Highly efficient frequency conversion in GaSe nanoribbons is demonstrated in article number 1701012 by Fuxing Gu and co‐workers. Benefitting from the strong confinement of sub‐wavelength optical guiding and high second‐order nonlinearity of the GaSe material, significantly enhanced nonlinear light–matter interaction is observed in GaSe nanoribbons. Based on transverse second‐harmonic generation, a single GaSe nanoribbon‐configured optical auto‐correlator for ultrashort pulse characterization is demonstrated, with high sensitivity down to few femto‐joule.

中文翻译：

---

非线性光学转换：波导GaSe纳米带中的高效非线性光学转换，泵浦脉冲下降到毫微焦耳级（先进光学材料5/2018）

Fuxing Gu及其同事在编号为1701012的产品中展示了GaSe纳米带中的高效频率转换。受益于亚波长光导的严格限制和GaSe材料的高二阶非线性，GaSe纳米带中观察到了显着增强的非线性光-质相互作用。基于横向二次谐波产生，展示了用于超短脉冲表征的单个GaSe纳米带结构光学自相关器，灵敏度高至几毫微焦耳。