Our latest work on two-photon-excited fluorescence of single quantum dots is now published in ACS Photonics! In a nutshell, we showed more than 10000-fold enhanced fluorescence of a single semiconductor quantum dot using a two-photon-excitation scheme. The high enhancement of this nonlinear effect arises mainly from the local field amplification… Continue reading
Congratulations to Dr Biswajit Pradhan, who successfully defended his PhD thesis titled “Fluorescence of Single Copper Proteins: Dynamic Disorder and Enhancement by a Gold Nanorod” on Tuesday 3 April 2018 at Leiden University’s Academy Building in the traditional manner. Dr. Biswajit Pradhan with his supervisor, Prof.dr. Michel Orrit. Continue reading
We are proud of our research! Our latest publication on nanothermometry is in the top-10 most-read NanoLetters papers of the month!
(left) Anti-Stokes emission spectra of an individual gold nanorod excited in resonance with different laser powers. The lines are fits using our model. (right) Extracted temperature of the nanorod for several excitation powers.
Briefly, in this paper we present a method to extract the absolute temperature of an individual gold nanorod by measuring the anti-Stokes emission spectra. We present a simple model to interpret the data and we show that we can achieve 4K accuracy in the temperature determination with only 180s integration time.
Congratulations to the authors!
On 16 June 2017, the Netherlands Organisation for Scientific Research NWO announced that Professor Michel Orrit is among the winners of this year’s Spinoza prize. The Spinoza Prize is the highest Dutch scientific award, and comes with a grant of 2.5 million euro to be spent on further scientific research.… Continue reading
Congratulations to Dr Aquiles Carattino, who successfully defended his PhD thesis titled “Gold Nanorod Photoluminescence — Applications to Imaging and Temperature Sensing” on Thursday 9 March 2017 at Leiden University’s Academy Building in the traditional manner. Aquiles Carattino (ctr), flanked by his paranymphs Martín Caldarola (l) and Pravin Kumar (r) Continue reading
We are proud of our recent publication on single-molecule electrochemistry using enhanced fluorescence as readout. We used gold nanorods as nanoatennas to reveal single-molecules of a redox sensitive dye, Methylene Blue, and studied the electrochemical properties of this molecule one by one. Leiden University’s Press release can be found here and… Continue reading