Publications (10)
Broadband black phosphorus optical modulator in visible to mid-infrared spectral range
Rui Zhang, Yuxia Zhang, Haohai Yu +5
Black phosphorous (BP), a two-dimensional (2D) material, has a direct bandgap, which fills up the bandgap lacuna left by graphene topological insulators and transition-metal dichal…
Refractor Importance Sampling
Haohai Yu, Robert A. van Engelen
In this paper we introduce Refractor Importance Sampling (RIS), an improvement to reduce error variance in Bayesian network importance sampling propagation under evidential reasoni…
Symmetrical broken and nonlinear response of Weyl semimetal TaAs influenced by the topological surface states and Weyl nodes
Shumeng Chi, Zhilin Li, Haohai Yu +4
A Weyl semimetal (WSM) features Weyl fermions in its bulk and topological surface states on surfaces, and is novel material hosting Weyl fermions, a kind of fundamental particles.…
Extreme-ultraviolet laser generation at 118 nm via adaptive random additional periodic-phase engineering in a LiF crystal
Yanling Cheng, Bin Zhang, Fei Liang +2
Extreme ultraviolet (EUV) coherent sources below 120nm are of paramount significance for promoting next-generation nano-scale lithography,precision spectroscopy, and exploring the…
Liquid Epitaxial Growth of Two-dimensional Non-layer structured hybrid Perovskite
Yu Bai, Haixin Zhang, Mingjing Zhang +13
The hybrid perovskite CH3NH3PbX3 (X= Cl, Br, I) is a promising material for developing novel optoelectronic devices. Owing to the intrinsic non-layer structure, it remains challeng…
The green light generation by self-frequency-doubled Yb:YCOB crystal
Qiannan Fang, Haohai Yu, Huaijin Zhang +1
Taking advantages of the broad emission bands of a Yb3+ doped calcium yttrium oxoborate (Yb:YCOB) crystal cut along the optimized direction out of principle planes with the maximum…
Measuring the Hardness of Stochastic Sampling on Bayesian Networks with Deterministic Causalities: the k-Test
Haohai Yu, Robert A. van Engelen
Approximate Bayesian inference is NP-hard. Dagum and Luby defined the Local Variance Bound (LVB) to measure the approximation hardness of Bayesian inference on Bayesian networks, a…
Deep-ultraviolet second harmonic generation in a conventional crystal quartz by freeing phase-matching in nonlinear optics
Mingchuan Shao, Fei Liang, Haohai Yu +1
Nonlinear frequency conversion in optics can originate the coherent light at the wavelength where it is hard or unlikely to achieve by directly lasing and is a fundamental topic in…
Ultra-broadband photodetection of Weyl semimetal TaAs up to infrared 10 μm range at room temperature
Shumeng Chi, Zhilin Li, Ying Xie +8
Photodetectors with broadband optical response have promising applications in many advanced optoelectronic and photonic devices. Especially, those with the detection range up to mi…
Thermally driven continuous-wave and pulsed optical vortex
Yitian Ding, Miaomiao Xu, Yongguang Zhao +4
We demonstrated the continuous-wave (cw) and pulsed optical vortex with topological charges driven by heat generated during the lasing process without introducing the astigmatism e…