absorber material for the visible waveband

Mengxia Wang; Fukun Ma; Zhengping Wang; Dawei Hu; Xinguang Xu; Xiaopeng Hao

doi:10.1364/PRJ.6.000307

Journals >Photonics Research >Volume 6 >Issue 4 >Page 307 > Article

Photonics Research
Vol. 6, Issue 4, 307 (2018)

Graphitic carbon nitride, a saturable absorber material for the visible waveband

Mengxia Wang^1、†, Fukun Ma^1、†, Zhengping Wang^1、*, Dawei Hu², Xinguang Xu¹, and Xiaopeng Hao^1、3

Author Affiliations

¹State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

²Research Institute of Science and Technology, Shandong University, Jinan 250100, China

³e-mail: xphao@sdu.edu.cn

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DOI: 10.1364/PRJ.6.000307 Cite this Article Set citation alerts

Mengxia Wang, Fukun Ma, Zhengping Wang, Dawei Hu, Xinguang Xu, Xiaopeng Hao. Graphitic carbon nitride, a saturable absorber material for the visible waveband[J]. Photonics Research, 2018, 6(4): 307 Copy Citation Text

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Abstract

For the first time to our knowledge, graphitic carbon nitride (

g - C_{3} N_{4}

) nanosheets are found to be an excellent saturable absorber material in the visible waveband.

g - C_{3} N_{4}

exhibits much stronger saturable absorption in this region than in the near-infrared region, unlike other two-dimensional materials such as graphene and black phosphorus. By the Z-scan method, the nonlinear absorption coefficient

β

of the material is first measured at three visible wavelengths, and for

g - C_{3} N_{4}

it is

2.05

0.34

, and

0.11 cm \cdot {GW}^{1}

at 355, 532, and 650 nm, respectively. These are much larger than

0.06 cm \cdot {GW}^{1}

at 1064 nm.

Keywords

Nanomaterials Nonlinear optical materials Nonlinear optics, materials

T_{OA} (z) = \sum_{m = 0}^{\infty} \frac{{[- q_{0} (z, 0)]}^{m}}{{(m + 1)}^{1.5}}, m \in N,

(1)

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q_{0} (z, 0) = \frac{β I_{0} L_{eff}}{1 + z^{2} / z_{R}^{2}},

(2)

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T_{C / O} (x) = 1 + \frac{4 x Δ ϕ}{(1 + x^{2}) (9 + x^{2})} + \frac{4 (3 x^{2} - 5) Δ ϕ^{2}}{(1 + x^{2}) (9 + x^{2}) (25 + x^{2})} + \frac{32 (3 x^{2} - 11) x Δ ϕ^{3}}{(1 + x^{2}) (9 + x^{2}) (25 + x^{2}) (49 + x^{2})},

(3)

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Re χ^{(3)} (esu) = \frac{c n_{0}^{2}}{120 π^{2}} n_{2} (m^{2} / W),

(4)

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Im χ^{(3)} (esu) = \frac{c^{2} n_{0}^{2}}{240 π^{2} ω} β_{2} (m / W),

(5)

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Mengxia Wang, Fukun Ma, Zhengping Wang, Dawei Hu, Xinguang Xu, Xiaopeng Hao. Graphitic carbon nitride, a saturable absorber material for the visible waveband[J]. Photonics Research, 2018, 6(4): 307

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