掺银玻璃中Laser诱导的径向双折射和自旋-轨道光学angular momentum转换
Laser-induced radial birefringence and spin-to-orbital optical angular momentum conversion in silver-doped glasses
摘要：
经过强激光照射的Ag $^+$ /Na $^{+}$离子交换玻璃样品可能会由于形成银纳米颗粒图案和其他结构而产生新的光学性质。在这里，我们报告的观察激光诱导的永久横向双折射，与光轴形成一个径向图案，所揭示的自旋到轨道的角动量转换发生在探测光束。双折射图案可以很好地建模，导致在激光曝光过程中的银掺杂玻璃中产生的热致应力，虽然导致永久各向异性的实际机制可能更复杂。
英文摘要：
Samples of Ag$^+$/Na$^{+}$ ion-exchanged glass that have been subject to intense laser irradiation may develop novel optical properties, as a consequence of the formation of patterns of silver nanoparticles and other structures. Here, we report the observation of a laser-induced permanent transverse birefringence, with the optical axis forming a radial pattern, as revealed by the spin-to-orbital angular momentum conversion occurring in a probe light beam. The birefringence pattern can be modeled well as resulting from thermally-induced stresses arising in the silver-doped glass during laser exposure, although the actual mechanism leading to the permanent anisotropy is probably more complex.
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