Ultra-high density optical data storage in common transparent plastics

DLN Kallepalli, AM Alshehri, DT Marquez… - Scientific Reports, 2016 - nature.com
The ever-increasing demand for high data storage capacity has spurred research on
development of innovative technologies and new storage materials. Conventional GByte …

Fabrication and optical characterization of microstructures in poly (methylmethacrylate) and poly (dimethylsiloxane) using femtosecond pulses for photonic and …

DLN Kallepalli, NR Desai, VR Soma - Applied Optics, 2010 - opg.optica.org
We fabricated several microstructures, such as buried gratings, surface gratings, surface
microcraters, and microchannels, in bulk poly (methylmethacrylate)(PMMA) and poly …

Space-selective creation of photonics functions in a new organic material: Femtosecond laser direct writing in Zeonex glass of refractive index change and …

R Que, L Houel-Renault, M Temagoult, C Herrero… - Optical Materials, 2022 - Elsevier
Abstract A Cyclo Olefin Polymer (COP), Zeonex® glass exhibits advantage for applications
in photonics: high transparency from NIR to UVA, humidity insensitivity and refractive index …

Localized nanoclusters formation in PDMS upon irradiation with femtosecond laser

AM Alshehri, KLN Deepak, DT Marquez… - Optical Materials …, 2015 - opg.optica.org
We demonstrate formation of localized carbonaceous and siliconaceous clusters, confined
to the modified region on a micron scale, when PDMS (polydimethylsiloxane) is irradiated by …

Luminescent microstructures in bulk and thin films of PMMA, PDMS, PVA, and PS fabricated using femtosecond direct writing technique

KLN Deepak, R Kuladeep, SV Rao, DN Rao - Chemical Physics Letters, 2011 - Elsevier
We present here the luminescent properties of microstructures obtained through
femtosecond (fs) laser direct writing (LDW) in bulk, and thin films of polymers such as poly …

Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices

LND Kallepalli, VR Soma, NR Desai - Optical Engineering, 2012 - spiedigitallibrary.org
We have investigated femtosecond-laser-induced microstructures (on the surface and within
the bulk), gratings, and craters in four different polymers: polymethyl methacrylate …

Multiphoton laser-induced confined chemical changes in polymer films

DLN Kallepalli, ATK Godfrey, J Walia, F Variola… - Optics …, 2020 - opg.optica.org
We report ultrafast-laser-induced photochemical, structural, and morphological changes in a
polyimide film irradiated at the polymer-glass interface in back-incident geometry. Back …

Demonstration of anisotropy control of optical properties induced by IR fs laser irradiation in organic materials: birefringence, di-attenuation, SHG, photoluminescence

R Que - 2022 - theses.hal.science
Femtosecond laser direct writing in materials has been studied due to its advantages in
micro-processing. The discovery of polarization effect found in controlling the crystallization …

Solvent-free optical recording of structural colours on pre-imprinted photocrosslinkable nanostructures

H Jiang, M Rezaei, M Abdolahi, B Kaminska - Nano Futures, 2017 - iopscience.iop.org
Optical digital information storage media, despite their ever-increasing storage capacity and
data transfer rate, are vulnerable to the potential risk of turning inaccessible. For this reason …

Femtosecond laser-fabricated microstructures in bulk poly (methylmethacrylate) and poly (dimethylsiloxane) at 800 nm towards lab-on-a-chip applications

KLN Deepak, S Venugopal Rao, D Narayana Rao - Pramana, 2010 - Springer
Laser direct writing technique is employed to fabricate microstructures, including gratings
(buried and surface) and two-dimensional photonic crystal-like structures, in bulk poly …