標題: Probing the intrinsic optical Bloch-mode emission from a 3D photonic crystal
作者: Hsieh, Mei-Li
Bur, James A.
Du, Qingguo
John, Sajeev
Lin, Shawn-Yu
光電工程學系
Department of Photonics
關鍵字: photonic crystals;photonic bandgap materials;thermal radiation;nanomaterials
公開日期: 14-Oct-2016
摘要: We report experimental observation of intrinsic Bloch-mode emission from a 3D tungsten photonic crystal at low thermal excitation. After the successful removal of conventional metallic emission (normal emission), it is possible to make an accurate comparison of the Bloch-mode and the normal emission. For all biases, we found that the emission intensity of the Bloch-mode is higher than that of the normal emission. The Bloch-mode emission also exhibits a slower dependence on (h(omega)/k(b)T) than that of the normal emission. The observed higher emission intensity and a different T-dependence is attributed to Bloch-mode assisted emission where emitters have been located into a medium having local density of states different than the isotropic case. Furthermore, our finite-difference time-domain (FDTD) simulation shows the presence of localized spots at metal-air boundaries and corners, having intense electric field. The enhanced plasmonic field and local non-equilibrium could induce a strong thermally stimulated emission and may be the cause of our unusual observation.
URI: http://dx.doi.org/10.1088/0957-4484/27/41/415204
http://hdl.handle.net/11536/143903
ISSN: 0957-4484
DOI: 10.1088/0957-4484/27/41/415204
期刊: NANOTECHNOLOGY
Volume: 27
Appears in Collections:Articles