Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4826113
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Funding
- Japan Society for Promotion of Science [23000008]
- Japan Science and Technology Agency (CREST Project)), Japan
- Russian Foundation of Basic Research
- Dynasty Foundation, Russia
- Grants-in-Aid for Scientific Research [23000008] Funding Source: KAKEN
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We propose and substantiate the concept of terahertz (THz) laser enabled by the resonant electron radiative transitions between graphene layers (GLs) in double-GL structures. We estimate the THz gain for TM-mode exhibiting very low Drude absorption in GLs and show that the gain can exceed the losses in metal-metal waveguides at the low end of the THz range. The spectrum of the emitted photons can be tuned by the applied voltage. A weak temperature dependence of the THz gain promotes an effective operation at room temperature. (C) 2013 AIP Publishing LLC.
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