Unravelling the mysteries of the complex neural network dynamics of the brain is of utmost importance to science as it might lead to a deeper understanding of perception, cognition and consciousness. Numerous techniques are being used for brain imaging including intracellular electrophysiology, calcium imaging and microelectrode arrays imaging. However, all these technologies are facing severe limitations in the spatio-temporal resolutions and are thus unable to resolve fast real-time single neuron activity over a larger area of the brain. I will discuss our recent efforts in developing a new technique for neuroscience that offer wide-field brain imaging with unprecedented spatio-temporal resolution. It is based on magnetic field sensing of the neuron activity using magneto-optically sensitive Nitrogen-Vacancy color centers in a diamond crystal combined with light microscopy.
In this contribution, we excite surface plasmon polaritons propagating along a silver nano-wire by a single nitrogenvacancy center located in a diamond nano-crystal. By using the tip of an atomic force microscope, a second nano-wire is brought into the evanescent field of the first wire such that surface plasmons can evanescently couple. In our experiment, we are able to tune the coupling strength from one nano-wire to another by adjusting the gap with the aid of the atomic force microscope. Numerical calculations of the coupling strength are carried out, which support the values found in the experiment.
We demonstrate light color conversion in patterned InGaN light-emitting diodes (LEDs), which is enhanced via non-radiative exciton resonant energy transfer (RET) from the electrically driven diode to colloidal semiconductor nanocrystals (NCs). Patterning of the diode is essential for the coupling between a quantum well (QW) and NCs, because the distance between the QW and NCs is a main and very critical factor of RET. Moreover, a proper design of the pattern can enhance light extraction.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.