Title :
Monolithic integration of optical neurochip with variable sensitivity photodetector
Author :
Nitta, Y. ; Ohta, J. ; Tai, S. ; Kyuma, K.
Author_Institution :
Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
A monolithic integration of an optical neurochip with variable interconnection capability is reported. The neurochip is a three-dimensional optoelectronic integrated circuit, in which a variable sensitivity photodetector is directly fabricated on a light emitting diode. The principle of operation and the fundamental characteristics of the monolithic neurochip are described in detail. The optical crosstalk was significantly reduced and the optical coupling efficiency between the light emitting diode and the variable sensitivity photodetector was improved as compared to the previous hybrid structure. The monolithic neurochip is suitable for a large scale integration because there is little optical crosstalk, high efficiency, and no need of optical alignment.<>
Keywords :
crosstalk; integrated optoelectronics; light emitting diodes; neural chips; optical interconnections; optical neural nets; photodetectors; high efficiency; large scale integration; light emitting diode; monolithic integration; optical coupling efficiency; optical crosstalk; optical neurochip; three-dimensional optoelectronic integrated circuit; variable interconnection capability; variable sensitivity photodetector; Integrated circuit interconnections; Integrated optics; Light emitting diodes; Monolithic integrated circuits; Optical coupling; Optical crosstalk; Optical interconnections; Optical sensors; Photodetectors; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
