We　report　a　new　polymer/colloidal-quantum-dot　(CQD)　film　with　a　nanostructured　interface,　which　is　fabricated　through　a　template-assisted　photopolymerization　method,　toward　the　use　of　amplified　spontaneous　emission.　It　is　experimentally　demonstrated　that　the　amplified　spontaneous　emission　of　CQDs　is　able　to　be　manipulated　by　changing　the　nanostructured　polymeric　interface　with　a　weak　scattering　ability.　The　dependences　of　emission　wavelength　and　threshold　on　the　size　of　the　nanostructure　and　CQD　layer　thickness　are　investigated.　(C)　2020　Optical　Society　of　America