The use of silicon superlattices is a well established technique for creating nanocrystals. Depositing superlattices allows
for adjustment of nanocrystal properties, such as the emission wavelength, by varying the silicon layer thickness.
Opposed to the silicon layer, the silicon dioxide thickness effects are not documented as extensively. This study looks at
superlattice films with silicon and silicon dioxide layers varying from 0.4 to 0.8 nm and 2.7 to 5.1 nm respectively,
deposited via a plasma enhanced chemical vapor deposition. Photoluminescence and electroluminescence measurements
were taken to show an increase in the output intensity increased oxide thickness.
Modern high frequency applications necessitate the utilization of the millimeter wave band. Slot waveguides have
previously been used for electro optic modulators as the enhancement of the electric field strength in the slot creates a
large overlap with the electro optic material. We present a design that utilizes the field enhancement provided by a slot
waveguide geometry for both the optical field and the RF modulating field. The dual RF and optical slot configuration
maximizes the overlap of the optical field and the modulating field in the electro optic material, creating the maximum
amount of phase change per applied volt of modulating signal. This design presents unique fabrication challenges.
Organic electro-optic materials, or "EO polymers," offer much higher nonlinearities than traditional crystalline
materials, making these materials ideal for next generation electro-optic modulators. These materials require an
additional processing step known as poling, which reorients the chromophores through the application of a high electric
field. This effort will focus on corona poling, where a gas is ionized and the electric field across the sample is applied
through the relocation of charged ions. The proposed technique avoids the need to raise the temperature of the material
by applying the electric field while the material is deposited in solution phase. This process can overcome the thermal
stability tradeoff in many organic electro-optic materials, and preliminary results indicate this process results in an
enhancement in the electro-optic activity of the material.