Probe for neural recording and optical spectroscopic interrogation
In various embodiments, a probe includes at least one shank, optical components disposed within the shank for transmitting light into a sample and collecting light from the sample, and electrical components disposed within the shank for recording an electrical signal from the sample. In certain embodiments, a method includes collecting light from the sample using a first shank of the probe, recording an electrical signal from the sample using a second shank of the probe, and analyzing the collected light and the electrical signal.
1. A transmissive spectroscopic probe, comprising:
a first shank comprising light transmitting optical components disposed within the first shank and configured to transmit light into a sample and towards a second shank of the probe;
the second shank spaced between about 20 microns and 1000 microns away from the first shank and comprising light receiving optical components disposed within the second shank and configured to collect at least a portion of the light transmitted into the sample by the light transmitting optical components; and
electrical components disposed within at least one of the first shank and the second shank for recording an electrical signal from the sample.
2. The probe of claim 1 , further comprising at least one waveguide for transmitting light through the first shank and/or the second shank.
3. The probe of claim 2 , wherein the at least one waveguide comprises a photodefinable polymer.
4. The probe of claim 1 , wherein the light transmitting and light receiving optical components are each in optical communication with at least one aperture defined by the first shank and the second shank.
5. The probe of claim 1 , wherein the electrical components comprise an electrode.
6. The probe of claim 1 , wherein a separation distance between the first shank and the second shank is about 100 microns.
7. The probe of claim 1 , wherein the first shank and the second shank have a width and a depth, each of which is between about 10 microns and about 100 microns.
8. The probe of claim 7 , wherein the width is about 25 microns and the depth is about 10 microns.
9. The probe of claim 1 , wherein the electrical components are further configured to apply a voltage to the sample.
10. The probe of claim 1 , wherein the sample comprises neural tissue.
11. A system, comprising:
a light source;
a probe comprising:
i) a first shank comprising:
light transmitting optical components configured to transmit light into a sample;
ii) a second shank spaced between about 20 microns and 1000 microns away from the first shank and comprising:
light receiving optical components configured to collect light from the sample; and
iii) electrical components disposed within the first shank and the second shank for recording an electrical signal from the sample;
a photo-detector;
a plurality of external waveguides for transmitting light from the light source to the probe and from the probe to the photo-detector; and
a controller configured to spectrographically analyze a light signal collected by the second shank.
12. The system of claim 11 , wherein the electrical components are further configured to apply a voltage to the sample.