Optoelectronic Devices


Optoelectronic device research has been undertaken at the University of Essex for over 30 years, starting with the advent of quantum well structures in the 1980’s. In the early days the work was concentrated on material assessment through photoluminescence and mobility studies as a function of temperature down to 4K. As material quality developed the studies moved to devices, firstly chasing telecommunication transmitters and receivers at 1500nm. Initial photoluminescence studies were complimented with studies of the electrical and optical properties of early devices. Today the Essex group studies the latest novel materials and devices which include dilute nitride and bismide, and sophisticated structures, designed using both in-house and commercial software

Theoretical part (approx 2 hrs)

In this lecture I will review the history of optoelectronic research at the University of Essex, highlighting the contributions of Prof Brian Ridley, Prof Naci Balkan, and Dr Nick Constantinou. This will be followed by a description of the experimental techniques used to study optoelectronic devices including, photoluminescence, electroluminescence, spectral photocurrent, transient photoconductivity, as well as standard assessment techniques. The seminar will end with an overview of experimental control focusing on the use of LabView.

Practical element (approx 2 hrs)

In this part the participants will undertake a tutorial on LabView and work to develop a simple control system for a test experiment. Although previous experience of LabView is not essential it would be beneficial to be at least familiar with the tool.


[This tutorial is dedicated to the memory of Naci Balkan and Nick Constantinou]