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Investigations of electronic and optical sources in the mid infrared and terahertz regions

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dc.contributor.advisor Kamoua, Ridha en_US
dc.contributor.author Singh, Thakur Siddharth en_US
dc.contributor.other Department of Electrical Engineering en_US
dc.date.accessioned 2017-09-20T16:52:43Z
dc.date.available 2017-09-20T16:52:43Z
dc.date.issued 2016-12-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/77448 en_US
dc.description 123 pgs en_US
dc.description.abstract Fundamental sources of mid-infrared and terahertz radiation are of the utmost importance for applications such as chemical sensing, molecular spec- troscopy, imaging and telecommunications to name a few. Practical realiza- tions of room temperature fundamental sources in the terahertz region are often hampered by low power and poor temperature performance and this is referred to as the Terahertz gap. This work presents investigations of Quantum Cascade Lasers (QCL) as optical sources of mid-infrared radiation and the proposal of a novel electronic oscillator in the extremely important terahertz region based on a single layer of a suspended graphene sheet. Monte Carlo simulations of electron and photon transport have been per- formed on both device concepts. Firstly, the transport models were validated by simulating existing devices from other research groups which have been fabricated and tested. The simulation results of the Monte Carlo model were shown to be in good agreement with experimental data. An injectorless and compact QCL design was proposed. Simulations showed enhanced optical gain, improved temperature performance and very stable and low thresh- old current densities over a wide temperature range over conventional QCL designs. A new type of an electronic oscillator based on a single layer of suspended graphene was simulated demonstrating oscillations up to 800 GHz in the ter- ahertz region of the electromagnetic spectrum at room temperature. The proposed device concept could potentially provide a much needed fundamen- tal source in the terahertz region. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Electrical engineering en_US
dc.subject.other Electronic Oscillators, Graphene, Monte Carlo Device Simulation, Quantum Cascade Laser, Semiconductor device physics en_US
dc.title Investigations of electronic and optical sources in the mid infrared and terahertz regions en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Donetski, Dmitri en_US
dc.contributor.committeemember Shterengas, Leon en_US
dc.contributor.committeemember Cubaud, Thomas en_US

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