Tailoring Mechanically Tunable Strain Fields in Graphene

Pseudomagnetic fields and triaxial strain in graphene

Mechanically Tunable Photonic Crystals

The next frontier in photonic crystal research may be to achieve dynamic tunability that allows real-time, on-demand control of the photonic band structure. Recently, researchers have been working on a new strategy for achieving this goal—by applying mechanical force. This approach can produce much greater tunability than is possible with electro-optic materials and may greatly expand the usefu...

Tunable Wideband Graphene based Filters in THz Band

In this paper, a procedure for analyzing and designing of tunable wideband band-pass and band-stop graphene based filters in the terahertz band is proposed. These planar wideband plasmonic filters are unique in their kind. With this procedure, it is possible to design filters with the desired functional characteristics in the form of the similar quarter-wavelength resonance stubs. The discontin...

Mechanically tunable photonic crystal structure

We report a tunable nanophotonic device concept based on flexible photonic crystal, which is comprised of a periodic array of high-index dielectric material and a low-index flexible polymer. Tunability is achieved by applying mechanical force with nano-/microelectromechanical system actuators. The mechanical stress induces changes in the periodicity of the photonic crystal and consequently modi...

Tailoring Strain in Microelectronic Devices

The central device of this thesis is the transistor. It acts like a faucet, but then for electric charge. There is a connection that is called the source, just like the water company. And the charge flows into the drain. Finally there is a handle, here called the gate, to control the flow of charge. The transistor is not an ideal faucet for electrons. For example, even when the gate is closed a...