Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities

摘要： Lasers with multi-wavelength colloidal quantum dots (CQDs) can be achieved using complex grating structures and ?exible substrate. The structure contains graduated periods and rectangular cavity fabricated through interference lithography, which acts as the distributed feedback cavity. A layer of densely packed CQD ?lm is deposited on the cavity via spin coating technique. The performance of CQD lasers based on di?erent distributed feedback cavities is investigated. Multi-wavelength lasing is achieved based on a ?exible rectangular cavity.