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dc.contributor.authorSun, Haoen_US
dc.contributor.authorQi, Zhipengen_US
dc.contributor.authorKim, Youngminen_US
dc.contributor.authorLuo, Manlinen_US
dc.contributor.authorYang, Boen_US
dc.contributor.authorNam, Donguken_US
dc.identifier.citationSun, H., Qi, Z., Kim, Y., Luo, M., Yang, B. & Nam, D. (2021). Frequency-tunable terahertz graphene laser enabled by pseudomagnetic fields in strain-engineered graphene. Optics Express, 29(2), 1892-1902.
dc.description.abstractGraphene-based optoelectronic devices have recently attracted much attention for the next-generation electronic-photonic integrated circuits. However, it remains elusive whether it is feasible to create graphene- based lasers at the chip scale, hindering the realization of such a disruptive technology. In this work, we theoret- ically propose that Landau-quantized graphene enabled by strain-induced pseudomagnetic field can become an excellent gain medium that supports lasing action without requiring an external magnetic field. Tight-binding theory is employed for calculating electronic states in highly strained graphene while analytical and numerical analyses based on many-particle Hamiltonian allow studying detailed microscopic mechanisms of zero-field graphene Landau level laser dynamics. Our proposed laser presents unique features including a convenient, wide-range tuning of output laser frequency enabled by changing the level of strain in graphene gain media. The chip-scale graphene laser may open new possibilities for graphene-based electronic-photonic integrated circuits.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relationNRF2018-NRF-ANR009 TIGERen_US
dc.relationMOE2018-T2-2-011 (S)en_US
dc.relationRG 179/17en_US
dc.relationRG 148/19en_US
dc.relation.ispartofOptics Expressen_US
dc.rights© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.en_US
dc.subjectEngineering::Electrical and electronic engineering::Optics, optoelectronics, photonicsen_US
dc.titleFrequency-tunable terahertz graphene laser enabled by pseudomagnetic fields in strain-engineered grapheneen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.researchCentre for OptoElectronics and Biophotonics (OPTIMUS)en_US
dc.description.versionPublished versionen_US
dc.description.acknowledgementThis work was supported in part by the Singapore Ministry of Education Academic Research Fund Tier 1 (RG 179/17 and RG 148/19) and Tier 2 (MOE2018-T2-2-011 (S)). This work also received partial funding support from National Re- search Foundation of Singapore through the Competitive Re- search Program (NRF2017NRF-CRP001-003) and the NRF- ANR Joint Grant (NRF2018-NRF-ANR009 TIGER).en_US
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