| Autor: |
Schrottke, L., Lü, X., Röben, B., Biermann, K., Wienold, M., Richter, H., Hübers, H.-W., Grahn, H. T. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2018, Vol. 123 Issue 21, pN.PAG-N.PAG, 8p, 6 Graphs |
| Abstrakt: |
We have studied the intrinsic frequency tuning of several terahertz (THz) quantum-cascade lasers (QCLs) based on a hybrid design. With increasing driving current, most QCLs exhibit either a redshift or a blueshift, while some QCLs show both. An oscillator model describes the observed behavior. The accuracy of the model is affected by the complexity of the current-dependent gain spectra of the THz QCLs. Numerical simulations demonstrate a cavity pulling effect insofar as the tuning behavior depends on the resonator losses and on the width of the gain spectra. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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