Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Broadband on-chip optical non-reciprocity using phase modulators   Breaking the reciprocity of light propagation in photonic integrated circuits
(PIC) - especially in the CMOS-compatible silicon-on-insulator platform - is a
topic of intense research. However, a practical solution for monolithic
integrating of optical isolators and circulators remains elusive. Here, we
propose and analyze a new non-reciprocal photonic architecture operating with
standard single-mode waveguides (or optical fibers). Our design exploits
cascaded phase modulators separated by optical delay lines and suitably driven
by time shifted waveforms. Because it is based on fully balanced
interferometers and does not involve resonant structures, our scheme is also
intrinsically broadband. Using realistic parameters we calculate an extinction
ratio superior to 20 dB and insertion loss below -3 dB.

22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg