Low threshold edge emitting polymer distributed feedback laser based on a square lattice

Vasdekis, A. E.; Turnbull, G. A.; Samuel, I. D. W.; Andrew, P.; Barnes, W. L.
April 2005
Applied Physics Letters;4/18/2005, Vol. 86 Issue 16, p161102
Academic Journal
We report the demonstration of a low-threshold, edge-emitting polymer distributed feedback laser based on a square lattice. The lattice constant was 268 nm, which corresponds to a lattice line spacing in the ΓM symmetry direction of the Brillouin zone of 189 nm. The latter was employed to provide feedback at 630 nm via a first order diffraction process. The device operated on two longitudinal modes, which were situated on the band-edge near the M symmetry point. The two modes had thresholds of 0.66 nJ and 1.2 nJ—significantly lower than comparable surface-emitting DFB lasers. Angle dependent photoluminescence experiments were performed to investigate the effect of the square lattice on the laser operation and the origin of the low threshold.


Related Articles

  • Simultaneous two-level lasing in GaInAsSb/GaSb strained quantum-well lasers. Vizbaras, Kristijonas; Kashani-Shirazi, Kaveh; Amann, Markus-Christian // Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p071107 

    Simultaneous two-level lasing, corresponding to ground level and excited level transitions in GaInAsSb/GaSb quantum well lasers under continuous wave operation is reported. The effect is attributed to a slowed-down intersubband relaxation in the quantum wells due to buildup of hot phonon...

  • Isotopic Effect in Brillouin Light-Scattering Spectra of a Cs[sub 5]H[sub 3](SO[sub 4])[sub 4] � xH[sub 2]O Crystal. Lushnikov, S. G.; Fedoseev, A. I.; Shuvalov, L. A. // Physics of the Solid State;Dec2000, Vol. 42 Issue 12, p2265 

    A Brillouin scattering study of the behavior of hypersonic longitudinal acoustic phonons in crystalline pentacesium trihydrogen tetrasulfate Cs[sub 5]H[sub 3](SO[sub 4])[sub 4] � xH[sub 2]O (PCHS) and its deuterated analog Cs[sub 5]D[sub 3](SO[sub 4])[sub 4] � xD[sub 2]O (DPCHS) at...

  • A complete set of elastic constants of crystalline anthracene by Brillouin scattering. Dye, R.C.; Eckhardt, C.J. // Journal of Chemical Physics;2/15/1989, Vol. 90 Issue 4, p2090 

    Investigates the elastic constants of anthracene single crystal from acoustic phonon velocities obtained by Brillouin scattering method. Relationships between phonon velocities and lattice dynamics; Conversion of phonon velocities of low symmetry systems into elasticity coefficients.

  • Acoustic properties of the disordered relaxor ferroelectric PbSc1/2Ta1/2O3. Fedoseev, A.; Lushnikov, S.; Gvasaliya, S.; Kojima, S. // Physics of the Solid State;Jun2006, Vol. 48 Issue 6, p1102 

    The behavior of acoustic phonons in crystals of a relaxor ferroelectric, namely, the lead scandium tantalate PbSc1/2Ta1/2O3 (PST), is studied in the vicinity of the diffuse phase transition. The behavior of longitudinal and transverse acoustic phonons in a PST single crystal is examined using...

  • Phase transition in tetragonal hen egg-white lysozyme crystals. Svanidze, A. V.; Huth, H.; Lushnikov, S. G.; Kojima, Seiji; Schick, C. // Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p263702 

    Lattice dynamics of tetragonal hen egg-white lysozyme crystals was studied by Brillouin light scattering and differential ac-nanocalorimetry with controlled relative humidity from 298 to 330 K. Temperature dependences of fast quasitransverse phonon velocity and integral intensity were found to...

  • Ab Initio and Phenomenological Modeling of the Phonon Spectrum of Superhard cp-BCN. Basalaev, Yu.; Kopytov, A.; Pavlova, T.; Poplavnoi, A. // Russian Physics Journal;Nov2015, Vol. 58 Issue 7, p978 

    The phonon spectrum of hypothetical superhard cp-BC2N is calculated based on ab initio method of density functional in the center of the Brillouin zone and interpolated over the entire Brillouin zone using the Keating phenomenological model. The interaction parameters are determined by...

  • Acoustic whispering gallery modes within the theory of elasticity. Sturman, Boris; Breunig, Ingo // Journal of Applied Physics;2015, Vol. 118 Issue 1, p1 

    Investigations of nonlinear phenomena in optical whispering gallery mode (WGM) microresonators are booming because of rich physics and applications. Stimulated Brillouin scattering is one of the strongest processes in these devices. Here, the optical WGMs interact with acoustic counterparts. The...

  • Chemically etched ultrahigh-Q wedge-resonator on a silicon chip. Lee, Hansuek; Chen, Tong; Li, Jiang; Yang, Ki Youl; Jeon, Seokmin; Painter, Oskar; Vahala, Kerry J. // Nature Photonics;Jun2012, Vol. 6 Issue 6, p369 

    Ultrahigh-Q optical resonators are being studied across a wide range of fields, including quantum information, nonlinear optics, cavity optomechanics and telecommunications. Here, we demonstrate a new resonator with a record Q-factor of 875 million for on-chip devices. The fabrication of our...

  • Tightly trapped acoustic phonons in photonic crystal fibres as highly nonlinear artificial Raman oscillators. Kang, M. S.; Nazarkin, A.; Brenn, A.; Russell, P. St. J. // Nature Physics;Apr2009, Vol. 5 Issue 4, p276 

    Interactions between light and hypersonic waves can be enhanced by tight field confinement, as shown in periodically structured materials, microcavities, micromechanical resonators and photonic crystal fibres (PCFs). There are many examples of weak sound–light interactions, for example,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics