Fig. 6: Full-duplex audio communication using the monolithic multicomponent system.
From: Full-duplex light communication with a monolithic multicomponent system
a Schematic of full-duplex audio communication using light. b Audio signals received at the circular MQW-diode with zero bias. c Audio signals received at the circular MQW-diode with a bias voltage of 4.0 V. d Superimposed signals under the simultaneous emission-detection condition
