You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
High performance GaAlAs/GaAs heterostructure avalanche photodiodes (APD) have been fabricated. The spectral response of these devices are from 0.48 μm to 0.89 μm. The quantum efficiency at unity gain is as high as 95%. Microwave gain (273 MHz) of 42 dB has been observed in these devices. Dark current is extremely low ~ l0 -12 A at half the breakdown voltage. Low noise characteristics of the Read structure APD cannot be verified at this moment because of the poorer performance than the traditional LPE heterostructure APD. With careful design, III-V heterostructure photodiode can have response time as low as 5 ps.
The alert did not successfully save. Please try again later.
H. D. Law, K. Nakano, J. J. Coleman, "GaAlAs/GaAs Avalanche Photodetectors," Proc. SPIE 0272, High Speed Photodetectors, (28 July 1981); https://doi.org/10.1117/12.965692