{"product_id":"niobium-oxydichloride-nbocl","title":"Niobium Oxydichloride (NbOCl₂)","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eNbOCl₂ is an emerging \u003c\/span\u003e\u003cstrong\u003enonlinear-optical van der Waals crystal\u003c\/strong\u003e\u003cspan\u003e that has recently attracted intense interest for its giant \u003c\/span\u003e\u003cstrong\u003eSecond Harmonic Generation (SHG)\u003c\/strong\u003e\u003cspan\u003e efficiency. It adopts a \u003c\/span\u003e\u003cstrong\u003emonoclinic structure\u003c\/strong\u003e\u003cspan\u003e with space group C2, built from one-dimensional NbO chains; within the NbO₆ octahedra, the Nb atoms undergo an \u003c\/span\u003e\u003cstrong\u003eoff-centering (Peierls-type) distortion\u003c\/strong\u003e\u003cspan\u003e, resulting in \u003c\/span\u003e\u003cstrong\u003ebroken inversion symmetry\u003c\/strong\u003e\u003cspan\u003e—the origin of its strong SHG and ferroelectric-like behavior. Its bandgap is around \u003c\/span\u003e\u003cstrong\u003e1.9 eV\u003c\/strong\u003e\u003cspan\u003e. Its most striking feature is the near-complete \u003c\/span\u003e\u003cstrong\u003einterlayer electronic decoupling\u003c\/strong\u003e\u003cspan\u003e: the nonlinear optical response is almost independent of layer number, and the material serves as a candidate for \u003c\/span\u003e\u003cstrong\u003eon-chip quantum light sources\u003c\/strong\u003e\u003cspan\u003e (entangled photon pairs \/ spontaneous parametric down-conversion), giving it significant promise for \u003c\/span\u003e\u003cstrong\u003eintegrated photonics and quantum optics\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"2D Material Supermarket","offers":[{"title":"Default Title","offer_id":53862478577848,"sku":null,"price":4967.0,"currency_code":"CNY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0649\/0069\/4200\/files\/39a9fce21a9dd2110d6690b3a3126fd9.png?v=1786008526","url":"https:\/\/2dmaterialsupermarket.com\/products\/niobium-oxydichloride-nbocl","provider":"2D Material Supermarket","version":"1.0","type":"link"}