The laboratory is equipped with a state of the art Cryogen Free Dilution Refrigerator (Oxford Triton 200) to cool down the devices to about 10 mK, enabling the study of quantum phenomena in a low noise environment. The dilution fridge is equipped with several heavily filtered microwave and DC lines to enable simultaneous measurement of multiple devices in an extremely low noise environment.
We are fully equipped to perform complex microwave frequency experiments with several microwave generators (frequencies up to 20 GHz), Vector Network Analyzer, Spectrum Analyzer, High Speed Arbitrary Waveform Generators, IQ mixers, RF Amplifiers, High Speed Digitizers, FPGA Modules with multi-channel DACs and ADCs and miscellaneous RF components.
The superconducting devices are fabricated using electron-beam and optical lithography in the TIFR NANOFABRICATION FACILITY. In addition, we have RIE, PECVD, ALD, various sputtering systems and plasma etching capabilities.
For metal deposition, we have a custom, two chamber, e-beam evaporator designed together with Excel Instruments, Mumbai who also built the vacuum parts and assembled the full system on-site. The system has a six pocket Telemark E-beam source with a solid state power supply. The main chamber is pumped with a CTI cryopump while a rotary pump is used to pump out the load lock chamber initially. The sample stage has continuous rotation (motorized) and can be tilted manually as well. In the future, we plan to install an Ion source on the load lock chamber.
We can fabricate custom RF circuit boards with metal plated vias using our LPKF PCB Prototyping machine.