Woodpile Photonic Crytalsfabricated by
Two-Photon Polymerisation
Gaël NardinCours Photonic Crystals 2009
Woodpile Photonic Crystals
Woodpile Photonic Crystals
Outline
• Two-photon Polymerisation technique (2PP)
• Fabrication of woodpile photonic crystals
• Superprism effect
• Inversion
• Infiltration of Quantum Dots
Two-Photon Polymerisation (2PP)
Not diffraction limited
Practical resolution obtained :~100nm on x-y plane
300nm along z direction
J. Serbin et al, Optics Express 28, (2003)
Two-Photon Polymerisation (2PP)
Resins:- SU-8- Ormocer
J. Serbin et al, Optics Express 28, (2003)
n=~ 1.5
www.lzh.de
C. Reinhardt et al, Optics Lett. 31, (2006)
J. Serbin et al., Optics Express 21 (2004)
disorder and imperfections within the fabricated crystal→ Rayleigh scattering scaling as λ −4
Optical characterization
J. Serbin et al., Optics Express 21 (2004)
J. Li et al., Optics Express 24 (2008)
Superprism effect
J. Serbin et al., J. Appl. Phys 98 (2005)J. Serbin et al., Adv. Mat. 18 (2006)
Superprism effect
J. Serbin et al., Optics Express 14 (2006)
Inversion
Infiltration with TiO2
J. Serbin et al., Optics Express 21 (2004)
Inversion
J. Serbin et al., Optics Express 21 (2004)
Infiltration with TiO2 Infiltration with TiO2 mixed with SiO2
SU-8 TiO2
TiO2 & SiO2
B. Jia et al., J. Appl. Phys 102 (2007)
Inversion
J. Serbin et al., Optics Express 21 (2004)
Infiltration with TiO2 Infiltration with TiO2 mixed with SiO2
SU-8 TiO2
TiO2 & SiO2
B. Jia et al., J. Appl. Phys 102 (2007)
“almost completely reproducible”
Inversion
Infiltration with TiO2 mixed with SiO2
SU-8 TiO2
TiO2 & SiO2
B. Jia et al., J. Appl. Phys 102 (2007)
n = 2.2
Measurement: Average on 18° to 41° with respect to the surface normal of the PC
Infiltration of Quantum Dots
J. Li et al., Adv. Mat. 19 (2007)
PbSe QDs
Infiltration of Quantum Dots
J. Li et al., Adv. Mat. 19 (2007)
Transmission of PC
Bare QD emission
Infiltration of Quantum Dots
J. Li et al., Adv. Mat. 19 (2007)
QDs alone QDs in PC
“This work provides an important step towards controlling QD emission in the NIR wavelength range with 3D PCs, which could facilitate the exploration of advanced functionalities of the 3D PCs for active devices in telecommunications.”
Conclusions
• Technique puissante et rapide pour la réalisation de structures arbitraires 3D diélectriques
• Jolies images SEM
• Performances optiques limitées par le désordre
• Integration avec d’autres technologies difficile