Abstract
Lowering the operating voltage of electro-optic modulators is desirable
for a variety of applications, most notably in analog photonics and digital
data communication. In particular for digital systems such as CPUs, it is
desirable to develop modulators that are both temperature-insensitive and
compatible with typically sub-2 V CMOS electronics; however, drive voltages
in silicon-based Mach–Zehnder interferometers (MZIs) currently exceed
1.8 V. Here, we show an MZI modulator based on an electro-optic polymer-clad
silicon slot waveguide, with a halfwave voltage of only 0.69 V (corresponding
to a 0.62 V$\left(\cdot\right)$cm modulation figure of merit), and a bandwidth of 500 MHz. We also
show that there are paths to significantly improve both the bandwidth and
drive voltage.
© 2011 IEEE
PDF Article
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