APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Next Issue

4 Jan 2010

Volume 96, Issue 1, Articles (01xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 96, 013107 (2010); http://dx.doi.org/10.1063/1.3280900 (3 pages)

L. Fernández, M. Corso, F. Schiller, M. Ilyn, M. Holder, and J. E. Ortega
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Dual band terahertz waveguiding on a planar metal surface patterned with annular holes

C. R. Williams, M. Misra, S. R. Andrews, S. A. Maier, S. Carretero-Palacios, S. G. Rodrigo, F. J. Garcia-Vidal, and L. Martin-Moreno

Appl. Phys. Lett. 96, 011101 (2010); http://dx.doi.org/10.1063/1.3276545 (3 pages) | Cited 7 times

Online Publication Date: 4 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report studies of the guiding of terahertz radiation on a copper surface textured with an array of blind annular holes. The structure supports two tightly bound surface plasmon-polaritonlike electromagnetic waves associated with TE11 and TEM coaxial waveguide modes. The TE11-like surface mode has a cutoff determined by the array period while the TEM mode can be arranged to have a lower frequency cut-off by adjusting the hole depth. The ability to guide two modes in independently variable bands could be useful in quantitative chemical sensing.
Show PACS
68.35.B- Structure of clean surfaces (and surface reconstruction)
73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
68.37.Lp Transmission electron microscopy (TEM)
71.36.+c Polaritons (including photon-phonon and photon-magnon interactions)
78.70.Gq Microwave and radio-frequency interactions
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

Low voltage and high transmittance blue-phase liquid crystal displays with corrugated electrodes

Meizi Jiao, Yan Li, and Shin-Tson Wu

Appl. Phys. Lett. 96, 011102 (2010); http://dx.doi.org/10.1063/1.3290253 (3 pages) | Cited 35 times

Online Publication Date: 4 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A low voltage (<10 V) and high transmittance ( ∼ 85.6%) polymer-stabilized blue-phase liquid crystal (BPLC) display is proposed. The periodic corrugated electrodes generate a strong horizontal field component to induce isotropic-to-anisotropic transition in the BPLC medium through Kerr effect. Moreover, this field is uniformly distributed across the entire LC layer so that the accumulated phase retardation along the beam path is large, resulting in low voltage and high transmittance. This approach enables BPLC to be addressed by amorphous-silicon thin film transistors, which would accelerate its emergence as next-wave display technology.
Show PACS
85.60.Pg Display systems
85.30.Tv Field effect devices

Monte Carlo study of carrier-light coupling in terahertz quantum cascade lasers

Christian Jirauschek

Appl. Phys. Lett. 96, 011103 (2010); http://dx.doi.org/10.1063/1.3284523 (3 pages) | Cited 14 times

Online Publication Date: 4 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a method for self-consistently including the optical cavity field into Monte Carlo-based carrier transport simulations. This approach allows for an analysis of the actual lasing operation in quantum cascade lasers, considering effects such as gain, saturation, and longitudinal mode competition. Simulation results for a terahertz quantum cascade laser are found to be consistent with experiment.
Show PACS
42.55.Px Semiconductor lasers; laser diodes
02.70.Uu Applications of Monte Carlo methods
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
42.60.By Design of specific laser systems

Hybrid mode-locking in a 40 GHz monolithic quantum dot laser

G. Fiol, D. Arsenijević, D. Bimberg, A. G. Vladimirov, M. Wolfrum, E. A. Viktorov, and Paul Mandel

Appl. Phys. Lett. 96, 011104 (2010); http://dx.doi.org/10.1063/1.3279136 (3 pages) | Cited 10 times

Online Publication Date: 5 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Hybrid mode-locking in monolithic quantum dot (QD) lasers is studied experimentally and theoretically. A strong asymmetry of the locking range with respect to the passive mode locking frequency is observed. The width of this range increases linearly with the modulation amplitude for all operating parameters. Maximum locking range found is 30 MHz. The results of a numerical analysis performed using a set of delay-differential equations taking into account carrier exchange between QDs and wetting layer are in agreement with experiments and indicate that a spectral filtering element could improve locking characteristics.
Show PACS
42.60.Fc Modulation, tuning, and mode locking
42.55.Px Semiconductor lasers; laser diodes
42.79.Ci Filters, zone plates, and polarizers
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation

Epitaxial growth of one-dimensional GaN nanostructures with enhanced near-band edge emission by chemical vapor deposition

Taeseup Song, Won Il Park, and Ungyu Paik

Appl. Phys. Lett. 96, 011105 (2010); http://dx.doi.org/10.1063/1.3279147 (3 pages) | Cited 1 time

Online Publication Date: 5 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report a simple chemical vapor deposition method for epitaxial growth of hierarchical GaN one-dimensional nanostructures (1DNSs) that have good optical characteristics. By changing the evaporation temperature of the Ga source, we were able to change the morphologies of GaN 1DNSs from hexagonal-faceted, pencil-like structures to rough-surfaced, polygonal towerlike structures. Furthermore, we investigated the correlation between the morphology and the luminescence characteristics of the GaN 1DNSs. Spatially and spectrally resolved cathodoluminescence (CL) measurements revealed that the relative near-band edge emission intensities of the GaN 1DNSs were 8–20 times higher than that of GaN thin film. In addition, pencil-like GaN 1DNSs exhibited 2.5-fold greater CL intensity than polygonal towerlike 1DNSs. These results indicate that controlling the surface morphology of GaN 1DNSs allows improvement in the optical properties of GaN nanostructures.
Show PACS
81.16.-c Methods of micro- and nanofabrication and processing
68.35.bg Semiconductors
81.15.Gh Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.)
61.46.-w Structure of nanoscale materials
78.67.Bf Nanocrystals, nanoparticles, and nanoclusters
78.60.Hk Cathodoluminescence, ionoluminescence
81.07.Bc Nanocrystalline materials

Electric field induced biaxiality and the electro-optic effect in a bent-core nematic liquid crystal

Mamatha Nagaraj, Y. P. Panarin, U. Manna, J. K. Vij, C. Keith, and C. Tschierske

Appl. Phys. Lett. 96, 011106 (2010); http://dx.doi.org/10.1063/1.3280817 (3 pages) | Cited 11 times

Online Publication Date: 7 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report the observation of a biaxial nematic phase in a bent-core molecular system using polarizing microscopy, electro-optics, and dielectric spectroscopy, where we find that the biaxiality exists on a microscopic scale. An application of electric field induces a macroscopic biaxiality and in consequence gives rise to electro-optic switching. This electro-optic effect shows significant potential in applications for displays due to its fast high-contrast response. The observed electro-optic switching is explained in terms of the interaction of the ferroelectric clusters with the electric field.
Show PACS
61.30.Gd Orientational order of liquid crystals; electric and magnetic field effects on order
78.20.Jq Electro-optical effects

Electrically driven quantum dot-micropillar single photon source with 34% overall efficiency

T. Heindel, C. Schneider, M. Lermer, S. H. Kwon, T. Braun, S. Reitzenstein, S. Höfling, M. Kamp, and A. Forchel

Appl. Phys. Lett. 96, 011107 (2010); http://dx.doi.org/10.1063/1.3284514 (3 pages) | Cited 31 times

Online Publication Date: 7 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report on triggered single photon emission from low mode volume electrically driven quantum dot-micropillar cavities at repetition rates of up to 220 MHz. Due to an optimized layout of the doped planar microcavity and an advanced lateral current injection scheme, highly efficient single photon sources are realized. While g(2)(0)-values as low as 0.13±0.05 and a Purcell factor of 4 are observed for a 2.0 μm diameter micropillar, single photon emission at a rate of (35±7) MHz and an overall efficiency of (34±7)% are demonstrated for a 3.0 μm device.
Show PACS
78.60.Fi Electroluminescence
73.63.Kv Quantum dots
78.67.Hc Quantum dots
72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping

Optical resonances created by photonic transitions

Zongfu Yu and Shanhui Fan

Appl. Phys. Lett. 96, 011108 (2010); http://dx.doi.org/10.1063/1.3279130 (3 pages)

Online Publication Date: 7 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We show that a high-Q optical resonance can be created dynamically, by inducing a photonic transition between a localized state and a one-dimensional continuum through refractive index modulation. In this mechanism, both the frequency and the external linewidth of a single resonance are specified by the dynamics, allowing complete control of the resonance properties. An example using photonic crystal heterostructure cavity is demonstrated with numerical simulation. We also show that the reported effect can be accomplished with realistic index modulation strength and frequencies.
Show PACS
42.79.Hp Optical processors, correlators, and modulators
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
42.70.Qs Photonic bandgap materials

Ultrafast gated imaging of laser produced plasmas using the optical Kerr effect

D. R. Symes, U. Wegner, H.-C. Ahlswede, M. J. V. Streeter, P. L. Gallegos, E. J. Divall, R. A. Smith, P. P. Rajeev, and D. Neely

Appl. Phys. Lett. 96, 011109 (2010); http://dx.doi.org/10.1063/1.3279139 (3 pages) | Cited 8 times

Online Publication Date: 7 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Optical imaging is a versatile diagnostic for investigations of plasmas generated under intense laser irradiation. Electro-optic gating techniques operating on the >100 ps timescale are commonly used to reduce the amount of light detected from self-emission of hot plasma or improve the temporal resolution of the detector. The use of an optical Kerr gate enables a superior dynamic range and temporal resolution compared to electronically gated devices. The application of this method for enhanced imaging of laser produced plasmas with gate time ∼ 100 fs is demonstrated, and the possibility to produce a sub-10 fs, high dynamic range “all optical” streak camera is discussed.
Show PACS
52.70.Kz Optical (ultraviolet, visible, infrared) measurements
06.60.Jn High-speed techniques (microsecond to femtosecond)
42.65.Jx Beam trapping, self-focusing and defocusing; self-phase modulation
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close