Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric field switching in a resonant tunneling diode electroabsorption
  modulator   The basic mechanism underlying electric field switching produced by a
resonant tunnelling diode (RTD) is analysed and the theory compared with
experimental results; agreement to within 12% is achieved. The
electro-absorption modulator (EAM) device potential of this effect is explored
in an optical waveguide configuration. It is shown that a RTD-EAM can provide
significant absorption coefficient change, via the Franz-Keldysh effect, at
appropriate optical communication wavelengths around 1550 nm and can achieve up
to 28 dB optical modulation in a 200 um active length device. The advantage of
the RTD-EAM, over the conventional reversed biased pn junction EAM, is that the
RTD-EAM has in essence an integrated electronic amplifier and therefore
requires considerably less switching power.

14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat