[8p-A410-1~10] 4.8 Strong Light Excitation Phenomena Applied to Materials and Bio Engneering

▲ [8p-A410-2] Nanoscale modification of glass via micro-explosion using ultrafast Bessel laser pulse

〇(P)Manoj Kumar Bhuyan¹、Razvan Stoian²、Koji Sugioka¹ (1.RIKEN Center for Advanced Photonics, Wako, Japan、2.Universite Jean Monnet, Saint Etienne, France)

キーワード：Bessel beam, Nanofabrication, Ultrafast dynamics

In the framework of laser-induced micro- and nanoscale material modification, we present results on ultrafast Bessel beam-glass interaction, inducing extended length scale material modification on single-shot basis. Using ultrashort zero-order Bessel laser pulse in tight focusing geometries, we studied the excitation and relaxation behaviour of fused silica glass over a temporal domain ranging from nanoseconds to microseconds. We revealed the structural evolution dynamics, and in particular the signs of emergence of a void-like phase via micro-explosion on a rather slow time scale i.e. few hundred nanoseconds after laser excitation. Nevertheless, the Bessel beam-glass interaction was exploited for ultimate nanoscale material transformation.