An ultra-narrow spectral linewidth photodetector operating at a long wavelength

作者：Huang Hui^*; Ren Xiaomin; Wang Xingyan; Cui Hailin; Wang Wenjuan; Wang Qi; Huang Yongqing

来源：Semiconductor Science and Technology, 2006, 21(12): 1724-1727.

DOI：10.1088/0268-1242/21/12/038

We demonstrate a tunable wavelength-selective photodetector which operates at a long wavelength. The device was fabricated by bonding a GaAs-based Fabry-Perot filter, which can be tuned via thermal-optic effects, with an InP-based p-i-n absorption structure. Device performance was theoretically investigated by considering the finite-size diffracting-beam input which is the normal case in practical conditions. We show that the size of the input diffracting-beam has a significant impact on device external quantum efficiency as well as the response linewidth. An integrated device with spectral linewidth as narrow as 0.7 nm (FWHM), wavelength tuning range of 9.0 nm (1540.9 nm similar to 1549.9 nm), 3 dB bandwidth of 10 GHz and external quantum efficiency of about 18% was demonstrated.

• 出版日期2006-12
• 单位北京大学