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Document type:
Zeitschriftenaufsatz 
Author(s):
Tzenov, P.; Babushkin, I.; Arkhipov, R.; Arkhipov, M.; Rosanov, N.N.; Morgner, U.; Jirauschek, C. 
Title:
Passive and hybrid mode locking in multi-section terahertz quantum cascade lasers 
Abstract:
It is believed that passive mode locking is virtually impossible in quantum cascade lasers (QCLs) because of too fast carrier relaxation time. Here, we revisit this possibility and theoretically show that stable mode locking and pulse durations in the few cycle regime at terahertz (THz) frequencies are possible in suitably engineered bound-to-continuum QCLs. We achieve this by utilizing a multi-section cavity geometry with alternating gain and absorber sections. The critical ingredients are the...    »
 
Journal title:
New Journal of Physics 2018-04 
Year:
2018 
Year / month:
2018-04 
Quarter:
2. Quartal 
Month:
Apr 
Language:
en 
Publisher:
IOP Publishing