Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rapid voltage sensing with single nanorods via the quantum confined
  Stark effect   Properly designed colloidal semiconductor quantum dots (QDs) have already
been shown to exhibit high sensitivity to external electric fields via the
quantum confined Stark effect (QCSE). Yet, detection of the characteristic
spectral shifts associated with the effect of QCSE has traditionally been
painstakingly slow, dramatically limiting the sensitivity of these QD sensors
to fast transients. We experimentally demonstrate a new detection scheme
designed at achieving shot-noise limited sensitivity to emission wavelength
shifts in QDs, showing feasibility for their use as local electric field
sensors on the millisecond time scale. This regime of operation is already
potentially suitable for detection of single action potentials in neurons at a
high spatial resolution.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess