| Broadband photoacoustic spectroscopy of CH414 with a high-power mid-infrared optical frequency comb J Karhu, T Tomberg, FS Vieira, G Genoud, V Hänninen, M Vainio, ... Optics Letters 44 (5), 1142-1145, 2019 | 41 | 2019 |
| Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy M Vainio, J Karhu Optics Express 25 (4), 4190-4200, 2017 | 37 | 2017 |
| Sub-ppb detection of benzene using cantilever-enhanced photoacoustic spectroscopy with a long-wavelength infrared quantum cascade laser J Karhu, H Philip, A Baranov, R Teissier, T Hieta Optics Letters 45 (21), 5962-5965, 2020 | 24 | 2020 |
| LED-Based Photoacoustic NO2 Sensor with a Sub-ppb Detection Limit J Karhu, T Hieta, F Manoocheri, M Vainio, E Ikonen ACS sensors 6 (9), 3303-3307, 2021 | 15 | 2021 |
| Double resonant absorption measurement of acetylene symmetric vibrational states probed with cavity ring down spectroscopy J Karhu, J Nauta, M Vainio, M Metsälä, S Hoekstra, L Halonen The Journal of chemical physics 144 (24), 2016 | 13 | 2016 |
| Simple method for mid-infrared optical frequency comb generation with dynamic offset frequency tuning M Roiz, K Kumar, J Karhu, M Vainio Apl Photonics 6 (2), 2021 | 12 | 2021 |
| Frequency comb assisted two-photon vibrational spectroscopy J Karhu, M Vainio, M Metsälä, L Halonen Optics Express 25 (5), 4688-4699, 2017 | 11 | 2017 |
| Radiocarbon dioxide detection using cantilever-enhanced photoacoustic spectroscopy M Fatima, T Hausmaninger, T Tomberg, J Karhu, M Vainio, T Hieta, ... Optics Letters 46 (9), 2083-2086, 2021 | 10 | 2021 |
| Step-modulated decay cavity ring-down detection for double resonance spectroscopy J Karhu, K Lehmann, M Vainio, M Metsälä, L Halonen Optics Express 26 (22), 29086-29098, 2018 | 10 | 2018 |
| Enhancement of photoacoustic spectroscopy with sorption enrichment for ppt-level benzene detection J Karhu, T Hieta Applied Optics 61 (8), 1892-1897, 2022 | 6 | 2022 |
| Cantilever-enhanced photoacoustic measurement of light-absorbing aerosols J Karhu, J Kuula, A Virkkula, H Timonen, M Vainio, T Hieta Aerosol Science and Technology 56 (1), 92-100, 2021 | 6 | 2021 |
| Cantilever-enhanced photoacoustic measurement of HTO in water vapor J Karhu, M Nyman, M Siitari-Kauppi, T Hieta Photoacoustics 29, 100443, 2023 | 5 | 2023 |
| Mid-infrared frequency comb with 25 pJ threshold via CW-seeded optical parametric generation in nonlinear waveguide M Roiz, JY Lai, J Karhu, M Vainio Optics Letters 46 (16), 4037-4040, 2021 | 5 | 2021 |
| High-resolution analysis of the ν3 band of radiocarbon methane 14CH4 S Larnimaa, L Halonen, J Karhu, T Tomberg, M Metsälä, G Genoud, ... Chemical Physics Letters 750, 137488, 2020 | 5 | 2020 |
| Efficient carrier-envelope phase tunable mid-infrared frequency combs based on CW-seeded optical parametric generation M Roiz, JY Lai, J Karhu, M Vainio EPJ Web of Conferences 255, 11002, 2021 | 1 | 2021 |
| Frequency stability and selectivity of a singly resonant continuous-wave optical parametric oscillator J Karhu Master’s thesis, University of Helsinki, 2014 | 1 | 2014 |
| Cantilever-Enhanced Photoacoustic Detector for Black and Brown Carbon J Karhu, J Kuula, T Mikkonen, M Ward, A Virkkula, E Ikonen, T Hieta, ... 2023 Conference on Lasers and Electro-Optics Europe & European Quantum …, 2023 | | 2023 |
| Detection Sensitivity of Dual-Comb Spectroscopy R Mikhail, S Larnimaa, J Karhu, M Vainio 2023 Conference on Lasers and Electro-Optics Europe & European Quantum …, 2023 | | 2023 |
| Cantilever-enhanced Photoacoustic Detector for Light-absorbing Aerosols J Karhu, J Kuula, A Virkkula, H Timonen, M Vainio, T Hieta Laser Applications to Chemical, Security and Environmental Analysis, LW4D. 5, 2022 | | 2022 |
| Monikanavaisen TMS: n kelojen suunnittelu ja rakentaminen J Karhu | | 2022 |
