Yaman Mecit, Kondakci H Esat, Bayindir Mehmet
1UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
Opt Express. 2010 Feb 1;18(3):3168-73. doi: 10.1364/OE.18.003168.
Te-enriched chalcogenide glass Ge(15)As(25)Se(15)Te(45) (GAST) is synthesized, thermo-optically characterized and used to fabricate a one dimensional photonic crystal cavity mode that is dynamically and reversibly tuned by temperature modulation. The optical cavity mode is designed using GAST and As(2)S(3) glasses after fully determining their temperature dependence of the complex refractive indices in the visible and near infrared spectrum using spectroscopic ellipsometry. By making use of the very large thermo-optic coefficient (dn/dT = 4 x 10(-4)/ degrees C) of GAST glass at 1.2 mum, the cavity mode of the multilayer was tuned reversibly more than 16 nm, which is, to the best of our knowledge, an order of magnitude larger for this kind of cavity modulation. Wide and dynamical spectral tuning of low bandgap chalcogenide glasses via temperature modulation can be utilized in photonic crystal based integrated optics, quantum dot resonance matching, solid state and gas laser components, and infrared photonic crystal fibers.
合成了富碲硫属化物玻璃Ge(15)As(25)Se(15)Te(45)（GAST），对其进行了热光特性表征，并用于制造一维光子晶体腔模，该腔模可通过温度调制进行动态和可逆调谐。在使用光谱椭偏仪充分确定GAST和As(2)S(3)玻璃在可见光和近红外光谱中复折射率的温度依赖性之后，利用它们设计了光学腔模。通过利用GAST玻璃在1.2μm处非常大的热光系数（dn/dT = 4×10(-4)/℃），多层结构的腔模可逆调谐超过16nm，据我们所知，对于这种腔调制而言，这要大一个数量级。通过温度调制对低带隙硫属化物玻璃进行宽范围和动态的光谱调谐可应用于基于光子晶体的集成光学、量子点共振匹配、固态和气体激光组件以及红外光子晶体光纤。
