6 citations · 8 across the 3 of their papers we have counts for
7 papers · 1 filter
Role of polarized tip-enhanced Raman spectroscopy in the enhancement of interface optical phonon modes in AlGaN multi-quantum wells
A. K. Sivadasan, Prajit Dhara, Chirantan Singha +5
Group III nitride based two-dimensional multi-quantum well (MQW) nanostructures find remarkable applications in the visible to ultraviolet light sources. The interface optical (IFO…
Optical imaging of metallic and semiconductor nanostructures at sub wavelength regime
A. K. Sivadasan, Kishore K. Madapu, Prajit Dhara
The near field scanning optical microscopy (NSOM) is not only a tool for imaging of objects in the sub wavelength limit but also a prominent characteristic tool for understanding t…
Interface Phonon Modes in the [AlN/GaN]20 and [Al0.35Ga0.65N/Al0.55Ga0.45N]20 2D Multi Quantum Well Structures
A. K. Sivadasan, Chirantan Singha, A. Bhattacharyya +1
Interface phonon (IF) modes of c-plane oriented [AlN/GaN]20 and Al0.35Ga0.65N/Al0.55Ga0.45N]20 multi quantum well (MQW) structures grown via plasma assisted molecular beam epitaxy…
Optical properties of AlGaN nanowires synthesized via ion beam techniques
Santanu Parida, P. Magudapathy, A. K. Sivadasan +2
AlGaN plays a vital role in hetero-structure high electron mobility transistor by employing a two-dimensional electron gas and as electron blocking layer in the multi quantum well…
Piezoelectric Domains in the AlGaN Hexagonal Microrods: Effect of Crystal Orientations
A. K. Sivadasan, G. Mangamma, S. Bera +2
Presently, the piezoelectric materials are finding tremendous applications in the micro-mechanical actuators, sensors and self-powered devices. In this context, the studies pertain…
Polarized Raman and photoluminescence studies of a sub-micron sized hexagonal AlGaN crystallite for structural and optical properties
A. K. Sivadasan, S. Dhara
The polarized Raman spectroscopy is capable of giving confirmation regarding the crystalline phase as well as the crystallographic orientation of the sample. In this context, apart…