The low-dimensional light source shows promise in photonic integrated circuits. Stable layered van der Waals material that exhibits luminescence in the near-infrared optical communication waveband is an essential component in on-chip light sources. Herein, the tunable near-infrared photoluminescence (PL) of the air-stable layered titanium trisulfide (TiS₃) is reported. Compared with iodine particles as a transport agent, TiS₃ grown by chemical vapor transport using sulfur powder as a transport agent has fewer sulfur vacancies, which increases the luminescence intensity by an order of magnitude. The PL emission wavelength can be regulated in the near-infrared regime by thickness control. In addition, we observed an interesting anisotropic strain response of PL in layered TiS₃ nanoribbon: a blue shift of PL was achieved when the uniaxial tensile strain was applied along the b-axis, while a negligible shift was observed when the strain was applied along the a-axis. Our work reveals the tunable near-infrared luminescent properties of TiS₃ nanoribbons, suggesting their potential applications as near-infrared light sources in photonic integrated circuits.

低维光源在光子集成电路中显示出前景。在近红外光通信波段中表现出发光的稳定层状范德华材料是片上光源的重要组成部分。在此，报道了空气稳定的层状三硫化钛（TiS ₃ ）的可调谐近红外光致发光（PL）。与碘颗粒作为传输剂相比，以硫粉作为传输剂通过化学气相传输生长的TiS ₃具有更少的硫空位，这使得发光强度提高了一个数量级。 PL 发射波长可以通过厚度控制在近红外范围内调节。此外，我们在层状 TiS _{3纳米带中观察到 PL 的有趣的各向异性应变响应：当沿}b轴施加单轴拉伸应变时，实现了 PL 的蓝移，而当沿 b 轴施加应变时，观察到可忽略不计的偏移。 a轴。我们的工作揭示了TiS ₃纳米带的可调谐近红外发光特性，表明它们作为光子集成电路中近红外光源的潜在应用。