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dc.contributor.authorGeiser, Markus
dc.contributor.authorPfluegl, Christian J.
dc.contributor.authorBelyanin, A
dc.contributor.authorWang, Qi Jie
dc.contributor.authorYu, Nanfang
dc.contributor.authorBelkin, M. A.
dc.contributor.authorEdamura, T
dc.contributor.authorKan, H
dc.contributor.authorFischer, M
dc.contributor.authorWittmann, A
dc.contributor.authorFaist, J
dc.contributor.authorCapasso, Federico
dc.date.accessioned2011-08-03T15:37:55Z
dc.date.issued2010
dc.identifier.citationGeiser, M., Christian J. Pflugl, A. Belyanin, Qi Jie Wang, Nanfang Yu, M. A. Belkin, T. Edamura, et al. 2010. Surface-emitting Thz sources based on difference-frequency generation in mid-infrared quantum cascade lasers. Paper presented at the Novel In-Plane Semiconductor Lasers IX, San Francisco, California, USA. Proceedings of SPIE, 7616(76160R): 1-11. http://spiedigitallibrary.aip.org/journals/doc/SPIEDL-home/proc/en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:5096653
dc.description.abstractWe report a surface-emitting THz source based on intracavity difference-frequency generation in dual-wavelength midinfrared quantum cascade lasers with integrated giant second-order nonlinear susceptibility. The THz light is coupled out of the waveguide by a second-order grating etched into the laser ridges. In contrast to sources where the difference-frequency radiation is emitted from the facet, this approach enables extraction of the THz emission from the whole length of the device even when the coherence length is small. We also studied the properties of the mid-infrared pump beams and found that due to gain competition, mid-infrared modes tend to start lasing in higher order lateral modes. The mid-infrared mode with the lower threshold current reduces population inversion for the second laser with the higher threshold current due to stimulated emission. We developed a rate equation model to quantitatively describe mode interactions due to mutual gain depletion.en_US
dc.description.sponsorshipEngineering and Applied Sciencesen_US
dc.language.isoen_USen_US
dc.publisherSociety of Photo-optical Instrumentation Engineersen_US
dc.relation.isversionofdoi:10.1117/12.845066en_US
dc.relation.hasversionhttp://ca.deas.harvard.edu/capasso/publications/Geiser_Proc_SPIE_76160R-1_2010.pdfen_US
dash.licenseMETA_ONLY
dc.subjectquantum cascade laseren_US
dc.subjectmulti-wavelength laseren_US
dc.subjectTHzen_US
dc.subjectnonlinear opticsen_US
dc.subjectdifference frequency generationen_US
dc.subjectsurface emissionen_US
dc.subjectfrequency mixingen_US
dc.subjectmode competitionen_US
dc.subjectgain competitionen_US
dc.titleSurface-Emitting THz Sources Based on Difference-Frequency Generation in Mid-Infrared Quantum Cascade Lasersen_US
dc.typeConference Paperen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalProceedings of SPIEen_US
dash.depositing.authorCapasso, Federico
dash.embargo.until10000-01-01
dc.identifier.doi10.1117/12.845066*
dash.authorsorderedfalse
dash.contributor.affiliatedPfluegl, Christian J.
dash.contributor.affiliatedYu, Nanfang
dash.contributor.affiliatedCapasso, Federico


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