{"@context":"http://iiif.io/api/presentation/2/context.json","@id":"https://repo.library.stonybrook.edu/cantaloupe/iiif/2/manifest.json","@type":"sc:Manifest","label":"Mid-infrared GaSb-based Type-I Quantum Wells Diode Lasers Utilizing Cascade Pumping Scheme","metadata":[{"label":"dc.description.sponsorship","value":"This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree."},{"label":"dc.format","value":"Monograph"},{"label":"dc.format.medium","value":"Electronic Resource"},{"label":"dc.identifier.uri","value":"http://hdl.handle.net/11401/77473"},{"label":"dc.language.iso","value":"en_US"},{"label":"dc.publisher","value":"The Graduate School, Stony Brook University: Stony Brook, NY."},{"label":"dcterms.abstract","value":"Mid infrared semiconductor diode lasers have broad range of applications, including light detection and ranging, infrared countermeasures, medical treatment and spectroscopy. Compact and efficient devices operating in continuous-wave (CW) regime at room temperature (RT) are preferred for those applications. This work is focusing on the development of GaSb-based type-I quantum wells (QWs) diode lasers in the spectral range of 2.2 - 3.4 \u00b5m, with high output power and Diffraction-Limited beam. The novel design of cascade type-I QWs diode lasers was proposed. The interband tunneling through the " leaky" window in band alignment at GaSb/InAs heterointerface was used to realize cascade pumping of type-I GaSb QWs in the device active region. The GaSb/InAs tunnel junction required only moderate n-doping on InAs side and, thus, did not generate excessive absorption losses despite being located near the transfer mode peak. The two-stage cascade design provides twofold increase of the device slope efficiency as compared to that of single stage diode lasers. Corresponding high CW power RT operated 2.4 - 3.3 \u00b5m two-stage cascade diode lasers were fabricated. The cascade structure was further optimized to improve the QW optical confinement factor, and the threshold current density was reduced. The two- and three-stage cascade diode lasers demonstrated CW output power of 650 mW and 960 mW at 3 \u00b5m in RT, respectively. Diffraction-Limited and distributed feedback diode lasers with narrow ridge waveguide were designed and fabricated. Various etching techniques (wet etching, Cl2-free and Cl2-based dry etching) were developed to improve the etching profile and lasers performance. Diffraction-Limited cascade diode lasers demonstrated CW output power of 100 mW at 3 \u00b5m, and 40 mW at 3.15 \u00b5m in RT, respectively. Distributed feedback 3.27 μ m diode lasers demonstrated CW output power of 15 mW at RT."},{"label":"dcterms.available","value":"2017-09-20T16:52:46Z"},{"label":"dcterms.contributor","value":"Shterengas, Leon"},{"label":"dcterms.creator","value":"Liang, Rui"},{"label":"dcterms.dateAccepted","value":"2017-09-20T16:52:46Z"},{"label":"dcterms.dateSubmitted","value":"2017-09-20T16:52:46Z"},{"label":"dcterms.description","value":"Department of Electrical Engineering."},{"label":"dcterms.extent","value":"131 pg."},{"label":"dcterms.format","value":"Monograph"},{"label":"dcterms.identifier","value":"http://hdl.handle.net/11401/77473"},{"label":"dcterms.issued","value":"2015-08-01"},{"label":"dcterms.language","value":"en_US"},{"label":"dcterms.provenance","value":"Made available in DSpace on 2017-09-20T16:52:46Z (GMT). No. of bitstreams: 1\nLiang_grad.sunysb_0771E_12174.pdf: 4398687 bytes, checksum: d7ebce3b1da9a7670f1758d6094d9665 (MD5)\n  Previous issue date: 2014"},{"label":"dcterms.publisher","value":"The Graduate School, Stony Brook University: Stony Brook, NY."},{"label":"dcterms.subject","value":"cascade, Diode, GaSb, infrared, Laser, type-I"},{"label":"dcterms.title","value":"Mid-infrared GaSb-based Type-I Quantum Wells Diode Lasers Utilizing Cascade Pumping Scheme"},{"label":"dcterms.type","value":"Dissertation"},{"label":"dc.type","value":"Dissertation"}],"description":"This manifest was generated dynamically","viewingDirection":"left-to-right","sequences":[{"@type":"sc:Sequence","canvases":[{"@id":"https://repo.library.stonybrook.edu/cantaloupe/iiif/2/canvas/page-1.json","@type":"sc:Canvas","label":"Page 1","height":1650,"width":1275,"images":[{"@type":"oa:Annotation","motivation":"sc:painting","resource":{"@id":"https://repo.library.stonybrook.edu/cantaloupe/iiif/2/15%2F56%2F08%2F155608179447074786941468138898411352855/full/full/0/default.jpg","@type":"dctypes:Image","format":"image/jpeg","height":1650,"width":1275,"service":{"@context":"http://iiif.io/api/image/2/context.json","@id":"https://repo.library.stonybrook.edu/cantaloupe/iiif/2/15%2F56%2F08%2F155608179447074786941468138898411352855","profile":"http://iiif.io/api/image/2/level2.json"}},"on":"https://repo.library.stonybrook.edu/cantaloupe/iiif/2/canvas/page-1.json"}]}]}]}