A Large Blue Shift of the Biexciton State in Tellurium Doped CdSe Colloidal Quantum Dots [PDF]
Nanoletters Vol. 8 (2008) No.8, 2008 The exciton-exciton interaction energy of Tellurium doped CdSe colloidal quantum dots is experimentally investigated. The dots exhibit a strong Coulomb repulsion between the two excitons, which results in a huge measured biexciton blue shift of up to 300 meV.
Assaf Avidan, Dan Oron
arxiv +6 more sources
Gigantic blue shift of two-photon–induced photoluminescence of interpenetrated metal–organic framework (MOF) [PDF]
Nanophotonics, 2023 As an important means of modern science and technology, multiphoton fluorescence plays an essential role in high-resolution imaging, photochemistry, micro- and nano-processing and clinical diagnosis.
Chen Zhihui +8 more
doaj +3 more sources
Coexistence of the Band Filling Effect and Trap-State Filling in the Size-Dependent Photoluminescence Blue Shift of MAPbBr3 Nanoparticles [PDF]
NanomaterialsThe size-dependent photoluminescence (PL) blue shift in organometal halide perovskite nanoparticles has traditionally been attributed to quantum confinement effects (QCEs), irrespective of nanoparticle size.
Jing Sun +4 more
doaj +3 more sources
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. [PDF]
PLoS ONE, 2014 The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual
Brian S Miller +3 more
doaj +6 more sources
Quantum Dot-Induced Blue Shift of Surface Plasmon Spectroscopy [PDF]
Nanomaterials, 2022 We experimentally demonstrate the spectral blue shift of surface plasmon resonance through the resonant coupling between quantum dots (QDs) and surface plasmons, surprisingly in contrast to the conventionally observed red shift of plasmon spectroscopy ...
Than Thi Nguyen +4 more
doaj +2 more sources
Lattice-induced non-adiabatic frequency shifts in optical lattice clocks [PDF]
Phys. Rev. A 82, 031402(R) (2010), 2010 We consider the frequency shift in optical lattice clocks which arises from the coupling of the electronic motion to the atomic motion within the lattice. For the simplest of 3-D lattice geometries this coupling is shown to only affect clocks based on blue-detuned lattices.
C. E. Moore, K. Beloy
arxiv +3 more sources
Electro-absorption of silicene and bilayer graphene quantum dots [PDF]
J. Appl. Phys. 120, 014304 (2016), 2016 We study numerically the optical properties of low-buckled silicene and AB-stacked bilayer graphene quantum dots subjected to an external electric field, which is normal to their surface. Within the tight-binding model, the optical absorption is calculated for quantum dots, of triangular and hexagonal shapes, with zigzag and armchair edge terminations.
Abdelsalam, H. +4 more
arxiv +5 more sources
Blue shift of spontaneous emission in hyperbolic metamaterial [PDF]
Scientific Reports, 2013 Spontaneous emission is one of the most fundamental quantum phenomena in optics. Following the seminal work of Purcell and in agreement with the Fermi's Golden Rule, its rate can be controlled with the photonic density of states (PDOS). In recent years, this effect has been demonstrated in metamaterials with hyperbolic dispersion--highly anisotropic ...
Lei Gu +3 more
openaire +5 more sources
Aging of porous silicon and the origin of blue shift
Optics Express, 2003 Aging effects of porous silicon (PS) and the origin of blue shift are investigated. Photoluminescence (PL) measurements of the PS prepared with HF-EtOH solution showed a 210 meV blue shift after 1.5 months. It is found from deconvolution of the PL spectra that this shift is not fully related to the quantum confinement (QC) effect.
Tevhit Karacalı +2 more
openalex +5 more sources
Discovery of strongly blue shifted mid-infrared [NeIII] and [NeV] emission in ULIRGs [PDF]
, 2009 We report the discovery of blue shifted (delta(V) > 200 km/s) mid-infrared [NeIII] and/or [NeV] emission in 25 out of 82 ULIRGs (30% of our sample). The incidence of blue shifted [NeV] emission is even higher (59%) among the sources with a [NeV] detection -- the tell-tale signature of an active galactic nucleus (AGN).
Allen +33 more
arxiv +3 more sources