| dc.identifier.uri | http://hdl.handle.net/11401/77448 | |
| 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 | |
| dc.format.medium | Electronic Resource | en_US |
| dc.language.iso | en_US | |
| dc.publisher | The Graduate School, Stony Brook University: Stony Brook, NY. | |
| dc.type | Dissertation | |
| dcterms.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. | |
| dcterms.available | 2017-09-20T16:52:43Z | |
| dcterms.contributor | Kamoua, Ridha | en_US |
| dcterms.contributor | Donetski, Dmitri | en_US |
| dcterms.contributor | Shterengas, Leon | en_US |
| dcterms.contributor | Cubaud, Thomas. | en_US |
| dcterms.creator | Singh, Thakur Siddharth | |
| dcterms.dateAccepted | 2017-09-20T16:52:43Z | |
| dcterms.dateSubmitted | 2017-09-20T16:52:43Z | |
| dcterms.description | Department of Electrical Engineering | en_US |
| dcterms.extent | 123 pg. | en_US |
| dcterms.format | Application/PDF | en_US |
| dcterms.format | Monograph | |
| dcterms.identifier | http://hdl.handle.net/11401/77448 | |
| dcterms.issued | 2016-12-01 | |
| dcterms.language | en_US | |
| dcterms.provenance | Made available in DSpace on 2017-09-20T16:52:43Z (GMT). No. of bitstreams: 1
Singh_grad.sunysb_0771E_13132.pdf: 5587190 bytes, checksum: 48b4e0bb96f687027fa9f61a593d729a (MD5)
Previous issue date: 1 | en |
| dcterms.publisher | The Graduate School, Stony Brook University: Stony Brook, NY. | |
| dcterms.subject | Electrical engineering | |
| dcterms.subject | Electronic Oscillators, Graphene, Monte Carlo Device Simulation, Quantum Cascade Laser, Semiconductor device physics | |
| dcterms.title | Investigations of electronic and optical sources in the mid infrared and terahertz regions | |
| dcterms.type | Dissertation | |
