Low dimensional materials such as 1D and 2D materials have been under extensive investigations for optoelectronic and energy generation applications. In this project, we aim to find new devices at the nanoscale, particularly in the field of electronics, photonics, and sensors using low dimensional devices. Materials such as MoS2,MoSe2, WS2, WSe2, graphene, and black phosphorus are new emerging devices that have not been fully investigated yet. These materials exhibit exceptional electrical, optical, and mechanical properties at the nanoscale. At the nanoscale, these materials can have tunable band gaps, which makes them attractive for various applications including biomedical, military, and energy applications.
In this project, novel low dimensional materials such as 1D and 2D materials are being used to create devices such as flexible electronics, nano-solar cells, optoelectronics at the nanoscale, hydrogen sensors, and biological sensors. We use Raman spectroscopy to characterize these devices at the nanoscale. Along with Raman, we use conventional current-voltage characteristics to compare the obtained transfer characteristics to state-of-the-art technologies such as MOSFETs. Using pulsed heating, we were able to show that these materials, such as layered black phosphorus can be a good source for nano-emitters with a large optical bandwidth, which makes it desirable for optical communication applications. We aim to deign nano-LEDs and nanolasers using this concept. We also aim to engineer and design different layers using laser treatments, as in the case of MoS2. Our results shed light on designing nano-optoelectronics with the desired band gap and thickness.