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Frontiers of Optoelectronics

Front. Optoelectron.    2020, Vol. 13 Issue (1) : 18-34
Distributed feedback organic lasing in photonic crystals
Yulan FU, Tianrui ZHAI()
Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
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Considerable research efforts have been devoted to the investigation of distributed feedback (DFB) organic lasing in photonic crystals in recent decades. It is still a big challenge to realize DFB lasing in complex photonic crystals. This review discusses the recent progress on the DFB organic laser based on one-, two-, and three-dimensional photonic crystals. The photophysics of gain materials and the fabrication of laser cavities are also introduced. At last, future development trends of the lasers are prospected.

Keywords photonic crystals      microcavity lasers      distributed feedback (DFB)     
Corresponding Author(s): Tianrui ZHAI   
Just Accepted Date: 11 September 2019   Online First Date: 07 November 2019    Issue Date: 03 April 2020
 Cite this article:   
Yulan FU,Tianrui ZHAI. Distributed feedback organic lasing in photonic crystals[J]. Front. Optoelectron., 2020, 13(1): 18-34.
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Yulan FU
Tianrui ZHAI
Fig.1  Absorption and PL spectra of (a) PFO, (b) F8BT, and (c) MDMO-PPV. The upper panel presents the corresponding molecular structure. Reproduced with permission [80]. Copyright 2015, RSC Publishing
Fig.2  Absorption and PL spectra of (a) coumarin 440, (b) coumarin 153, and (c) rhodamine 6G. Reproduced with permission [90]. Copyright 2014, OSA Publishing
Fig.3  Absorption and PL spectra of (a) blue QDs, (b) green QDs, and (c) red QDs
Fig.4  Schematics of various cavity types. (a) FP cavity; (b) WGM cavity; (c) DBR cavity; (d) DFB cavity
Fig.5  Photonic crystals for DFB cavities. (a) 1D gratings; (b) 2D periodic structure; (c) 3D periodic structure; (d) Fibonacci quasi-crystals; (e) 2D quasi-crystals; (f) 3D quasi-crystals; (g) Chirped gratings; (h) 2D gradual periodic structure; (i) 3D random structure
Fig.6  (a) Schematic of the feedback and the outcoupling of the waveguide mode; (b) diffraction theory of DFB lasers. Reproduced with permission [123]. Copyright 2019, MDPI
Fig.7  (a) Schematic of DFB lasers; (b) reduced multi-layered model. L is the grating period; d is the thickness of air; t is the grating depth; h is the gain waveguide thickness. The red curve indicates the mode profile
Fig.8  Schematic of DFB lasers with different configurations. (a) Gain/cavity/substrate; (b) cavity/gain/substrate; (c) active cavity/substrate
Fig.9  (a) Illustration of the experimental setup and formation mechanism of the pattern of a 3rd order DFB polymer laser; the purple spots shown in the right photograph are the reflection and diffraction of the pumping laser; (b) 2nd order laser pattern; (c) 3rd order laser pattern; (d) 4th order laser pattern. Reproduced with permission [123]. Copyright 2019, MDPI
Fig.10  (a) Schematic of organic vortex laser arrays based on spiral gratings. SEM images of the center of the (b) one-arm spiral, (c) two-arm spiral, and (d) three-arm spiral gratings. Beam profiles recorded for the beams generated using (e) circular, (f) one-arm, (g) two-arm, and (h) three-arm spiral gratings. Reproduced with permission [122]. Copyright 2018, ACS Publishing
Fig.11  (a) 7-beam configuration for the icosahedral quasicrystal. The upper inset denotes an icosahedral quasicrystal lattice; (b) actual 7-beam arrangement using a truncated pentagonal pyramid; (c) icosahedral quasicrystal lasing pattern projected on the back side of the glass substrate (see lower inset). DCG is the abbreviation of the dichromate gelatin emulsions; (d) higher resolution projection of the icosahedral quasicrystal lasing for inner region. The lines are guides to the eyes. Reproduced with permission [183]. Copyright 2009, OSA Publishing
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