[14p-B414-1~9] THｚ赤外帯フォトニクス応用展開を志向したナノ材料科学

▲ [14p-B414-8] Phase-Change Infrared Photonics

〇Toshiharu Saiki¹、Masashi Kuwahara² (1.Keio Univ.、2.AIST)

キーワード：phase-change materials, microcavity, surface phonon polariton

In this presentation, we discuss two possible applications of modification of infrared light confinement in a microcavity using a phase-change material. In the first topic, we propose a method to encode a subwavelength image into the infrared optical spectrum. A silicon microcavity is used to generate light confinement modes with a variety of field distributions and a wide range of resonant peaks. The spectrum can be modified due to the change in refractive index of the phase-change film. The second topic includes control of surface phonon polariton (SPhP) confinement with phase change material for tunable surface enhanced infrared spectroscopy. We employ “phase-change reflection mirrors” to confine the SPhP. Narrow absorption band and the tunability of SPhP supported by SiC are experimentally demonstrated.