Institute of Physics

Optical Properties of Transition Metal Dichalcogenide Heterostructures

Optička svojstva heterostruktura dihalkogenida prijelaznih metala

  • Home
  • Research
  • Laboratories
  • People
  • Publications

IP-2016-06-3211

News Published a paper in 2D Materials 06.03.2018. Dr. sc. M. Kralj held a keynote lecture on Photonica 2017 01.09.2017. Best poster award from European Physical Society on Photonica 2017 01.09.2017. Master thesis “Optical properties of Transition Metal Dichalcogenides” 13.07.2017.

Laboratories

 

Investigating optical properties of 2D materials

Raman spectrometer based on confocal microscope

   

Optical setup based on confocal microscope in backscattered configuration serves for absorption (contrast reflectivity), photoluminescence and Raman spectra measurements. Excitation laser power is maintained sufficiently low to avoid damage to the sample. At the moment, two excitation laser lines are provided: 532 nm and 630 nm. A home-made confocal microscope based on cage system design is equipped with an appropriate set of filters, dichroic mirrors, polarization plates and objective lens. Collected backscattered light is guided through an optical fiber with a 50 μm core diameter, which acts as a confocal detection pinhole to a 30 cm long spectrograph equipped with a cooled electron multiplying charge coupled device – EM CCD that increases sensitivity for challenging samples with low signal levels. Triple Raman spectrometer with 300, 600 and 1800 grooves/mm diffraction gratings is used to collect the absorption, photoluminescence and Raman spectra, respectively.

Equipped with xy-translator stages, confocal setup provides both a sequential sample movement and spectrum data acquisition from the defined sample area with sub-micron resolution. In this way spatial maps of the sample are created. A software platform is developed to deliver an intuitive and user-friendly interface for data acquisition, data processing, data analysis and display. Confocal spectral imaging will be used to obtain the local spectra at each scanning pixel position.

Synthesis of 2D materials

CVD oven 

Scanning probe microscopy

 

 

 

 

 

 

Device fabrication

FET transistor

OHTMD

Home
Research
Laboratories
People
Publications
ph2project rev 0.16.01130

Institute of Physics, Bijenička cesta 46, 10 0000 Zagreb, Croatia, tel: +385 1 469 8888, fax: +385 1 469 8889, e-mail: ifs@ifs.hr
Code & Design by Ndoc Deda
2025