ESPCI web site

FR
|
EN

ESPCI Paris - PSL
ESPCI Paris - PSL is a major institution of higher education (a French "Grande École d’ingénieurs"), an internationally renowned research center, and a fertile ground of innovation for industry. Founded by the City of Paris in 1882, for over a century the School has attracted leading scientific innovators like Nobel Prize laureates Pierre and Marie Curie, Paul Langevin, Frédéric Joliot-Curie, Pierre-Gilles de Gennes, and Georges Charpak, who continue to contribute to the institution’s international reputation. The School’s culture of excellence remains as vibrant as ever. Fully 60% of (…)
Educational programs
Welcome to PSL University! By joining ESPCI paris- PSL, you also join PSL university and its 17 000 students. You get access to an exceptionnel education in sciences, arts, litterature and culture. From Bachelor to PhD, academic programs cover all the fields from sciences, human and social sciences, engineering and arts. PSL targets high-potential students, from every horizon, an accompagnies them towards excellence. Your education will be operated by ESPCI paris - PSL, and your degree delivered by PSL University. Discover the education programs of PSL University Ingénieur ESPCI Paris (…)
Research
ESPCI Paris - PSL is home to 10 research laboratories (all of them being endorsed and jointly sponsored by CNRS) operating at the frontiers of scientific knowledge and experimental know-how, extending from fundamental research to innovation, and covering areas ranging from polymers to telecommunications, from nanobiophysics to organic synthesis, from environmental science to biomedical imaging, from neurobiology to microfluidics, from soft matter to quantum physics, and from colloids to prototyping for industry. ESPCI researchers publish around 500 scientific articles in leading (…)
Innovation
- Inventions
- Entrepreneurship and business start-ups
ESPCI: generating innovation and jobs ESPCI is also known for its capacity to encourage major innovations. Did you know that as well as radium, polonium, actinium and lutecium, many other objects from our everyday lives were first discovered or created at ESPCI, like the neon tube, the black box, the quartz watch, sonar, wireless technology, self-healing rubber or even ultrafast ultrasound imaging? An entrepreneurial culture More and more graduates create their own companies after graduation or after their PhD. This capacity to innovation is highly valued today. ESPCI courses (…)
Internationalisation
The Department of International Relations is pursuing the intellectual globalisation, ambitioned since the foundation of our institution, in postgraduate education and interdisciplinary research, and welcoming the most talented people from around the world. We are focusing on branding of the iconic French elite engineering education and boosting european and international mobilities throughout the world-distinguished institutions. French Engeering Degree webpage Master Programme webpage Doctoral Study webpage
Support Us
ESPCI Paris is at the center of a large network of partnering agreements. These are three-way institutional partnerships - notably with the City of Paris, and ParisTech -, as well as academic, scientific and industrial partnerships enriched by the School’s energy, expertise and creativity. The commitment to transdisciplinarity extends beyond the School’s Paris campus. Today’s complex scientific and technological issues often demand a broader view and collaboration, with the deployment of complementary, hybrid approaches and the sharing of best practices in order to pool resources and (…)

Doctoral thesis viva voce: Arthur Babuty

Print version of this article

Contact :

22 February 2012 14:00 » 17:00 — Boreau lecture theater

Near-field optical study of active plasmonic sources in the infrared and local spectroscopy of the thermal emission

Arthur Babuty, doctorant - PhD student Crédits : ESPCI ParisTech
Arthur Babuty, doctorant - PhD student Crédits : ESPCI ParisTech
We present an apertureless scanning near-field optical microscopy (a-SNOM) analysis of quantum cascade lasers (QCLs) specially designed for the electrical generation of surface plasmonspolaritons (SPPs) in the mid infrared. SPPs are generated either by structuring the top surface of the ridge of the QCL with a metallic gold grating, or by direct coupling at the output facet of the laser with a metallic strip. When this strip is periodically structured, we demonstrate that is possible to give to the mid infrared SPPs confinement properties similar to ones found for visible SPPs on flat metallic surfaces. Shaping the grating end as a tip gives us the possibility to confine the energy of the SPPs on a sub-wavelength hot spot.

We also present the spectroscopy of the near field thermal emission obtained by coupling an a-SNOM – without external illumination - to a Fourier transform infrared spectrometer (FTIR). By studying polar materials which exhibit surface modes called surface phonons-polaritons, we measure their spectrum characterized in the near field by a monochromatic peak. This is the first experimental demonstration of the temporal coherence of the near-field thermal emission. We show that we measure the spectral variations of the local density of photonic states (LDOS) using a theoretical model developed by our collaborators. With this novel instrument, we are thus able to perform infrared spectroscopy with a spatial sub-wavelength resolution.

ÉCOLE SUPÉRIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS

10 Rue Vauquelin, 75005 Paris

ESPCI Paris

Educational programs

Research & innovation

Laboratories

Corporate

Become our partner