Debashree Banerjee

Silicon Phononics for thermoelectric generation

 

We are working towards enhancement of the thermoelectric figure of merit of Silicon through artificial structures with the aim of using the material for thermoelectric power generation.

 

Design, Fabrication and Experimental Characterization of III-Nitride Based Light Sources

 

• Developed a Gallium Nitride (GaN) based dilute magnetic semiconductor (DMS) which is ferromagnetic at room temperature.

• The DMS was used successfully for injecting spins into the spin-LED for temperatures as high as 200 K.

• Novel method of obtaining quantum/nano-wires in a top-down approach.

• Observed superluminescent behavior in a lateral InGaN-based nanowire LED.

• Nanowire laser shows onset of lasing at low threshold current densities.

• Transient behavior under femtosecond pulsed laser excitation of materials to understand their transient behaviour .

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Studies on the Properties of LHM Structures for Microwave and Millimeter-wave Applications

 

In the project we obtained an understanding of the left handed material properties theoretically and investigated the effect of the geometry of the split ring resonators and cut lines on the resonant frequency. Different structures and substrates were studied for the purpose.