Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

Beilstein Journal of Nanotechnology

Tanujjal Bora¹  Joydeep Dutta²  Josep Maria Serres³  Francesc Díaz³  Magdalena Aguiló³  Xavier Mateos³  Pavel Loiko⁴  Valentin Petrov⁵  Uwe Griebner⁵  Haohai Yu⁶ 

[1]Chair in Nanotechnology, Water Research Center, Sultan Qaboos University, P.O. Box 17, Al-Khoudh, 123 Muscat, Oman

[2]Functional Materials, Applied Physics Department, School of Engineering Sciences, KTH Royal Institute of Technology, Isafjordsgatan 22, SE-164 40 Kista Stockholm, Sweden

[3]Física i Cristallografia de Materials i Nanomaterials (FiCMA-FiCNA)-EMaS, Dept. Química Física i Inòrganica, Universitat Rovira i Virgili (URV), Campus Sescelades, 43007 Tarragona, Spain

[4]ITMO University, Kronverkskiy pr., 49, 197101 Saint-Petersburg, Russia

[5]Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, 12489 Berlin, Germany

[6]State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China

关键词: oriented nanorods;    Q-switching;    saturable absorption;    solid-state lasers;    zinc oxide;   

DOI  :  10.3762/bjnano.9.255

来源: DOAJ

【 摘 要 】

Zinc oxide (ZnO) nanorods (NRs) oriented along the crystallographic [001] axis are grown by the hydrothermal method on glass substrates. The ZnO NRs exhibit a broadband (1–2 µm) near-IR absorption ascribed to the singly charged zinc vacancy VZn−1. The saturable absorption of the ZnO NRs is studied at ≈1 µm under picosecond excitation, revealing a low saturation intensity, ≈10 kW/cm2, and high fraction of the saturable losses. The ZnO NRs are applied as saturable absorbers in diode-pumped Yb (≈1.03 µm) and Tm (≈1.94 µm) lasers generating nanosecond pulses. The ZnO NRs grown on various optical surfaces are promising broadband saturable absorbers for nanosecond near-IR lasers in bulk and waveguide geometries.

【 授权许可】

Unknown