New position at King’s College London

I’m pleased to announce that I’ve moved to King’s College London, as a Lecturer in Advanced Photonics. I will be continuing my research on rotational opto- and electro-mechanics.

Posted in Uncategorized | Leave a comment

Quantum Revivals proposal online

New paper online! In this work, we propose a feasible experiment for measuring orientational revivals with a 50nm long cylinder. This is a purely quantum effect, arising from quantization of angular momentum, and interference of different orientations.


Posted in Uncategorized | Leave a comment

Hot Topic at the Gordon Research Conference

Every two years, I love to attend the Gordon Research Conference, “Mechanical systems in the quantum regime”, which brings together the biggest names in my field, with an encouragement to present breaking results.

This year was particularly exciting for me, as for the first time I presented a poster on my very own work (see below), and I was invited to deliver a “Hot Topic” talk on our research in Vienna.

Click picture to get full size image:

Posted in Uncategorized | Leave a comment

Levitated electromechanics paper online

Here, we propose a new scheme, where levitated particles are coupled to, and controlled by, electrical circuits. To be built soon!

Levitated electromechanics: all-electrical cooling of levitated nano- and micro-particles

Posted in Uncategorized | Leave a comment

Microcavity paper published

Our work on detection of nanoparticles in Silicon microcavities has been published in Applied Physics Letters. This technology will be really important for controlling smaller nanoparticles, and in turn realising a quantum physics with massive objects.

Posted in Uncategorized | Leave a comment

Optomechanics tutorial online

You can find a free video & audio recording of my Optomechanics tutorial lecture from SPIE Optics + Photonics 2017, by clicking on the image below:

You can site it in the following way:

James Millen, “Tutorial on optomechanics (Conference Presentation)”, Proc. SPIE 10347, Optical Trapping and Optical Micromanipulation XIV, 103471E (25 September 2017);



Posted in Uncategorized | Leave a comment

Snazzily titled paper published

It only took 308 days, but we just had some new research published in Nature Communications.

It was a completely surprising piece of work; we were able to levitate a tiny silicon cylinder, and make it tick like the hands of the worlds most perfect clock. No physical man-made object has ever rotated in such a perfect way. Our nano-watch only lost one millionth of a second over four days.

This is useful, because we can detect even the tiniest changes to the motion of our little watch-hands, meaning we can shove it places and detect all kinds of interesting, hard to measure things.

You can read Optically driven ultra-stable nanomechanical Rotor here.

Posted in Uncategorized | Leave a comment