Theory and technology of SPASERs

M Premaratne, MI Stockman - Advances in Optics and Photonics, 2017 - opg.optica.org
Spaser is an acronym for surface plasmon amplification by stimulated emission of radiation.
A spaser is effectively a nanoscale laser with subwavelength dimensions and a low-Q …

Switchable lasers via solvent stimulus-responsive photonic crystals

BX Zhang, F Jin, XZ Dong, J Liu… - Journal of Materials …, 2022 - pubs.rsc.org
Organic lasers with switchable lasing wavelengths are critical to a variety of optical devices,
including laser displays, data storage and biological monitoring, owing to their tunability …

Fabrication and photonic applications of large-domain blue phase films

J Yang, J Liu, B Guan, W He, Z Yang, J Wang… - Journal of Materials …, 2019 - pubs.rsc.org
Here, a facile method is put forward to fabricate freestanding, large-domain blue phase (BP)
films based on self-assembly technology. This fabrication method enables the formation of …

Polystyrene photonic crystals as optical sensors for volatile organic compounds

L Burratti, F De Matteis, M Casalboni, R Francini… - Materials chemistry and …, 2018 - Elsevier
We have synthesized self-assembled photonic crystals (PCs) based on polystyrene
nanospheres having average diameters of 250 nm. Samples were obtained by drop-casting …

Low-threshold lasing in photonic-crystal heterostructures

MS Reddy, R Vijaya, ID Rukhlenko, M Premaratne - Optics Express, 2014 - opg.optica.org
We study a photonic crystal (PhC) heterostructure cavity consisting of gain medium in a
three-dimensional (3D) PhC sandwiched between two identical passive multilayers. For this …

Role of stopband and localized surface plasmon resonance in Raman scattering from metallo-dielectric photonic crystals

D Rout, R Vijaya - Plasmonics, 2017 - Springer
Self-assembled photonic crystals grown from different colloidal sizes are coated with gold
nanoparticles preferentially on their surface. The effect of localized surface plasmon …

Band edge–and defect mode–induced emission from a photonic crystal heterostructure cavity

G Kumar, R Vijaya - JOSA B, 2018 - opg.optica.org
We numerically modeled and experimentally investigated a photonic crystal (PhC)
heterostructure cavity with a three-dimensionally (3D) ordered colloidal PhC made from …

Photonic crystal based heterostructures in the control of emission and diffraction features

G Kumar, A Haldar, R Vijaya - ISSS Journal of Micro and Smart Systems, 2022 - Springer
Photonic crystals have very interesting features in their angle-resolved spectral response,
originating from the periodic arrangement of dielectric constant and the consequent …

Amplified emission and modified spectral features in an opal hetero-structure mediated by passive defect mode localization

D Rout, G Kumar, R Vijaya - Journal of Physics D: Applied …, 2017 - iopscience.iop.org
A photonic crystal hetero-structure consisting of a passive planar defect of SiO 2 thin film
sandwiched between two identical opals grown by inward growing self-assembly method …

Low-threshold lasing in active opal photonic crystals

MS Reddy, R Vijaya, ID Rukhlenko, M Premaratne - Optics Letters, 2013 - opg.optica.org
We theoretically study a low-threshold band-edge lasing in three-dimensional photonic
crystals (PhCs) with a face-centered cubic lattice structure, using a complex-valued …