Spectral narrowing and lasing threshold in self-assembled active photonic crystal

Kedia, Sunita; Vijaya, R.; Ray, Alok K.; Sinha, Sucharita

doi:10.1016/j.optcom.2010.12.056

Cited by 11 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Larger density of states available at the photonic band edge supported Bloch lasing in PhC. The lasing cavity was further improved by gold coating the top surface of the PhC [29].…”

Section: Resultsmentioning

confidence: 99%

Random lasing from dyed polystyrene spheres in disordered environments

Kedia

Sinha

2018

Journal of Laser Applications

Self Cite

View full text Add to dashboard Cite

Advance designs of random lasers towards development of miniature laser systems are in demand. We demonstrated random lasing from Rhodamine-B dye attached to polystyrene micro-spheres. Bare polystyrene spheres were used as scatterers and these provided optical feedback to the gain. Random lasing was successfully demonstrated in two different disordered environments, in binary colloidal mixture solution and in photonic glass. Incoherent feedback occurred in both the cases and single wavelength lasing were obtained. The lasing threshold in case of photonic glass was lower in comparison to binary colloidal mixture solution. This was because of higher index contrast and larger filling fraction of micro-particles in case of photonic glass. Longer fluorescence lifetime of embedded dye was observed in photonic glass environment in comparison to ethanolic solution of the Rhodamine-B dye. Lasing results obtained for photonic glass were compared with our previous results of Bloch lasing in photonic crystal synthesized using similar dye doped polystyrene micro-spheres.

show abstract

“…Larger density of states available at the photonic band edge supported Bloch lasing in PhC. The lasing cavity was further improved by gold coating the top surface of the PhC [29].…”

Section: Resultsmentioning

confidence: 99%

Random lasing from dyed polystyrene spheres in disordered environments

Kedia

Sinha

2018

Journal of Laser Applications

Self Cite

View full text Add to dashboard Cite

show abstract

“…PCs covered with a thin film of metal has been shown to support localized surface plasmon resonance (LSPR) whose peak position could be tuned, by varying the colloidal diameter, or the metal film thickness, or both [ 20 ]. Directional emission is reported from a monolayer containing a gain medium grown on a thin gold film [ 13 , 15 , 114 , 115 ]. The synthesis of metal nanoparticles can be achieved by using different methods, from electrodeposition [ 116 ], to chemical wet reduction [ 117 ], with single or double phase [ 118 , 119 , 120 ], and suitably selecting the amount and type of ligands, in particular, thiols [ 121 ] or amines [ 122 ].…”

Section: Aunps With Opalsmentioning

confidence: 99%

Gold Nanoparticles in Photonic Crystals Applications: A Review

Venditti

2017

Materials

View full text Add to dashboard Cite

This review concerns the recently emerged class of composite colloidal photonic crystals (PCs), in which gold nanoparticles (AuNPs) are included in the photonic structure. The use of composites allows achieving a strong modification of the optical properties of photonic crystals by involving the light scattering with electronic excitations of the gold component (surface plasmon resonance, SPR) realizing a combination of absorption bands with the diffraction resonances occurring in the body of the photonic crystals. Considering different preparations of composite plasmonic-photonic crystals, based on 3D-PCs in presence of AuNPs, different resonance phenomena determine the optical response of hybrid crystals leading to a broadly tunable functionality of these crystals. Several chemical methods for fabrication of opals and inverse opals are presented together with preparations of composites plasmonic-photonic crystals: the influence of SPR on the optical properties of PCs is also discussed. Main applications of this new class of composite materials are illustrated with the aim to offer the reader an overview of the recent advances in this field.

show abstract

“…High-density photonic integration is an enabling technology for optical communication components that essentially depends on novel optical materials properties both actives and passives photonic crystals [1,2]. Photonic crystals (PCs), which are often fabricated periodic dielectric materials, have attracted a great deal of attention because of the existence of photonic bandgap (PBG) in which certain electromagnetic waves are forbidden to propagate in a particular frequency range [3,4].…”

Section: Introductionmentioning

confidence: 99%