Abstract
In order to reduce the optical absorption loss, an array of double-heterostructure photonic crystal microcavity lasers was fabricated in which much of the photonic crystal mirror region was disordered by quantum well intermixing. In characterizing these devices, we obtained more than a factor of two increase in slope efficiencies and more than 20% reduction in threshold pump powers compared to devices that were not intermixed.
Highlights
IntroductionTwo-dimensional photonic crystal (PC) microcavity lasers [1, 2] would be a more promising source candidate for photonic integrated circuits (PIC) if they were capable of higher output powers and higher output slope efficiencies
In order to reduce the optical absorption loss, an array of double-heterostructure photonic crystal microcavity lasers was fabricated in which much of the photonic crystal mirror region was disordered by quantum well intermixing
Two-dimensional photonic crystal (PC) microcavity lasers [1, 2] would be a more promising source candidate for photonic integrated circuits (PIC) if they were capable of higher output powers and higher output slope efficiencies
Summary
Two-dimensional photonic crystal (PC) microcavity lasers [1, 2] would be a more promising source candidate for photonic integrated circuits (PIC) if they were capable of higher output powers and higher output slope efficiencies. Where Γ is the confinement factor and αtotal is the total optical loss which consists of loss of a passive resonator and absorption loss By reducing this absorption term (α absorption) in Eq (1) and (2), we can decrease the laser threshold and increase the slope efficiency at the same time. We have recently demonstrated optically-pumped pulsed output powers of one hundred micro-watts in edge-emitting double-heterostructure (DH) microcavities [3, 4]. These devices could be improved if the absorption due to the quantum wells in the mirror regions was eliminated. The intermixing was accomplished using the ion implantation approach [5, 6, 7]
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