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3D nanoripples, self-assembled form birefringence and ultrafast laser calligraphy in transparent materials

3D nanoripples, self-assembled form birefringence and ultrafast laser calligraphy in transparent materials
3D nanoripples, self-assembled form birefringence and ultrafast laser calligraphy in transparent materials
Modification of transparent materials with ultrafast lasers has attracted considerable interest due to a wide range of applications including laser surgery, integrated optics, optical data storage, 3D micro- and nanostructuring [1]. Three different types of material modifications can be induced with ultrafast laser irradiation in the bulk of a transparent material, silica glass in particular: an isotropic refractive index change (type 1); a form birefringence associated with self-assembled nanogratings (3D nanoripples) and negative refractive index change (type 2) [2,3]; and a void (type 3). In fused silica the transition from type 1 to type 2 and finally to type 3 modification is observed with an increase of fluence. Recently, a remarkable phenomenon in ultrafast laser processing of transparent materials has been reported manifesting itself as a change in material modification by reversing the writing direction [4]. The phenomenon has been interpreted in terms of anisotropic plasma heating by a tilted front of the ultrashort laser pulse. Moreover a change in structural modification has been demonstrated in glass by controlling the direction of pulse front tilt, achieving a calligraphic style of laser writing which is similar in appearance to that inked with the bygone quill pen [5]. It has also been a common belief that in a homogeneous medium the photosensitivity and corresponding light-induced material modifications do not change on the reversal of light propagation direction. Moreover a new phenomenon of ultrafast light blade, representing itself the first evidence of anisotropic sensitivity of isotropic medium to femtosecond laser radiation has been recently discovered [6]. We anticipate that the observed phenomena will open new opportunities in laser material processing, laser surgery, optical manipulation and data storage.
Kazansky, Peter G.
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Yang, Weijia
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Beresna, Martynas
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Shimotsuma, Yasuhiko
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Sakakura, Masaaki
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Miura, Kiyotaka
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Hirao, Kazuyuki
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Qiu, Jiarong
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Svirko, Yuri P.
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Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Yang, Weijia
ecad1a03-22e3-4a91-b6e6-a5f8660e2ab4
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Shimotsuma, Yasuhiko
0664279b-def2-41d4-a5ec-207ce02013a7
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Miura, Kiyotaka
5dbc9159-ace0-4dd9-b18d-36f87ae78c47
Hirao, Kazuyuki
5cc5061d-6217-49ae-bc92-ff5b72b9c6c2
Qiu, Jiarong
befa87a1-4795-4e67-b74f-81239eee689c
Svirko, Yuri P.
d64a0366-ef29-4a31-878e-54f7536816ac

Kazansky, Peter G., Yang, Weijia, Beresna, Martynas, Shimotsuma, Yasuhiko, Sakakura, Masaaki, Miura, Kiyotaka, Hirao, Kazuyuki, Qiu, Jiarong and Svirko, Yuri P. (2009) 3D nanoripples, self-assembled form birefringence and ultrafast laser calligraphy in transparent materials. Workshop on ZnO and TiO2 Nanostructures, Germany. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Modification of transparent materials with ultrafast lasers has attracted considerable interest due to a wide range of applications including laser surgery, integrated optics, optical data storage, 3D micro- and nanostructuring [1]. Three different types of material modifications can be induced with ultrafast laser irradiation in the bulk of a transparent material, silica glass in particular: an isotropic refractive index change (type 1); a form birefringence associated with self-assembled nanogratings (3D nanoripples) and negative refractive index change (type 2) [2,3]; and a void (type 3). In fused silica the transition from type 1 to type 2 and finally to type 3 modification is observed with an increase of fluence. Recently, a remarkable phenomenon in ultrafast laser processing of transparent materials has been reported manifesting itself as a change in material modification by reversing the writing direction [4]. The phenomenon has been interpreted in terms of anisotropic plasma heating by a tilted front of the ultrashort laser pulse. Moreover a change in structural modification has been demonstrated in glass by controlling the direction of pulse front tilt, achieving a calligraphic style of laser writing which is similar in appearance to that inked with the bygone quill pen [5]. It has also been a common belief that in a homogeneous medium the photosensitivity and corresponding light-induced material modifications do not change on the reversal of light propagation direction. Moreover a new phenomenon of ultrafast light blade, representing itself the first evidence of anisotropic sensitivity of isotropic medium to femtosecond laser radiation has been recently discovered [6]. We anticipate that the observed phenomena will open new opportunities in laser material processing, laser surgery, optical manipulation and data storage.

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Published date: 9 July 2009
Additional Information: (Invited)
Venue - Dates: Workshop on ZnO and TiO2 Nanostructures, Germany, 2009-07-09

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Local EPrints ID: 169007
URI: http://eprints.soton.ac.uk/id/eprint/169007
PURE UUID: b605b4c0-8417-4e11-b9d1-2d95bb45fba8

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Date deposited: 08 Dec 2010 14:11
Last modified: 19 Mar 2020 17:35

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Contributors

Author: Weijia Yang
Author: Yasuhiko Shimotsuma
Author: Masaaki Sakakura
Author: Kiyotaka Miura
Author: Kazuyuki Hirao
Author: Jiarong Qiu
Author: Yuri P. Svirko

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