CrTe2 as a new saturable absorber for a passive mode-locking Er-doped laser,Journal of Materials Chemistry C

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CrTe2 as a new saturable absorber for a passive mode-locking Er-doped laser
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-09-18 , DOI: 10.1039/d3tc02085a
Junpeng Qiao ₁ , Safayet Ahmed _{2,

3} , Jialiang Yu ₄ , Ranran Fan ₁ , Guangqiang Liu ₁ , Yuen Hong Tsang _{2,

3} , Sujuan Feng ₁

Affiliation

1T-CrTe₂ is one of the 2D transition metal chalcogenides (TMCs) and has attracted great attention in the field of spintronics due to its fascinating magnetic properties. Except for its performance in spintronics, the optical properties such as the nonlinear optical (NLO) characteristics of 1T-CrTe₂ have rarely been reported. In this paper, the NLO properties of CrTe₂ nanoparticles of 1.5 μm were investigated by using a Z-scan method. The nonlinear absorption coefficient and nonlinear refractive index were measured to be −(1.9) × 10⁴ cm GW⁻¹ and 0.93 × 10⁻³ cm² GW⁻¹, respectively, which indicate the excellent NLO properties of CrTe₂ nanoparticles. Furthermore, by depositing 1T-CrTe₂ nanoparticles on a side-polished fiber and inserting CrTe₂-SA into an Er-doped fiber laser cavity, a stable mode-locking laser with a pulse width of 568 fs was achieved, demonstrating the good potential of 2D-CrTe₂ in ultrafast photonics applications.

中文翻译：

CrTe2 作为一种新型可饱和吸收体用于被动锁模掺铒激光器

1T-CrTe ₂是一种二维过渡金属硫属化物（TMC），由于其迷人的磁性能而在自旋电子学领域引起了极大的关注。_{除了在自旋电子学方面的性能外，1T-CrTe 2}的非线性光学（NLO）特性等光学特性鲜有报道。本文采用Z扫描方法研究了1.5 μm CrTe _{2纳米颗粒的非线性光学性质。}测得CrTe的非线性吸收系数和非线性折射率分别为-(1.9) × 10 ⁴ cm GW ^-1和0.93 × 10 ^-3 cm ² GW ^-1，这表明CrTe具有优异的非线性光学性能。_2个纳米粒子。此外，通过在侧面抛光的光纤上沉积1T-CrTe_{2纳米粒子并将CrTe}₂ -SA插入掺铒光纤激光腔中，获得了脉冲宽度为568 fs的稳定锁模激光器，展示了良好的潜力2D-CrTe₂在超快光子学应用中的应用。

更新日期：2023-09-18

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