2021年3月3日 · Here, we report highly tunable second harmonic generation (SHG) from nanomechanically rotatable stacks of bulk hexagonal boron nitride (BN) crystals and introduce the term twistoptics to describe studies of optical properties in twistable vdW systems.

2019年7月12日 · Recent research has revealed that hBN exhibits a unique combination of optical properties that enable novel (nano)photonic functionalities. Specifically, hBN is a natural hyperbolic material in...

2013年5月29日 · We have measured optical second-harmonic generation (SHG) from atomically thin samples of MoS 2 and h-BN with one to five layers. We observe strong SHG from materials with odd layer thickness, for which a noncentrosymmetric structure is expected, while the centrosymmetric materials with even layer thickness do not yield appreciable SHG.

2021年11月25日 · Second-harmonic generation (SHG) is a non-linear optical process, where two photons coherently combine into one photon of twice their energy. Efficient SHG occurs for...

1 天前 · The non-vanishing SHG signal detected in the 2.5-nm-thick (AA′)hBN, although lower than in the MOCVD-grown (AA)hBN film, may come from an odd number of layers in the exfoliated flake and from ...

We report second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109-111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments. This confirms that …

2019年12月1日 · In this Letter, we report the second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109-111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments.

The optical second harmonic generation (SHG) efficiency of hexagonal boron nitride (h-BN) layered materials is profoundly influenced by the symmetry properties, which has severely limited the usefulness of their SHG for nonlinear optical applications.

In this tutorial, we compute the Second-harmonic generation (SHG) from the dynamics of the Bloch-states. The equation-of-motion of the Bloch-states is explained in the tutorial on Linear response from Bloch-states dynamics. Independently of the 'experiment' we simulate, the part of the integration of motion stays the same.

In this Letter, we report the second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109–111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments.