Reflections on past few months

I hope to finish my PhD soon as i wait for the finishing touches to be added and eventually defend my work on this vast field of quantum physics. I have worked on various devices from quantum well to quantum dot laser devices, and i have learnt as much as i could to understand their behavior. I have met very interesting people along the way and especially Prof. Emeritus Alf Adams whose contribution in semiconductor lasers is undeniably most important in the last 3 decades. Monday 27 we will be going to Royal Society of London to attend his presentation along with dignitaries and royals. So not bad choice at all to embark on this journey to understand the Physics of everything.

Finally Thesis is submitted

After a long period of sleepless nights and very tiring long hours, the work is 80% done.. the thesis is submitted and hopefully will come back with positive review. This signify the importance of the journey i started 3 years ago...i can happily say i am almost there. Definitely i know that i belong to quantum physics and i will take all efforts within my power to use the knowledge for the benefit of my people. Even though Africa has not acknowledge my presence but i am sure that i belong to the group of few who should stand and rise with Africa in technological advances. through my presentation of my work in different continents i noticed that handful of people are of African origin in these advanced science international conferences. it does not mean that Africa does not have universities pursuing advanced technologies rather their participation is almost unknown. Next job for me will be pionering the activation of African intelectuals to fully participate in the global community of advanced science.....

Reflection on past years

I should Thank Almighty God for all opportunities and missed-opportunities that came my way over the past years. for sure nothing happens in this world or this universe without a reason.

Amazing Bugs and their complex structures

Images I took using Scanning Electron Microscopy (SEM), showing a bug with silvery looking hair which amazingly the colour is structural and not pigment as your eyes could suggest and the focused image showing many lenses in the eye of the bug. one eye could contain hundreds of the small 25 micron wide hexagonal shaped lenses, that serve both for sight and camouflage as the facets have anti-reflection properties. so next time before you swat a fly think how complex it is and what we could benefit from understanding their structures.

KTA (Knowledge Transfer Account)..

Thank God, I am almost there...I have been busy writing up my three years in PhD life...I thank God for blessing me with a job before i submit my thesis..I will be working as Research Fellow for knowledge transfer between the University and one of the leading companies in 3D technologies. enhancement of 3D stereoscopic for real life application is now my focus.....it is all about circularly polarised light and little bit of brain manipulation.....

The secrets of Wet Etching on III-V Semiconductor materials

Wet etching is a fine tuned art of removing layers of materials from substrates or devices when milling using Focused Ion Beam (FIB) is not an option.

When FIB is used to make trenches on a laser device, some of the Gallium (Ga) ions are deposited on the face of trenches as the depth of milling is increased. This can compromise the characteristics of the device such that you may turn a diode into a resistor.

To remove the deposition of unwanted debris from the side walls of your trenches wet etch can be very useful. Timing in wet etching is everything otherwise you might end up losing the whole device.

Pictures taken using Scanning Electron Microscopy (SEM) are showing the effect of wet etch before and after the process. Cleaner surfaces can be seen after wet etching.

Success on Gain Measurements

For a couple of months i have been working on a project to develop new method to measure laser gain. i am happy to announce that i have been successful and the method works..watch out for papers that will be published soon on American Physics Letters (APL) or Journal of Quantum electronics (JQE).....