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Near-field imaging of femtosecond laser ablated sub-lambda/4 holes in lithium niobate

Appl. Phys. Lett. 95, 181103 (2009); doi:10.1063/1.3256219

Published 2 November 2009

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Airán Ródenas,1 Jorge Lamela,1 Daniel Jaque,1 Ginés Lifante,1 Francisco Jaque,1 Antonio García-Martín,2 Guangyong Zhou,3 and Min Gu3
1Dept. de Física de Materiales, Universidad Autónoma de Madrid, Cantoblanco, 28047 Madrid, Spain
2Instituto de Microelectrónica de Madrid, IMM (CNM-CSIC), 28760 Tres Cantos, Spain
3Centre for Micro-Photonics and Centre for Ultrahigh-Bandwidth Devices for Optical Systems, Faculty of Engineering and Industrial Sciences, P.O. Box 218, Hawthorn, Victoria 3122, Australia
We report on the direct femtosecond laser ablation of sub-lambda/4 (80–250 nm) holes in LiNbO3 crystals and on its local near-field imaging. We show that the near-field transmission of holes can feature an attenuation of ~75% at hole central position, and a ~20% transmission enhancement at its sides. This high-contrast ring-shaped near-field distribution is found to be in agreement with simulations, suggesting the surface relief as the main contrast mechanism. ©2009 American Institute of Physics
History: Received 19 August 2009; accepted 8 October 2009; published 2 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/181103/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.38.Mf
    Laser ablation
  • 42.65.Re
    Ultrafast processes; optical pulse generation and pulse compression
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (14)
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