TY - JOUR
T1 - Effect of silver thickness on the formation of surface plasmon polaritons in silver-coated silicon nitride photonic crystal slabs
AU - Shyu, Jia Hong
AU - Ou, Neil
AU - Chien, Jui Hsing
AU - Lee, Huang Ming
AU - Tai, Chao Yi
AU - Wu, Jong-Ching
PY - 2010/6/1
Y1 - 2010/6/1
N2 - A systematic study of the influence of silver film thickness on the transmittance spectra through a silicon nitride photonic crystal slab (SiN-PCS) coated with silver films of various thicknesses is presented. The transmission spectrum through a bare SiN-PCS reveals guided resonances. When an ultrathin silver film (<10nm in thickness) is coated on a SiN-PCS, isolated silver nanoparticles are formed resulting in the suppression of guided resonances. In addition, a red shift is found in the optical transmittance spectra measured on SiN-PCS coated with a progressively thicker silver film. This may be attributed to the formation of localized surface plasmon resonances at the interface between silver nanoparticles and silicon nitride. A continuous texture is formed as the thickness of the silver film is increased up to 20 nm, resulting in a transition from localized surface plasmon resonances to surface plasmon polaritons. Furthermore, the surface plasmon polaritons that are formed externally (internally) are identified in SiN-PCS coated on one side (double sides) with a 20-nm-thick silver film.
AB - A systematic study of the influence of silver film thickness on the transmittance spectra through a silicon nitride photonic crystal slab (SiN-PCS) coated with silver films of various thicknesses is presented. The transmission spectrum through a bare SiN-PCS reveals guided resonances. When an ultrathin silver film (<10nm in thickness) is coated on a SiN-PCS, isolated silver nanoparticles are formed resulting in the suppression of guided resonances. In addition, a red shift is found in the optical transmittance spectra measured on SiN-PCS coated with a progressively thicker silver film. This may be attributed to the formation of localized surface plasmon resonances at the interface between silver nanoparticles and silicon nitride. A continuous texture is formed as the thickness of the silver film is increased up to 20 nm, resulting in a transition from localized surface plasmon resonances to surface plasmon polaritons. Furthermore, the surface plasmon polaritons that are formed externally (internally) are identified in SiN-PCS coated on one side (double sides) with a 20-nm-thick silver film.
UR - http://www.scopus.com/inward/record.url?scp=77955313765&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955313765&partnerID=8YFLogxK
U2 - 10.1143/JJAP.49.06GG07
DO - 10.1143/JJAP.49.06GG07
M3 - Article
AN - SCOPUS:77955313765
VL - 49
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
SN - 0021-4922
IS - 6 PART 2
ER -