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(Color online) Laser microscope images and schematic fabrication procedures of BP1T microring lasers. See the right inset for the backbone model of BP1T. Here C atoms are represented by small circles and a S atom is represented by a large circle. (a) Reversal patterning process by use of the electron beam lithography. (b) Fabrication of a Si etch mask layer by RIE processes. (c) Fabrication of Cytop and BP1T crystal layers by RIE. (d) Removal of a Si mask by RIE processes.
Lasing spectra of BP1T microrings: (a) A diameter and a ring width . (b) and . (c) and . (d) and .
Mode intervals as a function of the resonator length given by the circumferential length of the microring. The solid line is the least-squares fitting of the mode interval vs the inverse of the length of the resonator.
Excitation density dependence of the highest emission peak intensities of a microring laser (solid square) and a thin film crystal (solid circle). The diameter of a microring laser is and the ring width is . The thresholds for the laser oscillation of a microring and a thin film crystal are 200 and , respectively.
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