Birefringence of GaN/AlGaN optical waveguides

Birefringence of GaNÕAlGaN optical waveguides

We have experimentally studied the birefringence of wurtzite GaN grown on a sapphire substrate. The measurements were done with single-mode GaN/AlGaN planar optical waveguides on c-plane grown heterostructure films. The refractive indices were found to be different for signal optical field perpendicular or parallel to the crystal c axis (n'Þn i). More importantly, we found an approximately 10% ...

وابستگی انرژی گذارهای اپتیکی در نانوساختارهای چاههای کوانتومی GaN/AlGaN به پهنای سد و چاه کوانتومی

Internal polarizations field which take place in quantum structures of group-III nitrides have an important consequence on their optical properties. Optical properties of wurtzite AlGaN/GaN quantum well (QW) structures grown by MBE and MOCVD on c-plane sapphire substrates have been investigated by means of photoluminescence (PL) and time resolved photoluminescence (TRPL) at low-temperature. PL ...

Fabrication and optical studies of AlGaN/GaN quantum-well waveguides

Characterization of Coplanar Waveguides on AlGaN/GaN HEMT on Silicon Buffer Layers up to 110 GHz

*Corresponding author email: [email protected] Abstract In the present work we report the characterization of coplanar waveguides (CPWs) implemented on AlGaN/GaN HEMT layers deposited on high-resistivity silicon (HR-Si) substrates, up to frequencies as high as 110 GHz. The topic is of interest because it is fairly widely held in the community that substrate losses could hinder the application of...

شبیه‌سازی گاز دوبعدی در ALGaN / GaN HEMT و بررسی ولتاژ شکست آن

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