Spectroscopy

Sahand Tabatabaei presents SQUINT, a sensing platform that combines molecular electron spins, sensitive mechanical detection and control of spin interactions. Molecular sensors can be chemically adjusted and positioned near targets, offering flexibility that defects fixed inside a solid host cannot provide. The work uses a modified XYXY decoupling sequence to reduce dipolar interactions despite uneven control fields. In a sample containing roughly 100 trityl radicals, the reported coherence time reaches about 400 microseconds. These longer-lived spins enable frequency-selective measurements of weak alternating magnetic fields and spectroscopy of nearby nuclear-spin ensembles. The seminar explores how molecular control and mechanical readout can bring quantum sensing closer to complex chemical targets.

Marta Bryan explores what gas giants reveal about the formation and evolution of planetary systems. Their brightness and mass make them useful observational targets, and their gravitational influence can reshape the orbits and environments of smaller planets. The seminar combines several approaches. High-resolution spectroscopy of directly imaged planets measures rotation and obliquity, providing evidence about angular-momentum evolution. Radial-velocity searches for Jupiter-like companions to known inner planets probe how giant planets affect system architecture and inform the search for habitable worlds. The presentation also introduces observational work on planetary interiors and magnetic fields as further ways to test formation models.

The University of São Paulo's Terahertz Science, Technology and Innovation Group seeks a postdoctoral researcher to study low-energy collective excitations in quantum materials with terahertz spectroscopy. The project provides access to magneto-spectroscopy under intense magnetic fields and low temperatures and combines experimental infrastructure with national and international collaborations.

Join Eduardo Bañados’s group to investigate early quasars and their environments. The postdoc will analyze JWST PRISM-DAWN integral-field spectroscopy, contribute to Euclid’s quasar programme, and help prepare and reduce Large Binocular Telescope observations. The full-time position lasts three years, with a negotiable start; the first half of 2027 is preferred. This vacancy belongs to the September 2026 Max Planck Postdoc Program call, which accepts applications until 13 October 2026 at 12:00 CEST through the official application platform.

The FICOSS-AI project will develop an open-source pipeline integrating astrophysical models, spectral diagnostics and AI to study stellar populations and galaxy evolution. The fellow will combine machine learning, population-synthesis models and spectral-analysis tools, contribute to publications and mentor students technically. The expected start is 1 February 2027, or earlier if needed. Apply by 2 November 2026 with a CV, publication list and research-interest statement; two recommendation letters must be sent directly by referees as described on the official advertisement.

The University of São Paulo's Institute of Chemistry seeks a postdoctoral fellow to investigate how chemistry mediates interactions between plants and herbivores, with particular emphasis on biotransformations in lepidopteran digestive systems. The position is part of a FAPESP Thematic Project on molecular diversity and the specificity of plant-herbivore interactions.

Marta Bryan explores what gas giants reveal about the formation and evolution of planetary systems. Their brightness and mass make them useful observational targets, and their gravitational influence can reshape the orbits and environments of smaller planets. The seminar combines several approaches. High-resolution spectroscopy of directly imaged planets measures rotation and obliquity, providing evidence about angular-momentum evolution. Radial-velocity searches for Jupiter-like companions to known inner planets probe how giant planets affect system architecture and inform the search for habitable worlds. The presentation also introduces observational work on planetary interiors and magnetic fields as further ways to test formation models.

Sahand Tabatabaei presents SQUINT, a sensing platform that combines molecular electron spins, sensitive mechanical detection and control of spin interactions. Molecular sensors can be chemically adjusted and positioned near targets, offering flexibility that defects fixed inside a solid host cannot provide. The work uses a modified XYXY decoupling sequence to reduce dipolar interactions despite uneven control fields. In a sample containing roughly 100 trityl radicals, the reported coherence time reaches about 400 microseconds. These longer-lived spins enable frequency-selective measurements of weak alternating magnetic fields and spectroscopy of nearby nuclear-spin ensembles. The seminar explores how molecular control and mechanical readout can bring quantum sensing closer to complex chemical targets.

RIKEN’s Nanoscale Quantum Photonics Laboratory seeks one postdoctoral researcher for its collaboration with the Institute for Basic Science. The project combines optical spectroscopy and nanophotonics with scanning-tunneling nanospectroscopy to investigate quantum states and energy conversion in low-dimensional structures and molecular interfaces. The Wako-based appointment begins in January 2027 or later by agreement. Annual contracts may be renewed through August 2029. The official advert explicitly accepts applications until the position is filled and supplies document-upload instructions.

The University of São Paulo's Institute of Chemistry seeks a postdoctoral fellow to investigate how chemistry mediates interactions between plants and herbivores, with particular emphasis on biotransformations in lepidopteran digestive systems. The position is part of a FAPESP Thematic Project on molecular diversity and the specificity of plant-herbivore interactions.