公开(公告)号：GB2504003B

公开(公告)日：2015-08-12

申请号：GB201312434

申请日：2013-07-11

Applicant: ALPHAMICRON INC

Inventor： MUNOZ ANTONIO ,  KOSA TAMAS ,  LUCHETTE PAUL ,  SUKHOMLINOVA LUDMILLA ,  BAHMAN TAHERI

IPC: H01S5/10 ,  G02B6/122 ,  G02F1/1334 ,  H01S3/16

Abstract: A light emitting photonic bandgap (PBG) material, and devices uses the same, having (a) a polymer network exhibiting a non-uniform pitch; (b) a small molecule liquid crystal material with a birefringence>0.04; and (c) one or more light emitting dyes having a low triplet state absorption. The light emitting PBG material has a defect-induced density of states enhancing feature at a wavelength that overlaps the emission spectrum of the light emitting dye. Excitation of the light emitting PBG material by a light source causes a directional electromagnetic emission from the light emitting material. The PBG material, and device, are capable of emitting continuous wave laser light as a result of excitation by a low-power incoherent light source.

公开(公告)号：GB2504003A

公开(公告)日：2014-01-15

申请号：GB201312434

申请日：2013-07-11

Applicant: ALPHAMICRON INC

Inventor： MUNOZ ANTONIO ,  KOSA TAMAS ,  LUCHETTE PAUL ,  SUKHOMLINOVA LUDMILLA ,  BAHMAN TAHERI

IPC: H01S5/10 ,  G02B6/122 ,  G02F1/1334 ,  H01S3/16

Abstract: A light emitting photonic band gap (PBG) material 10 comprises a polymer network 12 exhibiting a non-uniform pitch, a small molecule liquid crystal material 18 for example, nematic, smectic or cholesteric, with bifringence > 0.04, one or more light emitting dyes 20 having a low triplet state absorption, and wherein the light emitting PBG material has a defect-induced density of states enchancing feature at a wavelength that overlaps the emission spectrum of the light emitting dye. A cholesteric (CLC) laser may also be produced using the PBG material, pulsed and continuous wave (CW) directional emission may produced in the dye doped CLCs under both coherent (laser) and incoherent (eg LED) continuous (CW) light excitation. The combination of the dye and a polymer stabilized disturbed feedback structure of the CLC exhibiting defect-type photonic band gap (PBG) behaviour may be used to achieve the effect. The polymer network may have a chirality of its own or follow the chirality of an added liquid crystal material.