Room temperature phosphorescent organic materials for optical waveguides

2021 ◽  
Author(s):  
Mallesham Godumala ◽  
Avulu Vinod Kumar ◽  
Rajadurai Chandrasekar
Keyword(s):  
Refractive Index ◽  
Electromagnetic Fields ◽  
Optical Waveguides ◽  
Room Temperature ◽  
Organic Materials ◽  
High Refractive Index ◽  
Molecular Solids ◽  
Direction Parallel ◽  
One Dimensional

Organic optical waveguides (OWGs) are high refractive index one-dimensional molecular solids used to guide electromagnetic fields in a direction parallel to their long axis. OWGs attract a great deal of...

scholarly journals Single-mode optical waveguides on native high-refractive-index substrates

APL Photonics ◽  
2016 ◽  
Vol 1 (7) ◽  
pp. 071302 ◽  
Author(s):  
Richard R. Grote ◽  
Lee C. Bassett
Keyword(s):  
Refractive Index ◽  
Optical Waveguides ◽  
Single Mode ◽  
High Refractive Index

scholarly journals Extended bound states in the continuum in a one-dimensional grating implemented on a distributed Bragg reflector

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Emilia Pruszyńska-Karbownik ◽  
Mikołaj Janczak ◽  
Tomasz Czyszanowski
Keyword(s):  
Refractive Index ◽  
Bound States ◽  
High Refractive Index ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector ◽  
Optical Cavities ◽  
One Dimensional ◽  
Optical Modes ◽  
High Degree ◽  
The Continuum

Abstract Bound states in the continuum (BICs) are observed in optical cavities composed of a high refractive index periodic structure embedded in significantly lower refractive index surroundings, enabling vertical confinement of the grating modes. Here, we propose a vertically nonsymmetric configuration, implemented on a high refractive index bulk substrate with a one-dimensional grating positioned on a distributed Bragg reflector (DBR). In this configuration, the grating modes are leaky, which could prohibit the creation of a BIC if the grating was implemented on uniform substrate. However, the judiciously designed DBR on which the grating is implemented reflects nonzero diffraction orders induced by the grating. We found that the laterally antisymmetric optical modes located at the center of the Brillouin zone of this structure create BICs that are robust against changes in the grating parameters, as long as the DBR reflects the diffraction orders. The configuration enables a high degree of design freedom, facilitating the realization of very high quality factor cavities in conventional all-semiconductor technology.

One-dimensional assembly of β-form anhydrous guanine microrods

Soft Matter ◽  
2021 ◽  
Author(s):  
Yanan Liu ◽  
Fenghua Chen ◽  
Dongmei Guo ◽  
Yurong Ma
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
High Refractive Index ◽  
One Dimensional

Biogenic guanine crystals exhibit excellent optical properties contributing to its extremely high refractive index. However there is no report related to the highly-ordered guanine assemblies in the synthetic systems. Herein,...

scholarly journals Strong coupling of single quantum dots with low-refractive-index/high-refractive-index materials at room temperature

2020 ◽  
Vol 6 (47) ◽  
pp. eabb3095
Author(s):  
Xingsheng Xu ◽  
Siyue Jin
Keyword(s):  
Quantum Dots ◽  
Refractive Index ◽  
Strong Coupling ◽  
Room Temperature ◽  
High Refractive Index ◽  
Colloidal Quantum Dots ◽  
Rabi Splitting ◽  
Pl Spectra ◽  
Dielectric Cavity ◽  
Low Refractive Index

Strong coupling between a cavity and transition dipole moments in emitters leads to vacuum Rabi splitting. Researchers have not reported strong coupling between a single emitter and a dielectric cavity at room temperature until now. In this study, we investigated the photoluminescence (PL) spectra of colloidal quantum dots on the surface of a SiO2/Si material at various collection angles at room temperature. We measured the corresponding reflection spectra for the SiO2/Si material and compared them with the PL spectra. We observed PL spectral splitting and regarded it as strong coupling between colloidal quantum dots and the SiO2/Si material. Upper polaritons and lower polaritons exhibited anticrossing behavior. We observed Rabi splitting from single-photon emission in the dielectric cavity at room temperature. Through analysis, we attributed the Rabi splitting to strong coupling between quantum dots and bound states in the continuum in the low-refractive-index/high-refractive-index hybrid material.

Design, synthesis, and characterization of 6-[(trimethyl)silylethynyl]naphthalene-2-ethene: a new precursor for the preparation of high-refractive-index organic materials

2020 ◽  
Vol 75 (4) ◽  
pp. 359-363 ◽  
Author(s):  
Sacha Legrand ◽  
Milja Hannu-Kuure ◽  
Ari Kärkkäinen
Keyword(s):  
Refractive Index ◽  
Organic Materials ◽  
High Refractive Index ◽  
Raw Material ◽  
Synthesis And Characterization ◽  
Design Synthesis ◽  
Naphthalene Derivative ◽  
C Nmr

AbstractA new polymerizable naphthalene derivative has been designed, prepared, and characterized by 1H, 13C NMR, and MS. The new monomer synthesis has successfully been accomplished from a cheap commercially available raw material, in only four steps with good yields. The four steps can be easily scaled up for manufacturing purposes. It is anticipated that the new precursor can be very useful in the preparation of valuable materials with high refractive index for numerous opto-electronic applications.

scholarly journals Catalyst-Free Polymerization with 100% Atom Economy: Facile Synthesis of Polysulfonates with Multifunctionalities

2020 ◽  
Author(s):  
XIAOLIN LIU ◽  
Xin Liang ◽  
YUBING HU ◽  
Qing Qu ◽  
Dongming Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Antibacterial Activity ◽  
Room Temperature ◽  
High Refractive Index ◽  
Atom Economy ◽  
Facile Synthesis ◽  
Spontaneous Polymerization ◽  
Catalyst Free ◽  
High Yields ◽  
Post Functionalization

Catalyst-free spontaneous polymerization for the synthesis of halogen-rich polysulfonates at room temperature in air with 100% atom economy in high yields was developed. The resulting polymers possess various properties, including post-functionalization, extraordinarily high refractive index, visible photodegradation, photoacid generation, multi-color and 3D fluorescent photopatterning, and practical broad-spectrum antibacterial activity.

Properties and Effects of Laser-Induced Plasma During Evaporative Deposition of Thin Films

1987 ◽  
Vol 93 ◽  
Author(s):  
H. Sankur ◽  
J. Denatale ◽  
W. J. Gunning
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Optical Absorption ◽  
Room Temperature ◽  
High Refractive Index ◽  
Laser Induced Plasma

ABSTRACTThe properties of plasmas generated by the interaction of a pulsed CO2 laser with several solid evaporation targets were studied and the films deposited from such plasmas were characterized. A large flux (˜ 1014/cm2/s) of ions at high velocities (2 − 10 × 106 cm/s) was measured in these plasmas. ZrO2 thin films deposited by laser-assisted evaporation on room temperature substrates had crystalline-oriented structures. Low optical absorption and high refractive index values (2.15 at 632.8 nm) indicated the stoichiometric and dense nature of these films.

scholarly journals Повышение эффективности интегрально-оптического сверхпроводящего датчика одиночных фотонов на подложке ниобата лития за счет дополнительного покровного слоя с высоким показателем преломления

2020 ◽  
Vol 46 (16) ◽  
pp. 39
Author(s):  
М.В. Парфенов ◽  
А.В. Шамрай
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Lithium Niobate ◽  
Optical Waveguides ◽  
Optical Radiation ◽  
High Refractive Index ◽  
Niobium Nitride ◽  
Superconducting Layer ◽  
Waveguide Modes ◽  
Absorption Of Light

A mechanism of amplification of interaction between optical radiation and superconducting niobium nitride thin film placed on the surface of optical waveguides, which are fabricated on lithium niobate substrate, is investigated. This effect can be obtained with help of an additional covering layer with high refractive index. It was shown that adiabatic deformation of waveguide modes can increase absorption of light in a superconducting layer up to ~ 1 dB/µm, making it possible to fabricate a SSPD on lithium niobate with quantum efficiency of about 70%.

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