Details

Autor(en) / Beteiligte

• Sauvan, C
• Lecamp, G
• Lalanne, P
• Hugonin, J

Titel

Modal-reflectivity enhancement by geometry tuning in Photonic Crystal microcavities

Ist Teil von

• Optics express, 2005-01, Vol.13 (1), p.245-255

Ort / Verlag

United States

Erscheinungsjahr

2005

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• When a guided wave is impinging onto a Photonic Crystal (PC) mirror, a fraction of the light is not reflected back and is radiated into the claddings. We present a theoretical and numerical study of this radiation problem for several three-dimensional mirror geometries which are important for light confinement in micropillars, air-bridge microcavities and two-dimensional PC microcavities. The cause of the radiation is shown to be a mode-profile mismatch. Additionally, design tools for reducing this mismatch by tuning the mirror geometry are derived. These tools are validated by numerical results performed with a three-dimensional Fourier modal method. Several engineered mirror geometries which lower the radiation loss by several orders of magnitude are designed.