Electroluminescence at lambdasimilar to69 mum (4.3 THz) is reported from interminiband transitions in quantum-cascade structures with superlattice active regions. Spontaneous emission gives a low-temperature linewidth of 2 meV (0.48 THz) with linear light-current characteristics observed up to high-current densities (625 A/cm(2)), resulting in record output powers of 500 pW. Devices operate up to above liquid-nitrogen temperature, with both emission wavelength and current-voltage characteristics in good agreement with theoretical predictions. (C) 2002 American Institute of Physics.
High-intensity interminiband terahertz emission from chirped superlattices
TREDICUCCI, ALESSANDROSecondo
;
2002-01-01
Abstract
Electroluminescence at lambdasimilar to69 mum (4.3 THz) is reported from interminiband transitions in quantum-cascade structures with superlattice active regions. Spontaneous emission gives a low-temperature linewidth of 2 meV (0.48 THz) with linear light-current characteristics observed up to high-current densities (625 A/cm(2)), resulting in record output powers of 500 pW. Devices operate up to above liquid-nitrogen temperature, with both emission wavelength and current-voltage characteristics in good agreement with theoretical predictions. (C) 2002 American Institute of Physics.File in questo prodotto:
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